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1.
Sood, Ritu.
Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;.
Degree: 2004, INFLIBNET
URL: http://shodhganga.inflibnet.ac.in/handle/10603/10183
► newline ABSTRACT newline newline Genetic analysis of morphological, biochemical and molecular traits of some novelty rices of Himachal Pradesh was carried out by using 17…
(more)
▼ newline ABSTRACT newline newline Genetic analysis
of morphological, biochemical and molecular traits of some novelty
rices of Himachal Pradesh was carried out by using 17 red pericarp
rices, 19 purple leaved rices and 11 quality rices along with three
checks in Randomized Block Design at Rice and Wheat Research
Centre, Malan (Kangra). The data was analyzed using statistical
procedures. Based on overall performance, Achhoo Baldhar,
IC3131159, Kijun and Tiyun among red pericarp rices; RLC-3, Lal
Nakanda-41, R-575 and Purple Baldhar among purple leaved rices and
LC99-5B, IC3131155 and Rajpur Basmati among quality rices were
found to be promising genotypes for further exploitation. Tiyun had
high sugar (10.4 mg/100g) and high protein content (14.0%). R-575
had high 1000-grain weight (32.1 g). IC3131166 and Rajpur Basmati
had long slender grains, high elongation after cooking and high
brown rice protein. Grain yield had significant positive
correlation with grains per panicle, plant height and spikelets per
panicle thus direct selection for those characters will be
effective. Based on path coefficient analysis tillers per plant,
panicle length, grains per panicle and 1000-grain weight had high
positive direct effects on yield. Molecular analysis based on RAPD
markers grouped 41 genotypes into cluster I, 25 of these were
grouped into cluster II of ISSR and 33 in cluster I of
D2-statistics (combined over years). This suggested similarity in
clustering pattern based on these techniques. Grouping of majority
of the genotypes into one cluster suggested affinity among the
genotypes indicating their origin in same geographical area.
Grouping based on pooling two types of markers revealed that
majority of the red pericarp rices and purple leaved rices grouped
into two distinct sub-clusters. Tremendous variation in anthocyanin
pigmentation of different plant parts was present in all red,
purple and quality rices. Among check variation was present only in
case of size of auricle. Auricles were absent in Achhoo and Achhoo
Baldhar. Varieties namely, China Purple, HPR-1194, HPR-2089,
HPR-2178, Palampur Purple and Nagrota Purple had dark purple leaf
blade, purple auricle, purple stigma and purple apiculus. Achhoo
Baldhar had long grains with dark red pericarp, whereas IC3131171
and IC3131159 had light red pericarp and long grains. newline
newline newline¬¬¬¬¬¬¬_______________________ _____________________
newlineSignature of student with date Signature of Major Advisor
newline newlineCountersigned newline newline________________
newlineHead of Department newline newline
Advisors/Committee Members: kaushik, R.P..
Subjects/Keywords: Plant breeding; Plant genetics; Rice
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Sood, R. (2004). Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;. (Thesis). INFLIBNET. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/10183
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sood, Ritu. “Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;.” 2004. Thesis, INFLIBNET. Accessed March 04, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/10183.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sood, Ritu. “Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;.” 2004. Web. 04 Mar 2021.
Vancouver:
Sood R. Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;. [Internet] [Thesis]. INFLIBNET; 2004. [cited 2021 Mar 04].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10183.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sood R. Genetic analysis of morphological biochemical and
molecular traits of some novelty rices of Himachal
Pradesh;. [Thesis]. INFLIBNET; 2004. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/10183
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba
2.
Cuthbert, Richard.
Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.).
Degree: Plant Science, 2011, University of Manitoba
URL: http://hdl.handle.net/1993/4760
► Septoria tritici blotch (Stb) is a major foliar disease of wheat worldwide caused by the fungal pathogen Mycosphaerella graminicola. This project mapped the chromosomal locations…
(more)
▼ Septoria tritici blotch (Stb) is a major foliar disease of wheat worldwide caused by the fungal pathogen Mycosphaerella graminicola. This project mapped the chromosomal locations of Stb resistance, which will be useful for wheat cultivar enhancement. In the first study of this project, Stb resistance and grain yield quantitative trait loci (QTL) were identified in a winter wheat doubled-haploid (DH) population produced from the cultivars Pastiche (resistant) and Torfrida (susceptible). A genetic map of the population was constructed using 104 microsatellite and 202 DArT markers. Separate disease and yield field trials were conducted in north-western Europe to measure natural Stb infection and grain yield, respectively. A resistance QTL from Pastiche was identified (QStb.jic-2A) that reduced flag leaf pycnidial density by 31.2% compared to the population mean. A second QTL from Pastiche (QYld.jic-2A) co-localized with QStb.jic-2A, and conferred an increase in grain yield of approximately 2.0% (0.19 t ha-1).
The second study determined the map location of the third multiple-isolate resistance gene in the hexaploid landrace Salamouni. A population was developed using the resistant DH line 98S05B*13 (Salamouni/Katepwa) crossed to the susceptible cultivar Katepwa. The parent 98S05B*13 was found to contain the resistance gene Stb14 on chromosome 3BS, therefore, to minimize the effect of this gene, individual plants of the F2 population were selected for self-pollination based on presence or absence of Stb14 using flanking microsatellite markers. The Stb14(+) F2:3 families were screened with M. graminicola isolate MG96-36. Bulked segregant analysis identified a possible linkage to the gene of interest on chromosome 3AS. Polymorphic microsatellite markers on 3AS were used to construct a linkage group. The markers barc321 and barc12 were found to flank the resistance gene at genetic distances of 1.9 and 2.5 cM, respectively. This position on 3AS has not been previously linked to Stb resistance and this gene will be designated StbSm3.
The third population was developed to fine map the isolate-specific resistance gene Stb14 located on chromosome 3B of Salamouni. A large population of 84 fixed recombinant F4 families was developed using the co-dominant microsatellite markers flanking Stb14. Attempts to identify clearly polymorphic molecular markers within the interval containing Stb14 were unsuccessful.
Advisors/Committee Members: Brûlé-Babel, Anita (Plant Science) (supervisor), Somers, Daryl (Plant Science) Gilbert, Jeannie (Biological Sciences) Goodwin, Stephen (Purdue University) (examiningcommittee).
Subjects/Keywords: Genetics; Pathology; Plant Breeding
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❌
APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Cuthbert, R. (2011). Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.). (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/4760
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cuthbert, Richard. “Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.).” 2011. Thesis, University of Manitoba. Accessed March 04, 2021.
http://hdl.handle.net/1993/4760.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cuthbert, Richard. “Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.).” 2011. Web. 04 Mar 2021.
Vancouver:
Cuthbert R. Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.). [Internet] [Thesis]. University of Manitoba; 2011. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1993/4760.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cuthbert R. Molecular mapping of septoria tritici blotch resistance in hexaploid wheat (Triticum aestivum L.). [Thesis]. University of Manitoba; 2011. Available from: http://hdl.handle.net/1993/4760
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wilfrid Laurier University
3.
Wright, Michael.
The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae).
Degree: 2011, Wilfrid Laurier University
URL: https://scholars.wlu.ca/etd/1039
► Cuscuta (Convolvulaceae), the dodders, is a genus of ca. 200 species of obligate stem parasites distributed across a great diversity of habitats worldwide. The existence…
(more)
▼ Cuscuta (Convolvulaceae), the dodders, is a genus of ca. 200 species of obligate stem parasites distributed across a great diversity of habitats worldwide. The existence of a handful of species that are dangerous crop weeds has led researchers to historically focus on their growth and control. Consequently, there is a dearth of information about their biodiversity, ecology, and in particular their reproductive biology. This thesis surveys aspects of sex allocation, floral evolution, floral rewards for pollinators, and mechanisms of reproductive assurance across the genus. I demonstrate that Cuscuta has evolved a broad spectrum of breeding systems, from obligate selfing to obligate outcrossing. Predictions made by sex allocation theory of negative correlations between pollen number and pollen grain size, and between male investment and female investment are shown to be false in Cuscuta. Histological examination of the floral nectary demonstrates that it is typical in structure, and I predict that it is functional in most facultatively and obligately xenogamous species. Cuscuta pollen is variable in the proportions of lipid and starch reserves, and has a sticky external pollenkitt. The role of the infrastaminal scales is narrowed to 1) defense against seed predators, and 2) a shield against early self-pollination in some strongly protandrous species. Lastlly, I demonstrate that the evolution of two styles, followed by unequal styles in Cuscuta, were critical for the radiation of the genus. The more flexible floral design enabled Cuscuta to evolve different mechanisms of reproductive assurance in coordination with their exploitation of novel host species and new pollination environments.
Subjects/Keywords: Plant Breeding and Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Wright, M. (2011). The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae). (Thesis). Wilfrid Laurier University. Retrieved from https://scholars.wlu.ca/etd/1039
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wright, Michael. “The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae).” 2011. Thesis, Wilfrid Laurier University. Accessed March 04, 2021.
https://scholars.wlu.ca/etd/1039.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wright, Michael. “The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae).” 2011. Web. 04 Mar 2021.
Vancouver:
Wright M. The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae). [Internet] [Thesis]. Wilfrid Laurier University; 2011. [cited 2021 Mar 04].
Available from: https://scholars.wlu.ca/etd/1039.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wright M. The Evolution of Sexual Reproduction in Cuscuta (Convolvulaceae). [Thesis]. Wilfrid Laurier University; 2011. Available from: https://scholars.wlu.ca/etd/1039
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Minnesota
4.
Ziyomo, Cathrine.
Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system.
Degree: PhD, Applied plant sciences, 2012, University of Minnesota
URL: http://purl.umn.edu/144409
► Direct selection for grain yield under stress conditions is often inefficient because the heritability for grain yield is greatly reduced under stress. The objectives of…
(more)
▼ Direct selection for grain yield under stress conditions is often inefficient because the heritability for grain yield is greatly reduced under stress. The objectives of the first study described in this thesis were to determine the efficiency of indirect selection for corn (Zea mays L.) grain yield under drought and low N conditions using secondary traits or molecular markers. Testcrosses of 238 intermated B73 x Mo17 recombinant inbreds were evaluated under drought and low N stress conditions. Results indicated that direct selection for grain yield in the targeted stress environment is more efficient than using secondary traits under both drought stress and low N stress. Using significant markers only was not more efficient than direct phenotypic selection for grain yield. The relative efficiency of genomewide selection was significantly greater than 1.0 for grain yield under drought stress but not for grain yield under low N stress. The results suggest that selection based on molecular markers is more efficient than phenotypic selection alone for the improvement of grain yield under drought stress, while for grain yield under low N stress, selection based on markers alone can only be more efficient if gains per unit time and cost are considered. In addition to the genetic improvement of corn for stress tolerance, the use of drought tolerant corn in a kura clover (Trifolium ambiguum M. Bieb.) intercropping system can reduce the competition for moisture between the grain crop and the cover crop. The objectives of the second study were to determine if drought tolerant corn can minimize the yield losses incurred when corn is intercropped with kura clover. Results indicate that drought-tolerant corn can maintain high yields and allow sufficient regrowth of kura clover and therefore significantly reduce the risk associated with intercropping corn with living mulch.
