Thesis
QTL mapping of stripe rust resistance and end-use quality in winter wheat (Triticum aestivum L.)
Washington State University
Master of Science (MS), Washington State University
2015
Handle:
https://hdl.handle.net/2376/100755
Abstract
Wheat (Triticum aesticum L.) is one of the most widely grown crops throughout the world. Its global significance and distribution make breeding efforts for biotic and abiotic resistance key to wheat's continued success. The objective of this study was to map quantitative trait loci using SNP and SSR markers in two winter wheat mapping populations, 'Finch' by 'Eltan' and 'Bauermeister' by Farnum', for stripe rust resistance (Puccinia striiformis f. sp. tritici) and end-use quality, respectively. The Finch by Eltan recombinant inbred lines (RILs) were rated for stripe rust infection during the 2012-2014 growing season in Pullman and Central Ferry, WA. A linkage map of 683 SNPs and 70 SSR markers successfully detected two potentially novel stripe rust QTLs, QYr.wak-4A contributed by Eltan and QYr.wak-6B contributed by Finch. QYr.wak-4A, on chromosome 4A, will be submitted for an official Yr designation for adult-plant resistance in reducing infection type score by one and disease severity by 10%. The second mapping population, Bauermeister by Farnum, was evaluated for 21 end-use quality traits during the 2012 and 2013 growing season in Lind and Ritzville, WA. A linkage map constructed using 620 SNPs detected 10 QTLs for milling, mixing, and baking traits on chromosomes 1A, 2B, 3A, 3B, 5B and 6B. Significant QTLs were location-specific and contributed a relatively small phenotypic improvement when the positive parental allele was present. The markers associated with the traits of interest found in these studies will be useful for marker-assisted selection in wheat breeding programs.
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Details
- Title
- QTL mapping of stripe rust resistance and end-use quality in winter wheat (Triticum aestivum L.)
- Creators
- Emily Frances Klarquist
- Contributors
- Arron H. Carter (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Crop and Soil Sciences, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525087001842
- Language
- English
- Resource Type
- Thesis