Subjects/Keywords: Plant breeding; Quantitative genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ziyomo, C. (2012). Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system. (Doctoral Dissertation). University of Minnesota. Retrieved from http://purl.umn.edu/144409
Chicago Manual of Style (16th Edition):
Ziyomo, Cathrine. “Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system.” 2012. Doctoral Dissertation, University of Minnesota. Accessed March 04, 2021.
http://purl.umn.edu/144409.
MLA Handbook (7th Edition):
Ziyomo, Cathrine. “Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system.” 2012. Web. 04 Mar 2021.
Vancouver:
Ziyomo C. Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system. [Internet] [Doctoral dissertation]. University of Minnesota; 2012. [cited 2021 Mar 04].
Available from: http://purl.umn.edu/144409.
Council of Science Editors:
Ziyomo C. Genetic analysis to improve drought and low nitrogen tolerance of corn in monoculture and in a kura clover intercropping system. [Doctoral Dissertation]. University of Minnesota; 2012. Available from: http://purl.umn.edu/144409

Eastern Illinois University
5.
Potter, Allen.
Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum.
Degree: MS, Biological Sciences, 2018, Eastern Illinois University
URL: https://thekeep.eiu.edu/theses/4569
► The NLG (Novel Leaf Gene) is a recently discovered gene from aspen (Populus tremula x alba). Previous research indicates that NLG impacts leaf shape.…
(more)
▼ The NLG (Novel Leaf Gene) is a recently discovered gene from aspen
(Populus tremula x alba). Previous research indicates that NLG impacts leaf shape. Our preliminary analyses indicate that NLG may function as a membrane bound protein with possible localization in plasma membrane and/or nucleus. Sequence and phylogenetic analyses in
Arabidopsis thaliana and
Populus trichocarpa identified four homologous genes in Arabidopsis and five in
Populus. Gene expression analysis was done using online tools and indicated that NLG is expressed in multiple tissue types but predominately in stem and flowers. The protein coding region of the NLG orthologs genes from aspen and Arabidopsis was cloned, and four gene constructs used in both organisms. Constructs consist of an overexpression of NLG from poplar, overexpression of the
Arabidopsis ortholog, two constructs consisting of gene fusion with GFP tags, one at the 5' and one at the 3' end of the poplar gene. An RNAi gene downregulation construct was also used for transformation of
Arabidopsis. Escherichia coli was used for cloning and replication of the plasmids and
Agrobacterium tumefaciens was used to transform
Arabidopsis thaliana and
Nicotiana tabacum (tobacco).
Arabidopsis is transformed using floral dip and tobacco is transformed by leaf disc transformation. Multiple transgenic lines from both species were produced. Transgene presence was verified by PCR in most of the lines and the successful inheritance was recorded for the next generations. Tobacco was used to study the impacts of the gene on the
plant phenotype. Gene overexpression of the orthologous genes from
Populus and
Arabidopsis shows clear impact on leaf and stem growth in tobacco. Leaf area is decreased while stem length is increased. Preliminary observations also indicate impact on stem and leaf anatomy influencing xylem and mesophyll development and growth.
Advisors/Committee Members: Yordan S. Yordanov, Barbara S. Carlsward, Thomas Canam.
Subjects/Keywords: Plant Breeding and Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Potter, A. (2018). Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum. (Masters Thesis). Eastern Illinois University. Retrieved from https://thekeep.eiu.edu/theses/4569
Chicago Manual of Style (16th Edition):
Potter, Allen. “Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum.” 2018. Masters Thesis, Eastern Illinois University. Accessed March 04, 2021.
https://thekeep.eiu.edu/theses/4569.
MLA Handbook (7th Edition):
Potter, Allen. “Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum.” 2018. Web. 04 Mar 2021.
Vancouver:
Potter A. Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum. [Internet] [Masters thesis]. Eastern Illinois University; 2018. [cited 2021 Mar 04].
Available from: https://thekeep.eiu.edu/theses/4569.
Council of Science Editors:
Potter A. Investigation of a Putative Membrane-Bound Protein in Arabidopsis thaliana and Nicotiana tabacum. [Masters Thesis]. Eastern Illinois University; 2018. Available from: https://thekeep.eiu.edu/theses/4569
6.
Damodran, Suresh.
Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development.
Degree: MS, Plant Science, 2012, South Dakota State University
URL: https://openprairie.sdstate.edu/etd/1339
► Biological nitrogen fixation in symbiotic nodules of leguminous crops viz. soybean reduces the use of chemical fertilizers providing economic and environmental benefits. Though not…
(more)
▼ Biological nitrogen fixation in symbiotic nodules of leguminous crops viz. soybean reduces the use of chemical fertilizers providing economic and environmental benefits. Though not completely understood, the molecular signaling events during nodule development are being identified. Class III homeodomain leucine zipper (HDZIPIII) proteins are a group of
plant specific transcriptional factors that are known to regulate several developmental process in Arabidopsis and other plants. Transcriptional, post-transcriptional and post-translational regulation of two GmHD-ZIPIII genes (GmHD-ZIPIII-1 & GmHD-ZIPIII-2) was examined in soybean roots inoculated with its symbiont Bradyrhizobium japonicum, to understand their role in root and nodule development. The expression of these genes was monitored using promoter:GUS and promoter:tdTomato constructs in hairy root composite soybean plants, at different time points post B. japonicum inoculation. These genes were expressed in the root tips, root vasculature, emerging lateral root, emerging nodule and vasculature of mature nodules suggesting a possible role of GmHD-ZIPIII in root lateral organ development. Examination of GmHD-ZIPIII gene expression along a time course of nodule development suggested that GmHD-ZIPIII-2 is up-regulated by B. japonicum inoculation. HD-ZIPIIIs are regulated in a post-transcriptional manner by miR166 in many
plant species. Cleavage of GmHD-ZIPIII transcripts by miR166 was experimentally validated using 5'-RLM-RACE assays. The expression levels of miR166 and the target GmHD-ZIPIIIs were identified using qRT-PCR and RNA sequencing respectively in emerging lateral roots, young lateral roots, emerging nodules and mature nodules. The results suggested that GmHD-ZIPIIIs are expressed at higher levels in emerging lateral organs compared to the respective mature organs. Examination of miR166 activity using a miR166 sensor suggested that miR166 spatially restricts GmHDZIPIII expression to the metaxylem and epidermis in the roots as observed in Arabidopsis. In symbiotic nodules, miR166 appears to spatially restrict GmHD-ZIPIII expression to the basal part of the nodule vasculature. The activity of HD-ZIPIII proteins are regulated in a post translational manner by small leucine zipper proteins (ZPRs). The interaction of GmHD-ZIPIII-1 & 2 proteins with all eight predicted ZPR proteins in soybean was examined using yeast-two-hybrid assay. Both GmHD-ZIPIII genes showed positive interaction with ZPR3b, ZPR3c and ZPR3d. Quantitative assays of interaction based on β-GAL activity (a marker gene in the assay) indicated that ZPR3d and GmHDZIPIII- 2 pair had the strongest interaction among the tested GmHD-ZIPIII and ZPR pairs. These observations suggested that GmHD-ZIPIII genes are indeed regulated at the transcriptional, post-transcriptional and post-translational levels in soybean. Subsequent experiments to examine significance of GmHD-ZIPIII regulation during nodule development would provide crucial insights in this crucial process.
Advisors/Committee Members: Senthil Subramanian.
Subjects/Keywords: Plant Breeding and Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Damodran, S. (2012). Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/1339
Chicago Manual of Style (16th Edition):
Damodran, Suresh. “Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development.” 2012. Masters Thesis, South Dakota State University. Accessed March 04, 2021.
https://openprairie.sdstate.edu/etd/1339.
MLA Handbook (7th Edition):
Damodran, Suresh. “Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development.” 2012. Web. 04 Mar 2021.
Vancouver:
Damodran S. Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development. [Internet] [Masters thesis]. South Dakota State University; 2012. [cited 2021 Mar 04].
Available from: https://openprairie.sdstate.edu/etd/1339.
Council of Science Editors:
Damodran S. Regulation of GmHD-ZIPIII During Soybean Root Lateral Organ Development. [Masters Thesis]. South Dakota State University; 2012. Available from: https://openprairie.sdstate.edu/etd/1339

Oklahoma State University
7.
Bryant-Schlobohm, Ryan.
Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States.
Degree: Crop Science, 2020, Oklahoma State University
URL: http://hdl.handle.net/11244/325489
► Bermudagrass is a robust forage option for livestock producers as both a grazed and stockpiled herbage. Breeding efforts focused on improved cold tolerance have expanded…
(more)
▼ Bermudagrass is a robust forage option for livestock producers as both a grazed and stockpiled herbage.
Breeding efforts focused on improved cold tolerance have expanded the geographic range of bermudagrass into the transition zone of the United States. However, many cold tolerant clonal hybrids experience a gap in yield potential and quality compared to southern adapted cultivars. Additionally, producers experience a limited option of seeded commercial cultivars that have the necessary adaptation for production within the transition zone. This study was conducted to genetically characterize collections of germplasm for the improvement of forage bermudagrass in the transition zone of the United States. A collection of 215 Cynodon dactylon SSR markers were identified as transferable to C. nlemfuensis, with confirmed effectiveness through a genetic diversity analysis. Transferable markers were used to identify interspecific hybrids from a cross between P3 1x7 and Tifton 68 that employed to develop a population with improved cold tolerance, yield potential, and forage quality in Stillwater and Perkins, OK. Population evaluations of 100 seeded genotypes were conducted in Goodwell, OK to characterize the genetic variation of biomass and reproductive traits, in addition to identifying elite germplasm for synthetic seeded cultivar development. Furthermore, a collection of 31 commercial cultivars and experimental accessions were characterized with SSR markers for molecular genetic diversity. Ten seeded genotypes and 25 interspecific hybrids were selected for further testing. Several trait associations were identified for indirect selection of seed and biomass yield. Furthermore, broad sense heritability estimates of interspecific hybrids displayed a significant genetic influence to adaptive trait performance. Molecular characterization confirmed a relatively narrow genetic base within current commercial cultivars. The genetic information, selections and SSR markers developed in the investigation will further enhance the capabilities of forage bermudagrass
breeding, as we seek to broaden the genetic base and improve key traits for transition zone performance.
Advisors/Committee Members: Wu, Yanqi (advisor), Anderson, Michael (committee member), Rocateli, Alex (committee member), Reuter, Ryan (committee member).
Subjects/Keywords: bermudagrass; genetics; plant breeding
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bryant-Schlobohm, R. (2020). Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/325489
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bryant-Schlobohm, Ryan. “Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States.” 2020. Thesis, Oklahoma State University. Accessed March 04, 2021.
http://hdl.handle.net/11244/325489.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bryant-Schlobohm, Ryan. “Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States.” 2020. Web. 04 Mar 2021.
Vancouver:
Bryant-Schlobohm R. Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States. [Internet] [Thesis]. Oklahoma State University; 2020. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/11244/325489.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bryant-Schlobohm R. Breeding and genetic characterization of forage bermudagrass for the transition zone of the United States. [Thesis]. Oklahoma State University; 2020. Available from: http://hdl.handle.net/11244/325489
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Pathak, Sunita.
Differential Gene Expression in Two Nodule Zones of Soybean.
Degree: MS, Agronomy, Horticulture, and Plant Science, 2017, South Dakota State University
URL: https://openprairie.sdstate.edu/etd/1713
► Soybean, a leguminous plant and rhizobia establishes symbiotic relationships, forming root nodules. Nodule organogenesis starts with cortical cell division forming infection and parenchyma zones…
(more)
▼ Soybean, a leguminous
plant and rhizobia establishes symbiotic relationships, forming root nodules. Nodule organogenesis starts with cortical cell division forming infection and parenchyma zones which houses N-fixing bacteria and block O2 for nitrogenase enzyme function, respectively. The mechanism by which root cortical cells give rise to two structurally and functionally different nodule tissues is not known. One approach to address this knowledge gap is to evaluate global gene expression patterns in these two tissue types during nodule development. Using INTACT method, we developed two promoters, ENOD2 (nodule parenchyma) and ENOD40 (infection zone) driven nuclear envelope biotin tagging constructs and isolated nuclei from targeted nodule zones with at least 88% purity and more than 50% efficiency. Nuclear transcriptomic validation using pathway analysis showed that cell wall, and lignin metabolic pathway related genes were highly enriched in nodule parenchyma while transport, and amino acid biosynthesis related genes were highly enriched in infection zone/nodule primordium. These were consistent with the currently known functions of these nodule tissue types. Further analysis with transcription factor families showed that members belonging to NIN-like transcription factor family typically associated with symbiosis were highly enriched in nodule primordium/infection zone at 5 and 10dpi (days post inoculation). Hormonal signaling and biosynthesis pathway analysis showed auxin signaling gene (ARF and AUX/IAA family) enriched in infection zone and cytokinin signaling gene related to HK family enriched in nodule parenchyma at 14dpi. This might possibly indicate tissue specific complementary roles of auxin and cytokinin in nodule development. Similarly, an auxin response factor (GLYMA17G37580, potential orthologue of Arabidopsis ARF5) was enriched in ENOD2- and ENOD40- promoter derived tissue at 7 and 10dpi respectively which indicated potential tissue specific roles for auxin during nodule development. Although we found expected expression pattern in two different tissue types, the statistical significance of the difference was < 0.03 due to variation between replicates of the same sample. It is expected that the use of additional replicates should provide more conclusive results. Ultimately, this knowledge is expected in giving a better understanding of specific genes crucial for development and function of two nodule zones.
Advisors/Committee Members: Senthil Subramanian.
Subjects/Keywords: Plant Breeding and Genetics; Plant Sciences
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APA (6th Edition):
Pathak, S. (2017). Differential Gene Expression in Two Nodule Zones of Soybean. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/1713
Chicago Manual of Style (16th Edition):
Pathak, Sunita. “Differential Gene Expression in Two Nodule Zones of Soybean.” 2017. Masters Thesis, South Dakota State University. Accessed March 04, 2021.
https://openprairie.sdstate.edu/etd/1713.
MLA Handbook (7th Edition):
Pathak, Sunita. “Differential Gene Expression in Two Nodule Zones of Soybean.” 2017. Web. 04 Mar 2021.
Vancouver:
Pathak S. Differential Gene Expression in Two Nodule Zones of Soybean. [Internet] [Masters thesis]. South Dakota State University; 2017. [cited 2021 Mar 04].
Available from: https://openprairie.sdstate.edu/etd/1713.
Council of Science Editors:
Pathak S. Differential Gene Expression in Two Nodule Zones of Soybean. [Masters Thesis]. South Dakota State University; 2017. Available from: https://openprairie.sdstate.edu/etd/1713

University of Guelph
9.
Loewen, Steven A.
An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes.
Degree: PhD, Department of Plant Agriculture, 2020, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/23669
► The processing tomato pre-breeding program at Ridgetown has had a goal of increasing genetic diversity in regionally adapted lines. Introgression between cultivated tomato and wild…
(more)
▼ The processing tomato pre-
breeding program at Ridgetown has had a goal of increasing genetic diversity in regionally adapted lines. Introgression between cultivated tomato and wild tomato relatives combined new diversity from the wild species into cultivated tomato. Formerly, evidence of genetic diversity was inferred indirectly, from the presence of traits in adapted tomato lines that were more commonly seen in wild species, or from records of wild species in the recent pedigrees. SNP data from a sample of Ridgetown
breeding lines and from the benchmark SolCAP processing tomato panel were used for principal component analysis (PCA), distance-matrix clustering and Bayesian clustering methods to compare 99 Ridgetown
breeding lines to the SolCAP panel. Twenty-six Ridgetown lines showed evidence of divergence from the SolCAP panel, indicating that regional
breeding programs can increase genetic diversity.
Breeding lines released over 24 years were compared to commercial processing tomato cultivars for their SNP diversity across time and across the genome. Diversity measures, measures of sub-population differentiation, PCA and Analysis of Molecular Variance (AMOVA) were used to compare the time-based sub-populations. FST-heterozygosity outlier detection was used to detect loci under selection. The second and third sub-populations diverged from the first sub-population reflecting changing
breeding objectives. Detection of sub-populations in the sampled lines by PCA, combined with results of AMOVA suggested greater influence of parents in the pedigree than year of release on genetic divergence. Segments of chromosomes 2, 5 and 11 appeared to behave as haplotypes in both
breeding lines and commercial cultivars.
The F2 segregation patterns for a complex of novel fruit, leaf and flower phenotypes are described. A four-locus model of Mendelian inheritance including pleiotropy and epistasis was developed. A QTL analysis on SNP markers in a RIL population derived from the F2 identified markers associated with the phenotypes. A QTL on chromosome 4, was pleiotropic for fruit, leaflet and corolla phenotypes and was in proximity to a structural constituent of a ribosome. It may play a regulatory role in expression of these phenotypes. The Ridgetown tomato
breeding program has been successful at increasing genetic diversity in
breeding lines for processing tomatoes in Ontario.
Advisors/Committee Members: Pauls, K. Peter (advisor).
Subjects/Keywords: tomato; plant breeding; plant genetics; genetic diversity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Loewen, S. A. (2020). An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes. (Doctoral Dissertation). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/23669
Chicago Manual of Style (16th Edition):
Loewen, Steven A. “An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes.” 2020. Doctoral Dissertation, University of Guelph. Accessed March 04, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/23669.
MLA Handbook (7th Edition):
Loewen, Steven A. “An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes.” 2020. Web. 04 Mar 2021.
Vancouver:
Loewen SA. An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes. [Internet] [Doctoral dissertation]. University of Guelph; 2020. [cited 2021 Mar 04].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/23669.
Council of Science Editors:
Loewen SA. An Ontario pre-breeding program contributed to genetic diversity in North American processing tomatoes. [Doctoral Dissertation]. University of Guelph; 2020. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/23669

University of Zambia
10.
Nkhoma, Nelia.
Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
.
Degree: 2014, University of Zambia
URL: http://hdl.handle.net/123456789/3413
► Zambia has a number of cowpea germplasm which are high yielding and contain antioxidants which are useful for preventing a lot of health problems i.e.…
(more)
▼ Zambia has a number of cowpea germplasm which are high yielding and contain antioxidants which are useful for preventing a lot of health problems i.e. Heart attack, Hypertension, Obesity and Cancer. Unfortunately the production suitability of these germplasm in the different areas of the country is not known. Based on this, a study was conducted to evaluate the stability of cowpea yield and antioxidants (total phenolic content and condensed tannin content) in the three agro ecological zones as well as to determine the relationship between the antioxidants and the seed coat colour of the cowpeas. Multilocation field trials involving ten cowpea genotypes were conducted at three different Agro-ecological Regions. A randomized complete block design was employed with 3 replications. Cowpea grain yield and antioxidant contents of the seed were determined and a stability bases analysis tool, Additive Main effect and Multiplicative Model (AMMI) was employed for data analysis. Assessment of genotype x environment (GxE) interaction on cowpea grain yield stability indicated that GxE was not present for yield indicating that genotypes did not respond differently to varying environmental conditions. However, some genotypes had higher yields than others indicating genotype identification to specific environments. Genotypes MS1/8/1/4 and LT11/3/3/12 were adapted to high potential yielding environment and were unstable while BB4/2/4/1 and LT11/5/2/2 were adapted to low yielding environment and were stable environments. Assessment for antioxidants showed that GxE was significant (p<0.01) and higher yielding genotypes had low antioxidant contents compared to low yielding genotypes. Genotype LT PRT had higher antioxidant concentration (3.47mg/100mgCE) and stable (IPCA2 0.022) while MS PRT had lower concentrations (0.17mg/100mgCE) and unstable (IPCA1 0.630). The genotypes which had higher antioxidant concentrations had darker seed coat colour (yellowish brown and purplish brown) compared to the ones which had low antioxidant concentration (white). This study identified stable genotypes in both yield and antioxidants. However, further studies for assessing yield stability are necessary and could be achieved by including more seasons and sites to get a better understanding of GxE and yield stability of cowpea in Zambia.
Subjects/Keywords: Cowpea-Germplasm Resources;
Plant Breeding;
Cowpea-Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nkhoma, N. (2014). Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
. (Thesis). University of Zambia. Retrieved from http://hdl.handle.net/123456789/3413
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nkhoma, Nelia. “Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
.” 2014. Thesis, University of Zambia. Accessed March 04, 2021.
http://hdl.handle.net/123456789/3413.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nkhoma, Nelia. “Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
.” 2014. Web. 04 Mar 2021.
Vancouver:
Nkhoma N. Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
. [Internet] [Thesis]. University of Zambia; 2014. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/123456789/3413.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nkhoma N. Stability of yield and Antioxidant content of selected advanced Cowpea(Vigna unguiculata [L]Walp.) mutation derived lines
. [Thesis]. University of Zambia; 2014. Available from: http://hdl.handle.net/123456789/3413
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Tripathi, Rajiv Kumar.
Genetical studies for agronomic and quality traits in
Indian mustard; -.
Degree: genetics, 2000, Bundelkhand University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/12525
None
Bibliography p.106-128
Advisors/Committee Members: Dabral, R K.
Subjects/Keywords: Genetics; Plant Breeding
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tripathi, R. K. (2000). Genetical studies for agronomic and quality traits in
Indian mustard; -. (Thesis). Bundelkhand University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/12525
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tripathi, Rajiv Kumar. “Genetical studies for agronomic and quality traits in
Indian mustard; -.” 2000. Thesis, Bundelkhand University. Accessed March 04, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/12525.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tripathi, Rajiv Kumar. “Genetical studies for agronomic and quality traits in
Indian mustard; -.” 2000. Web. 04 Mar 2021.
Vancouver:
Tripathi RK. Genetical studies for agronomic and quality traits in
Indian mustard; -. [Internet] [Thesis]. Bundelkhand University; 2000. [cited 2021 Mar 04].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/12525.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tripathi RK. Genetical studies for agronomic and quality traits in
Indian mustard; -. [Thesis]. Bundelkhand University; 2000. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/12525
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Adelaide
12.
Norman, Adam Luke.
[EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding.
Degree: 2019, University of Adelaide
URL: http://hdl.handle.net/2440/121300
► Plant breeding has a rich history of producing yield gains in bread wheat through the innovation and adoption of new technologies. This result is driven…
(more)
▼ Plant breeding has a rich history of producing yield gains in bread wheat through the innovation and adoption of new technologies. This result is driven by extensive research, first in developing the technology, and second on establishing its application. Genomic selection is a recent technology which over the past decade has been the focus of extensive research effort. This research has been highly effective at developing the technology, and our attention should now pivot towards establishing and refining the parameters under which it should be applied. If genomic selection is to be successfully implemented in wheat
breeding programmes breeders must be better informed on the optimal design of training strategies, and will also require cost-effective genotyping solutions. This body of work concentrates on delivering three overarching intended research outcomes: i) establish the achievable accuracy of genomic prediction in a large
breeding population, ii) identify criteria for the optimal design of a genomic selection training strategy, and iii) investigate concepts and formulate methods for reducing the cost of implementing genomic selection. We present a dataset of unprecedented size in genomic selection studies, and utilise it to address these objectives. In the first component of the project we confirmed the significant potential of genomic selection by producing high prediction accuracies in a large and representative set of
breeding germplasm, and showed genomic selection to be more accurate than marker assisted selection in all 14 traits tested. It was also demonstrated that genomic relationship information can be incorporated into the analysis of phenotype data to significantly improve model accuracy. The second component investigated factors affecting genomic prediction accuracy and how these relationships could be exploited in order to efficiently design accurate training strategies. We found that prediction accuracy continued to respond to training set size well beyond sizes previously tested in the literature, and that this response was independent of the genetic complexity of the trait. The impact of relatedness on prediction accuracy was highlighted, and it was shown that accuracy could be improved by increasing relatedness between training and prediction sets, or by increasing the diversity in the training set. To reduce the cost of implementing genomic selection, we present two novel methodologies for accurately utilising a low density genotyping platform. These approaches were shown to significantly increase the rate of genetic gain compared to a high density platform, with the same total genotyping expenditure. They could also be used to lower the cost of genomic selection without sacrificing genetic gain. The work presented here represents a significant resource which will inform pragmatic
plant breeders on how to effectively and efficiently implement genomic selection in their programmes. The findings clarify uncertainties and overcome constraints associated with applying genomic selection, and can…
Advisors/Committee Members: Kuchel, Haydn (advisor), Taylor, Julian (advisor), Edwards, James (advisor), School of Agriculture, Food and Wine (school).
Subjects/Keywords: Wheat; genetics; genomic selection; plant breeding
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Norman, A. L. (2019). [EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/121300
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Norman, Adam Luke. “[EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding.” 2019. Thesis, University of Adelaide. Accessed March 04, 2021.
http://hdl.handle.net/2440/121300.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Norman, Adam Luke. “[EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding.” 2019. Web. 04 Mar 2021.
Vancouver:
Norman AL. [EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding. [Internet] [Thesis]. University of Adelaide; 2019. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/2440/121300.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Norman AL. [EMBARGOED] Application and Optimisation of Genomic Selection for Wheat Breeding. [Thesis]. University of Adelaide; 2019. Available from: http://hdl.handle.net/2440/121300
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba
13.
Asselin, Sean Robert.
Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.).
Degree: Plant Science, 2012, University of Manitoba
URL: http://hdl.handle.net/1993/8363
► The ogu-INRA cytoplasmic male sterility (CMS) system is the global leader for the development of high quality hybrid canola and high erucic acid rapeseed (HEAR)…
(more)
▼ The ogu-INRA cytoplasmic male sterility (CMS) system is the global leader for the development of high quality hybrid canola and high erucic acid rapeseed (HEAR) cultivars of oilseed rape (Brassica napus L.). The largest challenge for
plant breeders using this system is the development of high quality restorer lines (R-lines) due to tight linkage of the radish (Raphanus sativus L.) derived restorer gene PPR-B and elevated seed glucosinolate concentration.
The purpose of this study was to identify improved quality restorer lines for hybrid cultivar development through both field studies and molecular marker development. In the first study 67 R-lines of different genetic backgrounds were screened over the course of two growing seasons and lines with significantly reduced glucosinolate concentration were identified. In the second study a new sequence characterized amplified region (SCAR) marker was successfully developed for the rapid screening of selections for the ogu-INRA CMS restorer gene PPR-B.
Advisors/Committee Members: McVetty, Peter B.E. (Plant Science) (supervisor), Crow, Gary (Animal Science) Li, Genyi (Plant Science) (examiningcommittee).
Subjects/Keywords: Plant Breeding; Genetics; Seed quality; Agronomy
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Asselin, S. R. (2012). Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.). (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/8363
Chicago Manual of Style (16th Edition):
Asselin, Sean Robert. “Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.).” 2012. Masters Thesis, University of Manitoba. Accessed March 04, 2021.
http://hdl.handle.net/1993/8363.
MLA Handbook (7th Edition):
Asselin, Sean Robert. “Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.).” 2012. Web. 04 Mar 2021.
Vancouver:
Asselin SR. Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.). [Internet] [Masters thesis]. University of Manitoba; 2012. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1993/8363.
Council of Science Editors:
Asselin SR. Seed quality improvement in the ogu-INRA CMS system in Oilseed Rape (Brassica napus L.). [Masters Thesis]. University of Manitoba; 2012. Available from: http://hdl.handle.net/1993/8363

University of Tennessee – Knoxville
14.
Smallwood, Christopher Joseph.
Molecular Breeding Strategies for Improvement of Complex Traits in Soybean.
Degree: 2015, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/3610
► Soybean [Glycine max (L.) Merrill] is the leading oilseed crop grown in the world. Yield, fatty acids, protein, and oil are commercially important soybean traits;…
(more)
▼ Soybean [Glycine max (L.) Merrill] is the leading oilseed crop grown in the world. Yield, fatty acids, protein, and oil are commercially important soybean traits; thus evaluation of breeding strategies for improvement of these traits is merited. To accomplish this, a comparison of molecular and phenotypic breeding strategies from progeny row selections was performed. From this it was determined that molecular strategies consistently outperformed phenotypic selections (PS) in the progeny row stage for soybean yield, fatty acids, protein, and oil. For yield, Epistacy was the preferred selection method. For fatty acids, protein, and oil, the genomic selection (GS) strategies were preferred. Additionally, a second comparison of molecular and phenotypic strategies was performed with selections from replicated field trials. These comparisons displayed mixed results except for yield, for which PS was the dominant method. With selection from replicated field trials, PS and GS methods were comparable for fatty acids, protein, and oil; indicating that either of these methods could be useful for making improvements. In addition to selection method evaluation, increased knowledge of genomic regions governing soybean yield, fatty acids, protein, and oil would be helpful. Thus, quantitative trait loci (QTL) detection was performed for these traits, with a total of 29 identified. Of these QTLs, three were candidates for confirmed status and four were candidates for positional confirmations. Additionally, possible candidate genes for soybean yield, fatty acids, protein and oil associated with QTLs in this study were identified; as were pleiotropic effects between protein and oil and between the fatty acids. The results from this research should be beneficial for those seeking to make soybean improvements. Researchers making selections from both progeny rows and replicated field trials can draw from these results when choosing which selection strategy to use. The gained knowledge of influential genomic regions for these traits can have application in improvement efforts. Future research seeking to implement high performing molecular breeding strategies and to identify causative genes for vi these and other QTLs impacting targeted traits will be important for the soybean breeding community.
Subjects/Keywords: soybean; plant breeding; genomic selection; quantitative trait; molecular breeding; fatty acid; Plant Breeding and Genetics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Smallwood, C. J. (2015). Molecular Breeding Strategies for Improvement of Complex Traits in Soybean. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/3610
Chicago Manual of Style (16th Edition):
Smallwood, Christopher Joseph. “Molecular Breeding Strategies for Improvement of Complex Traits in Soybean.” 2015. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed March 04, 2021.
https://trace.tennessee.edu/utk_graddiss/3610.
MLA Handbook (7th Edition):
Smallwood, Christopher Joseph. “Molecular Breeding Strategies for Improvement of Complex Traits in Soybean.” 2015. Web. 04 Mar 2021.
Vancouver:
Smallwood CJ. Molecular Breeding Strategies for Improvement of Complex Traits in Soybean. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2015. [cited 2021 Mar 04].
Available from: https://trace.tennessee.edu/utk_graddiss/3610.
Council of Science Editors:
Smallwood CJ. Molecular Breeding Strategies for Improvement of Complex Traits in Soybean. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2015. Available from: https://trace.tennessee.edu/utk_graddiss/3610

University of Arkansas
15.
Hummer, Wade Stiles.
Linkage Mapping for Soybean (Glycine Max) Flood Tolerance.
Degree: MS, 2018, University of Arkansas
URL: https://scholarworks.uark.edu/etd/3074
► Flood tolerance in soybean (Glycine max) is not a well-characterized trait, yet flooding damage is second only to drought stress in terms of yield…
(more)
▼ Flood tolerance in soybean (Glycine max) is not a well-characterized trait, yet flooding damage is second only to drought stress in terms of yield reduction. The objectives of this study were to determine genetic variation for flooding tolerance in two populations of soybean recombinant inbred lines (RILs) and to identify and confirm flood tolerant QTL. Population A (WHA) consisted of 111 RILs derived from the cross 5002T by 91210-350 and Population B (WHB) consisted of 79 RILs from the cross RA-452 by Osage. Experiments were conducted at the Rice Research and Extension Center (RREC) near Stuttgart, AR in 2015 and 2016. Flood damage score (FDS) was rated at three, six, and nine days after the flooding treatment was drained. In addition to FDS,
plant population was measured before and after the flooding treatment to calculate the percentage of surviving plants (PS). In 2015, Chlorophyll content was measured using a SPAD meter and normalized difference vegetative index (NDVI) was calculated in 2016. Both RIL populations and parents were genotyped using the SoySNP 6k beadchip with 908 and 1,466 polymorphic markers detected in WHA and WHB, respectively. Twenty nine QTL were identified, five of which validate prior studies involving soybean flood tolerance. Logarithm of Odds (LOD) values from ranged from 3.03 to 6.56 with R squared values ranging from 0.09 - 0.29. A QTL was identified on chromosome 7 that was stable across both WHA and WHB. In population WHA, this QTL was associated with both AUFPC and FDS and explained 9-10% of phenotypic variance. In population WHB, this QTL was associated with PS and explained 15% of phenotypic variance. The results of this study will aid in future development of flood-tolerant soybean germplasm and cultivars by validating previously reported QTL and demonstrating the usefulness of instruments in evaluating flood-tolerance.
Advisors/Committee Members: Richard E. Mason, Pengyin Chen, Kristofer Brye.
Subjects/Keywords: Agronomy; Genetics; Plant Breeding; Soybean; Agronomy and Crop Sciences; Plant Breeding and Genetics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hummer, W. S. (2018). Linkage Mapping for Soybean (Glycine Max) Flood Tolerance. (Masters Thesis). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3074
Chicago Manual of Style (16th Edition):
Hummer, Wade Stiles. “Linkage Mapping for Soybean (Glycine Max) Flood Tolerance.” 2018. Masters Thesis, University of Arkansas. Accessed March 04, 2021.
https://scholarworks.uark.edu/etd/3074.
MLA Handbook (7th Edition):
Hummer, Wade Stiles. “Linkage Mapping for Soybean (Glycine Max) Flood Tolerance.” 2018. Web. 04 Mar 2021.
Vancouver:
Hummer WS. Linkage Mapping for Soybean (Glycine Max) Flood Tolerance. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2021 Mar 04].
Available from: https://scholarworks.uark.edu/etd/3074.
Council of Science Editors:
Hummer WS. Linkage Mapping for Soybean (Glycine Max) Flood Tolerance. [Masters Thesis]. University of Arkansas; 2018. Available from: https://scholarworks.uark.edu/etd/3074

University of Arkansas
16.
Salgado Rojas, Alejandra Andrea.
Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program.
Degree: PhD, 2015, University of Arkansas
URL: https://scholarworks.uark.edu/etd/1346
► Quantitative trait loci (QTL) utilizing a pedigree-based analysis (PBA) approach was performed in the peach breeding program for the first time. The pedigree consisted…
(more)
▼ Quantitative trait loci (QTL) utilizing a pedigree-based analysis (PBA) approach was performed in the peach
breeding program for the first time. The pedigree consisted of seven-F1 populations, their parents, ancestors, and cultivars. Flesh firmness and titratable acidity (TA) were examined in 2011, 2012, and 2013. For TA, a consistent and strong QTL was identified on the proximal end of linkage group (LG) 5 of the peach genome. For flesh firmness, two QTLs were located on LG 4. The first QTL was located on the chromosomal region where the slow-melting flesh (SMF) DNA test was identified, and the second QTL was identified in the region of the endopolygalacturonase (endoPG) gene. However, the QTLs on LG 4 were not always consistent. These results indicate that PBA approach for QTL analysis can be applied with success in this mature and ongoing peach
breeding program with the aim to find molecular markers associated with relevant quality traits, which is the first step to apply marker-assisted
breeding (MAB). Also, DNA tests associated with TA and flesh firmness were analyzed with data taken in 2013 and 2014 on this pedigree and other seedlings, selections, and cultivars to predict acidity levels and flesh texture with the final goal to validate these DNA tests and apply MAB. These tests were able to predict correctly the expected acidity levels and flesh textures of the tested individuals.
Firmness and texture are critical traits in blackberry for breeders, growers, and consumers. Crispy and extremely firm fruits were characterized for two blackberry selections which had been observed to have low color reversion (a postharvest disorder). Firmness of these selections and its seedlings were tested in 2013 and 2014. Results indicated that crispy selections had superior firmness and a higher postharvest storage potential compared to cultivars and other selections in the program. These results are important, because firmness will be increased and color reversion will be reduced by use of this germplasm. This research also contributed to better understanding of the physical aspects of crispy and non-crispy genotypes, providing more information about this aspect of blackberries.
Advisors/Committee Members: John R. Clark, Maria Elena Garcia, Richard E. Mason.
Subjects/Keywords: Biological sciences; Fruit crops; Genetics; Plant breeding; Fruit Science; Plant Breeding and Genetics
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APA (6th Edition):
Salgado Rojas, A. A. (2015). Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/1346
Chicago Manual of Style (16th Edition):
Salgado Rojas, Alejandra Andrea. “Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program.” 2015. Doctoral Dissertation, University of Arkansas. Accessed March 04, 2021.
https://scholarworks.uark.edu/etd/1346.
MLA Handbook (7th Edition):
Salgado Rojas, Alejandra Andrea. “Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program.” 2015. Web. 04 Mar 2021.
Vancouver:
Salgado Rojas AA. Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program. [Internet] [Doctoral dissertation]. University of Arkansas; 2015. [cited 2021 Mar 04].
Available from: https://scholarworks.uark.edu/etd/1346.
Council of Science Editors:
Salgado Rojas AA. Applying Molecular and Phenotypic Tools to Characterize Flesh Texture and Acidity Traits in the Arkansas Peach Breeding Program and Understanding the Crispy Texture in the Arkansas Blackberry Breeding Program. [Doctoral Dissertation]. University of Arkansas; 2015. Available from: https://scholarworks.uark.edu/etd/1346

Stellenbosch University
17.
Slabbert, Johannes Diederick.
Continuation of a pre-breeding program for improving wheat yield.
Degree: MScAgric, Genetics, 2020, Stellenbosch University
URL: http://hdl.handle.net/10019.1/108223
► ENGLISH ABSTRACT: Wheat is a crop that has been cultivated around the globe for centuries and forms a substantial portion of the population’s diet, particularly…
(more)
▼ ENGLISH ABSTRACT: Wheat is a crop that has been cultivated around the globe for centuries and forms a
substantial portion of the population’s diet, particularly in third world countries. Food
security is under major stress with the human population increasing, thus it is important
to increase the amount of wheat produced to meet the demand. Higher yields along
with better quality can be reached by an increased breeding efficiency through
research and development of breeding techniques.
The aim of this study was to identify increased yield-related traits and introducing them
into the marker-assisted recurrent selection (MS-MARS) facilitated pre-breeding
program of the Stellenbosch University Plant Breeding Lab (SU-PBL) to breed wheat
lines higher yields. Germplasm was identified through literature that could benefit the
breeding program by having traits related to increased yield. The standard set of the
SU-PBLs molecular markers were used to make informed decisions during the
selection process. Remote sensing by a Remote Pilot Aircraft System (RPAS) was
used to perform detailed observations of wheat and was compared to traditional
instruments. Field- and post-harvest phenotyping was done to aid in the selection of
lines with high-yielding traits.
Lines with high yield-related traits were identified by using the different techniques and
were introduced into the MS-MARS scheme. R-squared values of linear regression
models displayed that the RPAS data could not predict the phenotypic data in the field,
except for yield. Scatter plot matrices shown that there was no correlation between the
data captured by the traditional instruments and the RPAS. The field and post-harvest
data indicated that a nearest neighbour analysis (NNA) was the best option during this
study as there were field trends and the data was used in the selection process.
Future studies should include the addition of molecular markers that correlate with
increased yield-related traits to make more informed decisions during selection. The
development of cameras and software for remote sensing will definitely benefit the tool.
Additional vegetative indices can be explored and the model can be improved over
time by the addition of data.
AFRIKAANSE OPSOMMING: Koring is 'n gewas wat al eeue heen wereldwyd verbou word en vorm 'n belangrike
deel van basiese voeding, veral in die derde wêreld. Voedselsekerheid is onder groot
druk terwyl die bevolking toeneem, en dit is dus belangrik om die hoeveelheid koring
wat geproduseer word, te verhoog om aan die vraag te voldoen. Hoër opbrengste en
beter gehalte kan bereik word deur 'n verhoging in teelprogramme se effektiwiteit deur
navorsing en ontwikkeling van teeltegnieke.
Die doel van hierdie studie was om verhoogde opbrengs verwante eienskappe te
identifiseer en dit in die merker bemiddelde herhalende seleksie (MS-MARS)
gefasiliteerde voorteelprogram van die Universiteit Stellenbosch
Planteteeltlaboratorium (SU-PBL) in te sluit ten einde lyne met hoër opbrengs te teel.
…
Advisors/Committee Members: Botes, Willem, Visser, Marike, Stellenbosch University. Faculty of AgriSciences. Dept. of Genetics..
Subjects/Keywords: Germplasm resources, Plant; Plant breeding; Selection (Plant breeding); Crops – Genetics; Wheat – Yields – Mathematical models; UCTD
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Slabbert, J. D. (2020). Continuation of a pre-breeding program for improving wheat yield. (Masters Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/108223
Chicago Manual of Style (16th Edition):
Slabbert, Johannes Diederick. “Continuation of a pre-breeding program for improving wheat yield.” 2020. Masters Thesis, Stellenbosch University. Accessed March 04, 2021.
http://hdl.handle.net/10019.1/108223.
MLA Handbook (7th Edition):
Slabbert, Johannes Diederick. “Continuation of a pre-breeding program for improving wheat yield.” 2020. Web. 04 Mar 2021.
Vancouver:
Slabbert JD. Continuation of a pre-breeding program for improving wheat yield. [Internet] [Masters thesis]. Stellenbosch University; 2020. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/10019.1/108223.
Council of Science Editors:
Slabbert JD. Continuation of a pre-breeding program for improving wheat yield. [Masters Thesis]. Stellenbosch University; 2020. Available from: http://hdl.handle.net/10019.1/108223
18.
Bhusal, Siddhi Jeewan.
Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions.
Degree: PhD, Plant Science, 2016, South Dakota State University
URL: https://openprairie.sdstate.edu/etd/1007
► Soybean aphid (Aphis glycines Matsumura) has been a major pest of soybean [Glycine max (L.) Merr.] in North America particularly in the northern United…
(more)
▼ Soybean aphid (Aphis glycines Matsumura) has been a major pest of soybean [Glycine max (L.) Merr.] in North America particularly in the northern United States and three Canadian provinces. At least four biotypes of soybean aphid have been confirmed in the United States. Identification of soybean aphid resistance sources in early-maturing soybeans and genetic characterization of new sources of resistance will facilitate to expand the gene pool of soybean aphid resistance and thus will help to develop soybean aphid resistant cultivars. To identify new sources of resistance in early maturing soybeans, 330 soybean germplasm accessions from Maturity Group (MG) I, along with 11 resistant or susceptible checks, were evaluated against soybean aphid in greenhouse by caged (no-choice) and non-caged tests. Germplasm accessions that showed resistance in these tests were then tested in the field under natural infestations supplemented by artificial infestation. In the greenhouse tests, accessions PI 189946, PI 153214, and PI 437075 exhibited low SA levels (test) similar to those on resistant checks. Six accessions (PI 378663, PI 603587A, PI 567250A, PI 603326, PI 603339A, and PI 603546A) showed moderate aphid resistance withfield, PI 567250A and PI 603339A performed similar to resistant checks, and PI 153214 and PI 437075 showed moderate aphid resistance. Across all three tests, PI 567250A and PI 603339A exhibited consistently low levels of aphid infestation and thus may be useful in soybean
breeding as newly identified sources of SA resistance. To characterize the genetic basis of soybean aphid resistance in PI 603712, a newly identified resistant gemplasm line, 142 F2 plants derived from the cross ‘Roberts’ x PI 603712 and their parents were evaluated for soybean aphid resistance in the greenhouse, and were genotyped with BARCSoySNP6K Illumina Infinium II BeadChip. A genome-wide molecular linkage map was constructed with 1495 polymorphic SNP markers. QTL analysis revealed that PI 603712 possessed two major loci of soybean aphid resistance, which were located on chromosome 7 and 16, respectively. The locus on chromosome 7 was dominantly expressed and positioned about one Mega-base-pair (Mb) far from the previously identified resistance locus Rag1. The locus on chromosome 16 was partially dominant and positioned near the previously identified resistance locus Rag3. Interestingly, two minor loci for susceptibility were also detected on chromosomes 13 and 17 in PI 603712. In developing soybean aphid resistant cultivars through marker-assisted selection, an appropriate combination of resistance loci should be selected when PI 603712 is used as a donor parent of resistance. To dissect the genetic architecture of soybean aphid resistance, genome-wide association study (GWAS) was conducted in a population consisting of 330 early maturing germplasm accessions which were genotyped with the Illumina Infinium SoySNP50K BeadChip. Phenotyping was performed in the USDA-ARS Eastern South Dakota Soil and Water Research Farm near Brookings in…
Advisors/Committee Members: Jose L. Gonzalez-Hernandez.
Subjects/Keywords: Plant Biology; Plant Breeding and Genetics; Plant Sciences
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhusal, S. J. (2016). Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions. (Doctoral Dissertation). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/1007
Chicago Manual of Style (16th Edition):
Bhusal, Siddhi Jeewan. “Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions.” 2016. Doctoral Dissertation, South Dakota State University. Accessed March 04, 2021.
https://openprairie.sdstate.edu/etd/1007.
MLA Handbook (7th Edition):
Bhusal, Siddhi Jeewan. “Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions.” 2016. Web. 04 Mar 2021.
Vancouver:
Bhusal SJ. Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions. [Internet] [Doctoral dissertation]. South Dakota State University; 2016. [cited 2021 Mar 04].
Available from: https://openprairie.sdstate.edu/etd/1007.
Council of Science Editors:
Bhusal SJ. Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions. [Doctoral Dissertation]. South Dakota State University; 2016. Available from: https://openprairie.sdstate.edu/etd/1007

University of Tennessee – Knoxville
19.
Hughes, Eifion Wyn.
Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass.
Degree: MS, Plant Sciences, 2014, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_gradthes/2725
► For bioenergy crops to be an economical alternative to fossil fuels, rapid biological and technological advancements will need to occur. Some advancements can be…
(more)
▼ For bioenergy crops to be an economical alternative to fossil fuels, rapid biological and technological advancements will need to occur. Some advancements can be accomplished by producing new switchgrass (
Panicum virgatum L.) varieties with higher biomass and ethanol yields. The objective of this research was to quantify biomass and ethanol yield potential of four F
1 [F1] half-sib populations for future variety development as a bioenergy crop.
The four parental lines were PI 421999 (AR), PI 607837 (TX), PI 421552 (Cimarron), and Exp. NSL-2001-1 (OK). Seed for one hundred and forty F
1 [F1] half-sib progeny were produced in a polycross nursery at the East Tennessee Research and Education Center (ETREC),
Plant Sciences Unit, Knoxville. The parents and half-sibs were evaluated at the ETREC, Holston Unit. Evaluations were based on a fall one-cut biomass system in 2010 – 2011 and a fall biomass harvest following a spring forage harvest system in 2012 - 2013. Samples of the above ground biomass harvest for each
plant were collected every year and analyzed for ethanol production. Agronomic trait ratings (
plant height, tiller count, tiller size, leaf angle, leaf width, and bloom score) were conducted each year.
Mean biomass yield was 1.04 kg
plant-1 [
plant-1] for all populations and years, with average biomass yields among populations ranging from 0.57 to 2.12 kg
plant-1 [
plant-1]. Panmictic heterosis was observed in two of the four years (2011 and 2012) of the study. Within family genetic variances for 2010, 2011, 2012, and 2013 ranged from 0 to 0.10, 0.61, 0.44, and 0.06 respectively. Broad-sense heritability values ranged from 0 to a high of 0.78. Correlations were observed between yield and
plant height (r=0.65) and leaf width (r=0.36).
Predicted ethanol yield was 0.27 L ethanol
plant-1 [
plant-1] across years and populations. The highest ethanol yield was 1.32 L
plant-1 [
plant-1]. Mean lignin content was 76 g lignin kg DM
-1 [DM-1]. Data from 2012 indicated greater ethanol yields from stems than from leaves. The leaves contained higher percentages of cellulose (41-42%) than the stems (40-42%), while the stems were comprised of higher percentages of both hemicellulose (43-44%) and lignin (6.0 – 6.1%).
Advisors/Committee Members: Fred L. Allen, Hem S. Bhandari, Dennis R. West, Arnold M. Saxton.
Subjects/Keywords: Switchgrass; Breeding; Ethanol; Biomass; Yield; Heterosis; Plant Breeding and Genetics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hughes, E. W. (2014). Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/2725
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hughes, Eifion Wyn. “Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass.” 2014. Thesis, University of Tennessee – Knoxville. Accessed March 04, 2021.
https://trace.tennessee.edu/utk_gradthes/2725.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hughes, Eifion Wyn. “Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass.” 2014. Web. 04 Mar 2021.
Vancouver:
Hughes EW. Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass. [Internet] [Thesis]. University of Tennessee – Knoxville; 2014. [cited 2021 Mar 04].
Available from: https://trace.tennessee.edu/utk_gradthes/2725.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hughes EW. Genetic Variability for Biomass Yield, Yield Components, and Ethanol Yield among Half-sibs of Switchgrass. [Thesis]. University of Tennessee – Knoxville; 2014. Available from: https://trace.tennessee.edu/utk_gradthes/2725
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arkansas
20.
Frett, Terrence James.
Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program.
Degree: PhD, 2016, University of Arkansas
URL: https://scholarworks.uark.edu/etd/1448
► For over two decades the incorporation of marker-assisted selection (MAS) has been discussed as an innovative approach to increase peach breeding efficiency. Although hundreds…
(more)
▼ For over two decades the incorporation of marker-assisted selection (MAS) has been discussed as an innovative approach to increase peach
breeding efficiency. Although hundreds of quantitative trait loci (QTLs) have been identified, only a few have been converted into usable MAS tools. This highlights a disconnect between genomic discoveries and practical application in
breeding programs, which has delayed use of MAS.
In this dissertation, three sequential steps were performed with the objective to bridge this gap and develop
breeding-relevant DNA tests for MAS of fruit bacterial spot resistance (Xap1 and Xap6), fruit quality [blush (Rf), acidity (D), and acidity and soluble solid content (G7Flav)], and phenological traits [maturity date (G4mat), fruit type (G), and flesh color (Y)] across four RosBREED peach
breeding programs. First, previously identified QTLs were further investigated and 32 SNPs were grouped into haplotypes and validated for association with
breeding-relevant trait differences across RosBREED germplasm. The SNPs were divided into two mini-arrays and advanced
breeding material from all programs were outsourced for design and testing. The validated SNP loci were used in marker-assisted parent selection (MAPS) in 2013-2015 at the University of Arkansas (UA) program to combine horizontal Xap resistance with high fruit quality spanning the season. Secondly, four of the SNP-based tests (Xap1, Xap6, G, and Y loci) were converted into sequence length polymorphism-based (SLP-based) tests (Ppe-XapF1-SSR, Ppe-XapF6-SSR, indelG, and PpCCD4b-SSR) and screened on the UA RosBREED germplasm and 22 additional F1 populations. Results were compared across both DNA tests to identify the most efficient genotyping approach for each trait. In 2015, two of the SLP-based DNA tests, the indelG (pubescent vs. glabrous) and PpCCD4b-SSR (white vs. yellow flesh) were advanced to test in marker-assisted seedling selection (MASS).
In the final step, QTL analysis was conducted for Xap fruit, Xap leaf, and Xap leaf-assay resistance along with seven fruit quality and phenological traits using the Pedigree-Based Analysis (PBA) approach and the UA RosBREED pedigree. Overall 20 QTLs were identified, 10 for Xap resistance and 10 for quality and phenological traits. These 20 QTLs are optimal targets for future DNA test development, validation, and use in MAS.
Advisors/Committee Members: John R. Clark, Burton H. Bluhm, Elena M. Garcia.
Subjects/Keywords: Biological sciences; Breeding; Disease resistance breeding; Fruit; Horticulture; Marker-assisted breeding; Qtl; Fruit Science; Plant Biology; Plant Breeding and Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Frett, T. J. (2016). Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/1448
Chicago Manual of Style (16th Edition):
Frett, Terrence James. “Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program.” 2016. Doctoral Dissertation, University of Arkansas. Accessed March 04, 2021.
https://scholarworks.uark.edu/etd/1448.
MLA Handbook (7th Edition):
Frett, Terrence James. “Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program.” 2016. Web. 04 Mar 2021.
Vancouver:
Frett TJ. Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program. [Internet] [Doctoral dissertation]. University of Arkansas; 2016. [cited 2021 Mar 04].
Available from: https://scholarworks.uark.edu/etd/1448.
Council of Science Editors:
Frett TJ. Genetic Determinism of Xanthomonas arboricola pv. pruni (Xap) Resistance, Fruit Quality, and Phenological Traits in Peach and Incorporation of Marker-Assisted Selection (MAS) in the University of Arkansas Peach and Nectarine Breeding Program. [Doctoral Dissertation]. University of Arkansas; 2016. Available from: https://scholarworks.uark.edu/etd/1448

University of Tennessee – Knoxville
21.
Wiggins, Suzannah Joy.
Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill].
Degree: MS, Plant Sciences, 2012, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_gradthes/1221
► Phytate [myo-inositol 1,2,3,4,5,6-hexakisphosphate] is a mixed cation salt of phytic acid which binds to other minerals, in many field crops including soybean [Glycine max…
(more)
▼ Phytate [
myo-inositol 1,2,3,4,5,6-hexa
kisphosphate] is a mixed cation salt of phytic acid which binds to other minerals, in many field crops including soybean [Glycine max (L.) Merr.]. Livestock with monogastric digestive systems lack the ability to break bonds between phytate and these minerals, causing phytate phosphorus (P) to be excreted in the waste and contributing to possible P and other mineral deficiencies. Discovery of single sequence repeat (SSR) and single nucleotide polymorphism (SNP) markers associated with low phytate QTL (cqPha-001 and cqPha-002) have aided in development of low phytate soybean lines. The objectives of this study were to 1) utilize SSRs and SNPs to identify the heterozygous and recessive allelic forms of low phytate loci during trait introgression into a high yielding commercial cultivar; 2) evaluate differences in genotypic values for agronomic and seed quality traits, and seed inorganic phosphorous (Pi) concentration between the recurrent parent 5601T and BC
4, BC
3, and BC
2 derived progeny lines; and 3) evaluate those traits and environmental stability of inorganic P in the recurrent parent 5601T and the BC
4 derived line TN09-239 across ten southern U.S. environments. Successful trait introgression was confirmed in the BC
4 line TN09-239 via SNP assay. In comparison to the recurrent parent 5601T (222.9 ng µL
-1) the BC
4 derived line TN09-239 (1675.9 ng µL
-1) contained significantly higher Pi (P-1 for 5601T and 3151 kg ha
-1 for TN09-239) (P0.05), while TN09-239 had a slope significantly different from zero as well as from one (P
Advisors/Committee Members: Vincent R. Pantalone, Dennis R. West, Dean A. Kopsell, Carl E. Sams.
Subjects/Keywords: Soybean breeding; low phytate; Agricultural Science; Agronomy and Crop Sciences; Genetics; Plant Breeding and Genetics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wiggins, S. J. (2012). Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill]. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/1221
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wiggins, Suzannah Joy. “Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill].” 2012. Thesis, University of Tennessee – Knoxville. Accessed March 04, 2021.
https://trace.tennessee.edu/utk_gradthes/1221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wiggins, Suzannah Joy. “Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill].” 2012. Web. 04 Mar 2021.
Vancouver:
Wiggins SJ. Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill]. [Internet] [Thesis]. University of Tennessee – Knoxville; 2012. [cited 2021 Mar 04].
Available from: https://trace.tennessee.edu/utk_gradthes/1221.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wiggins SJ. Molecular Marker Assisted Development and Stability Analysis of Low Phytate, High Inorganic Phosphorus Soybean [Glycine max (L.) Merrill]. [Thesis]. University of Tennessee – Knoxville; 2012. Available from: https://trace.tennessee.edu/utk_gradthes/1221
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cornell University
22.
Hultengren, Rachel.
Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast.
Degree: M.S., Plant Breeding, Plant Breeding, 2017, Cornell University
URL: http://hdl.handle.net/1813/59003
► The goal of the work outlined in this thesis was to employ the techniques of plant breeding while engaging farmers in dialogue about priorities for…
(more)
▼ The goal of the work outlined in this thesis was to employ the techniques of
plant breeding while engaging farmers in dialogue about priorities for the organic vegetable production community. This thesis details an effort to hear from Northeastern farmers about the traits that matter to them in the crop varieties they grow, and describes
breeding projects to develop new varieties of bell pepper and winter squash for organic vegetable farmers in the northern US. Chapter One reviews research related to
breeding for organic production and briefly introduces the Northern Organic Vegetable Improvement Collaborative (NOVIC), a partnership of public
plant breeding programs developing new vegetable varieties suited to organic management. Chapter Two describes work done in 2015 to hear from organic vegetable growers in the Northeast in order to establish
breeding, research and education priorities to strengthen organic production in the region. The third and fourth chapters detail the goals, process, and results to date of specific
breeding projects under NOVIC.
Advisors/Committee Members: Mazourek, Michael (chair), Lewenstein, Bruce Voss (committee member).
Subjects/Keywords: Agriculture; Genetics; Communication; Organic Agriculture; Plant Breeding; Bell pepper; Participatory plant breeding; Winter squash
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APA (6th Edition):
Hultengren, R. (2017). Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/59003
Chicago Manual of Style (16th Edition):
Hultengren, Rachel. “Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast.” 2017. Masters Thesis, Cornell University. Accessed March 04, 2021.
http://hdl.handle.net/1813/59003.
MLA Handbook (7th Edition):
Hultengren, Rachel. “Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast.” 2017. Web. 04 Mar 2021.
Vancouver:
Hultengren R. Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast. [Internet] [Masters thesis]. Cornell University; 2017. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1813/59003.
Council of Science Editors:
Hultengren R. Establishing breeding priorities and developing cultivars for organic vegetable growers in the Northeast. [Masters Thesis]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/59003
23.
ROMERO NAVARRO, JORGE ALBERTO.
Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity.
Degree: PhD, Plant Breeding, 2017, Cornell University
URL: http://hdl.handle.net/1813/56994
► The characterization of natural genetic diversity and the exploration of its relationship with variation in phenotypic traits is of great interest for evolutionary, conservation, and…
(more)
▼ The characterization of natural genetic diversity and the exploration of its relationship with variation in phenotypic traits is of great interest for evolutionary, conservation, and improvement purposes; in addition, understanding the relationships between genotype, phenotype, and the environment can provide insight on the molecular pathways controlling quantitative traits, as well as their fitness implications. The following work entails the characterization of a comprehensive panel of maize landraces from Latin America and is divided in 5 sections.
The chapter "Identifying the diamond in the rough: a study of allelic diversity underlying flowering time adaptation in maize landraces" describes the general experimental design used to characterize the landrace panel. In this chapter the relationship between large scale altitude and latitude adaptation is also explored, and the trait flowering time is used as a case study to explore the genetic architecture of a complex trait through field experiments. The chapter "Genome-environment association allows identifying useful adaptive alleles from maize landraces" explores further the relationship between the genotypic variation in landraces and their adaptation to local abiotic environmental conditions. Because landraces have evolved for thousands of years in those environments, we observe significant association at candidate genes and observed that adaptive alleles are common and shared across populations, which has important consequences for future
breeding efforts. The chapter "Genome wide association for
plant height variation in maize landraces" represents the analysis of the genetic basis of
plant height variation in landraces.
Plant height, like yield, is a very complex trait with a significant heritable component. The association at key hormonal regulators, as well as flowering time associated regions, shows the potential to unveil genes underlying this trait, however the results of phenotypic prediction suggest that higher marker density is necessary to study traits on this order of complexity in a panel of very diverse landraces. The chapter "Exploring the potential for finding sources of resistance to Fusarium ear rot among maize landraces" represents the analyses of phenotypic evaluation of inoculated ear rot trials. Lastly, the final chapter "Integration of controlled populations and association mapping to score cytological features in the maize genome" describes the joint analyses of a mapping population segregating for the abnormal chromosome 10 and the landraces accessions. By combining the results of both populations, putative calls are made in the landraces regarding their chromosome 10 allele.
Advisors/Committee Members: Buckler, Edward S. (chair), Mezey, Jason G. (committee member), Smith Einarson, Margaret Elizabeth (committee member).
Subjects/Keywords: Landraces; Maize; Quantitative Genetics; Genetics; Genomics; Plant Breeding
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
ROMERO NAVARRO, J. A. (2017). Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/56994
Chicago Manual of Style (16th Edition):
ROMERO NAVARRO, JORGE ALBERTO. “Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity.” 2017. Doctoral Dissertation, Cornell University. Accessed March 04, 2021.
http://hdl.handle.net/1813/56994.
MLA Handbook (7th Edition):
ROMERO NAVARRO, JORGE ALBERTO. “Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity.” 2017. Web. 04 Mar 2021.
Vancouver:
ROMERO NAVARRO JA. Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity. [Internet] [Doctoral dissertation]. Cornell University; 2017. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1813/56994.
Council of Science Editors:
ROMERO NAVARRO JA. Comprehensive characterization of maize landraces: integrative strategies to identify and deploy useful allelic diversity. [Doctoral Dissertation]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/56994
24.
Dean, Deborah.
Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats.
Degree: 2014, University of Tennessee – Knoxville
URL: https://trace.tennessee.edu/utk_graddiss/3118
► The genus Viburnum was established in 1753 by Linnaeus and is the largest genus in the Adoxaceae and consists of approximately 160 species. Viburnum species…
(more)
▼ The genus Viburnum was established in 1753 by Linnaeus and is the largest genus in the Adoxaceae and consists of approximately 160 species. Viburnum species are small trees which grow throughout the temperate regions of the Northern Hemisphere (Hoch, 1995). While this genus shares little variety in fruit and flower morphology, it is diverse in many other traits. As molecular studies advance, this large genus continues to undergo reclassification. Here three SSR libraries were constructed to discern additional molecular insight into this vast genus.
Microsatellite markers were developed to characterize Viburnum on several different levels. V. dilatatum is an introduced Asian species that has a wide range of desirable horticultural traits, but this is countered with a propensity for its seedlings to become invasive, therefore creating an interest in the genetics and breeding of this species. Eleven SSR markers were used to characterize V. dilatatum, and are expected to aid in breeding programs that are attempting to develop new cultivars and assist with early detection and screening of plants that have escaped cultivation.
Genetic diversity and population structure was examined in the native species V. rufidulum. The populations examined were found to have a low to moderate genetic differentiation and high level of gene flow. The greatest genetic variation was found to exist within populations. This coupled with the high cross transferability of the SSR markers to other Viburnum species are expected to be helpful in refining the phylogenetic relationship of Viburnum and other genera in Adoxaceae.
In the past the Viburnum has undergone various reclassifications based on morphological and molecular studies. Thirty-three microsatellite markers were developed from V. dilatatum, V. farreri, and V. rufidulum and utilized to characterize the relationships between various taxa. Cross transferability of the loci was analyzed and the polymorphic information content ranged from 0.42 to 0.97%. Three loci were used to construct a phylogenic tree. Sequence alignments indicated well preserved primer sites and resulted in cross transferability among many Viburnum species and to other genera. We expect this set of SSR markers to of utility in future genetic studies, marker assisted selection, and breeding programs.
Subjects/Keywords: Viburnum; SSR; population genetics; genetic diversity; Plant Breeding and Genetics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Dean, D. (2014). Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/3118
Chicago Manual of Style (16th Edition):
Dean, Deborah. “Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats.” 2014. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed March 04, 2021.
https://trace.tennessee.edu/utk_graddiss/3118.
MLA Handbook (7th Edition):
Dean, Deborah. “Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats.” 2014. Web. 04 Mar 2021.
Vancouver:
Dean D. Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2014. [cited 2021 Mar 04].
Available from: https://trace.tennessee.edu/utk_graddiss/3118.
Council of Science Editors:
Dean D. Assessing the genetic diversity of the genus <i>Viburnum</i> using simple sequence repeats. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2014. Available from: https://trace.tennessee.edu/utk_graddiss/3118

Cornell University
25.
Levina, Anna.
GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH.
Degree: PhD, Plant Breeding, 2019, Cornell University
URL: http://hdl.handle.net/1813/67673
► Plant improvement requires selection, which can be complicated when the genetic basis of a trait is complex or poorly understood. In an effort to better…
(more)
▼ Plant improvement requires selection, which can be complicated when the genetic basis of a trait is complex or poorly understood. In an effort to better understand the genetic control of potato (Solanum tuberosum) tuber composition, we performed non-targeted metabolomic profiling to generate a deep (but largely anonymous) dataset, and analyzed the data with a combination of genetic and network approaches. Water/methanol extracts of cooked potato tuber cores from 185 clones that had previously been genotyped by the Solanaceae Coordinated Agricultural Project (SolCAP) were analyzed by LC/MS-MS; this resulted in the detection of 981 features that represent a mixture of primary metabolites, specialized metabolites and hydrolyzed fragments of abundant proteins. Using GWASpoly, an R package that considers gene dosage through a series of genetic models, 472 features could be associated with at least one single nucleotide polymorphism (SNP) marker, markedly increasing the number of marker-trait associations that have been made in potato to date. Unexpectedly, SNPs associated with features were not uniformly distributed throughout the genome, but were instead clustered on chromosomes 3, 7, and 8, with dozens of features associated with several small (~2 Mbp) regions. Also of note was that the most significant SNPs for several glycoalkaloids (α-chaconine, β-chaconine, and α-solamarine) – detected on chromosomes 2, 7, and 8 – are unlinked to any known glycoalkaloid biosynthetic genes. Network analysis condensed the 981 features into 44 modules, whose eigenvalues were then used to explore correlations with phenotype data collected by SolCAP, as well as for genetic mapping. Half of the modules were associated with at least one SNP according to GWAS; 11 of these were also significantly correlated with chip color. Loci associated with module eigenvalues were not evenly distributed throughout the genome, but like individual features, were instead clustered on chromosomes 3, 7 and 8. Unexpectedly, the features within modules were structurally disparate, suggesting that linkage disequilibrium confounds network analyses in potato. This research expanded the number of known marker-traits associations in potato by more than 50-fold, and identified potential selection targets to modify potato chip quality and glycoalkaloid content by identifying genetic markers correlated with these traits.
Advisors/Committee Members: De Jong, Walter S. (chair), Mazourek, Michael (committee member), Perry, Keith Lloyd (committee member).
Subjects/Keywords: Potato; Genetics; Plant Breeding; Network Analysis; Agriculture; Plant sciences
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Levina, A. (2019). GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/67673
Chicago Manual of Style (16th Edition):
Levina, Anna. “GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH.” 2019. Doctoral Dissertation, Cornell University. Accessed March 04, 2021.
http://hdl.handle.net/1813/67673.
MLA Handbook (7th Edition):
Levina, Anna. “GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH.” 2019. Web. 04 Mar 2021.
Vancouver:
Levina A. GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH. [Internet] [Doctoral dissertation]. Cornell University; 2019. [cited 2021 Mar 04].
Available from: http://hdl.handle.net/1813/67673.
Council of Science Editors:
Levina A. GENETIC CONTROL OF POTATO TUBER COMPOSITION: A SYSTEMS BIOLOGY APPROACH. [Doctoral Dissertation]. Cornell University; 2019. Available from: http://hdl.handle.net/1813/67673

Iowa State University
26.
Ibore, Martha.
Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes.
Degree: 2017, Iowa State University
URL: https://lib.dr.iastate.edu/etd/16517
► Soybean aphids are a major problem to soybean growers worldwide and they cause great yield losses. In the United States, soybean aphids can cause yield…
(more)
▼ Soybean aphids are a major problem to soybean growers worldwide and they cause great yield losses. In the United States, soybean aphids can cause yield losses of up to 50% especially on susceptible varieties. Yield losses attributed to feeding by soybean aphids can be reduced by cultivating resistant soybean varieties. In recent years, certain biotypes of soybean aphids that can colonize resistant soybean plants have been reported, suggesting the continued need for identification of novel sources of aphid resistance to include in plant breeding programs. While gene pyramiding, in which certain resistant soybean genotypes carry more than one aphid resistance gene has been effectively used to mitigate the problem of virulent aphid biotypes on resistant soybean, the molecular mechanisms of increased resistance in soybean genotypes with multiple genes is still unknown. Research presented in this dissertation utilized a genome-wide association study (GWAS) to identify novel sources of soybean aphid resistance and characterize the genetic architecture of aphid resistance in a diverse panel of USDA soybean accessions. Using RNA-seq, the molecular mechanisms of increased resistance that results from pyramiding two aphid-resistance genes (Rag1 and Rag2) in one soybean genotype (Rag1Rag2) were elucidated.
In the GWAS project, we identified significant Single Nucleotide Polymorphisms (SNPs) located in genomic regions of four soybean chromosomes that contained prospective candidate genes associated with aphid resistance. Two chromosomes have never been reported before. Identification of novel resistance sources allows the possibility of using the accessions and SNPs for marker assisted selection in plant breeding programs, reducing the time needed to develop resistant soybean genotypes.
Our RNA-seq study revealed that pyramiding the two aphid-resistance genes in one soybean genotype resulted in a synergistic effect on resistance to soybean aphids at the molecular level. Specifically, there were sets of differentially expressed genes that were present in the Rag1Rag2 response but absent in the Rag1-alone or Rag2-alone response, indicating activation of different defense pathways in Rag1Rag2 soybean genotype compared to genotypes with individual genes. This project allowed the identification of aphid-responsive genes that can be targeted in future functional genomics studies to validate their role in resistance to soybean aphids.
Subjects/Keywords: Aphids; Breeding; Genes; Plant; Resistance; Soybean; Agriculture; Genetics; Plant Sciences
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ibore, M. (2017). Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/16517
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ibore, Martha. “Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes.” 2017. Thesis, Iowa State University. Accessed March 04, 2021.
https://lib.dr.iastate.edu/etd/16517.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ibore, Martha. “Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes.” 2017. Web. 04 Mar 2021.
Vancouver:
Ibore M. Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes. [Internet] [Thesis]. Iowa State University; 2017. [cited 2021 Mar 04].
Available from: https://lib.dr.iastate.edu/etd/16517.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ibore M. Genetic architecture of antibiosis and antixenosis aphid resistance in soybean and elucidation of the molecular effect of pyramiding Rag1 and Rag2 resistance genes. [Thesis]. Iowa State University; 2017. Available from: https://lib.dr.iastate.edu/etd/16517
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Iowa State University
27.
De La Fuente, Gerald Neil.
Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system.
Degree: 2015, Iowa State University
URL: https://lib.dr.iastate.edu/etd/14767
► The maize (Zea mays L.) in vivo maternal doubled haploid system has been widely applied to maize breeding and genetics in recent decades and is…
(more)
▼ The maize (Zea mays L.) in vivo maternal doubled haploid system has been widely applied to maize breeding and genetics in recent decades and is an important part of the majority of public and private maize breeding programs today. The principal advantage of the doubled haploid system is the ability to generate completely homozygous inbred lines in as little as two seasons. Other advantages to this system include more rapid integration of loci of interest and increased usefulness over traditional lines developed through self-pollination. In this dissertation, some of the major problems in the maternal doubled haploid system are addressed. Namely, improvement of maternal inducers, improved understanding of the genetics controlling inducibility, development of an automated system to sort haploid kernels, investigation and application of spontaneous chromosome doubling, and a proposal for the acceleration of the breeding cycle beyond doubled haploids through the in vitro nursery. This dissertation provides some new insight into these problems, as follows. The development and release of a new improved maternal haploid inducer for use in doubled haploid programs. Improved understanding of the quantitative nature of inducibility and the effects of misclassification are discussed. Successful automated discrimination of haploid and diploid kernels using optical and fluorescence methods is described. In an effort to make the doubled haploid system more efficient and safe, a bypass of the colchicine doubling step is proposed through the application and investigation of spontaneous chromosome doubling in haploid plants. Finally, as a proposal for what could be the next step in accelerating the breeding cycle, the in vitro nursery and its applications is discussed.
Subjects/Keywords: Plant Breeding; doubled haploids; maize; Agriculture; Genetics; Plant Sciences
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De La Fuente, G. N. (2015). Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/14767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
De La Fuente, Gerald Neil. “Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system.” 2015. Thesis, Iowa State University. Accessed March 04, 2021.
https://lib.dr.iastate.edu/etd/14767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
De La Fuente, Gerald Neil. “Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system.” 2015. Web. 04 Mar 2021.
Vancouver:
De La Fuente GN. Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system. [Internet] [Thesis]. Iowa State University; 2015. [cited 2021 Mar 04].
Available from: https://lib.dr.iastate.edu/etd/14767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
De La Fuente GN. Improvements to the maize (Zea mays L.) in vivo maternal doubled haploid system. [Thesis]. Iowa State University; 2015. Available from: https://lib.dr.iastate.edu/etd/14767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University
28.
Brisco, Elizabeth Ilona.
Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification.
Degree: 2012, Michigan State University
URL: http://etd.lib.msu.edu/islandora/object/etd:361
► Thesis Ph. D. Michigan State University, Plant Breeding, Genetics and Biotechnology Program / Crop and Soil Sciences 2012.
Empoasca species leafhoppers are a major insect…
(more)
▼ Thesis Ph. D. Michigan State University, Plant Breeding, Genetics and Biotechnology Program / Crop and Soil Sciences 2012.
Empoasca species leafhoppers are a major insect pest of common bean, Phaseolus vulgaris that cause significant economic losses in both tropical (E. kraemeri) and temperate (E. fabae) regions of the Americas resulting in up to 80% crop yield reductions. Chemical controls are costly, reducing profitability by increasing input costs, and potentially causing damage to the environment and human health. Breeding beans for leafhopper resistance can provide an alternative control of this pest. The current study examined Empoasca spp. resistance by evaluating leaf curl and leaf burn damage as well as Empoasca spp. nymph counts in an inbred backcross line population (Matterhorn*/EMP507) of beans in temperate and tropical climates. Field screening in Michigan and Puerto Rico in 2009-2011 identified the existence of tolerance, antixenosis and antibiosis mechanisms of resistance to E. fabae and E. kraemeri in this population. Thirteen QTL associated with resistance to E. fabae and E. kraemeri were identified on six bean chromosomes that explained from 22.8 % to 61.5 % of the phenotypic variation of individual traits. A major QTL (LH7.1) associated with multiple resistance traits was detected for both leafhopper species in multiple seasons on Pv07. This QTL was tightly linked to the P gene that confers the presence of color in the seed coat, validating a similar QTL identified in previous studies. A novel QTL for E. fabae nymph counts was identified on Pv02 that may be associated with antibiosis resistance. Resistance to each leafhopper species appear to be controlled by separate genetic mechanisms in common bean.
Description based on online resource; title from PDF t.p. (ProQuest, viewed on Oct. 15, 2014).
Advisors/Committee Members: Kelly, James D, Wang, Dechun, Cichy, Karen, DiFonzo, Christine.
Subjects/Keywords: Common bean; Empoasca; Plant breeding; Genetics; Biotechnology; Plant sciences; Agriculture
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brisco, E. I. (2012). Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:361
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brisco, Elizabeth Ilona. “Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification.” 2012. Thesis, Michigan State University. Accessed March 04, 2021.
http://etd.lib.msu.edu/islandora/object/etd:361.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brisco, Elizabeth Ilona. “Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification.” 2012. Web. 04 Mar 2021.
Vancouver:
Brisco EI. Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Mar 04].
Available from: http://etd.lib.msu.edu/islandora/object/etd:361.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brisco EI. Empoasca leafhopper species resistance in common bean, Phaseolus vulgaris : field screening and QTL identification. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:361
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Montana State University
29.
Kolar, John J.
The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat.
Degree: MS, College of Agriculture, 1952, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/5568
Subjects/Keywords: Wheat.; Plant genetics.; Plant breeding.
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kolar, J. J. (1952). The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/5568
Chicago Manual of Style (16th Edition):
Kolar, John J. “The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat.” 1952. Masters Thesis, Montana State University. Accessed March 04, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/5568.
MLA Handbook (7th Edition):
Kolar, John J. “The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat.” 1952. Web. 04 Mar 2021.
Vancouver:
Kolar JJ. The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat. [Internet] [Masters thesis]. Montana State University; 1952. [cited 2021 Mar 04].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/5568.
Council of Science Editors:
Kolar JJ. The influence of environmental factors on the degree of stem solidness expressed by selections from crosses involving rescue wheat. [Masters Thesis]. Montana State University; 1952. Available from: https://scholarworks.montana.edu/xmlui/handle/1/5568

Montana State University
30.
Blake, Nancy Kay.
Transgenic alfalfa : development and characterization.
Degree: MS, College of Agriculture, 1991, Montana State University
URL: https://scholarworks.montana.edu/xmlui/handle/1/6964
Subjects/Keywords: Alfalfa.; Plant genetics.; Plant breeding.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Blake, N. K. (1991). Transgenic alfalfa : development and characterization. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/6964
Chicago Manual of Style (16th Edition):
Blake, Nancy Kay. “Transgenic alfalfa : development and characterization.” 1991. Masters Thesis, Montana State University. Accessed March 04, 2021.
https://scholarworks.montana.edu/xmlui/handle/1/6964.
MLA Handbook (7th Edition):
Blake, Nancy Kay. “Transgenic alfalfa : development and characterization.” 1991. Web. 04 Mar 2021.
Vancouver:
Blake NK. Transgenic alfalfa : development and characterization. [Internet] [Masters thesis]. Montana State University; 1991. [cited 2021 Mar 04].
Available from: https://scholarworks.montana.edu/xmlui/handle/1/6964.
Council of Science Editors:
Blake NK. Transgenic alfalfa : development and characterization. [Masters Thesis]. Montana State University; 1991. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6964
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