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Genome Wide Association Study of Soybean [(Glycine max (L.) Merr.] Germplasm Derived from Canadian X Chinese Crosses to Mine for Unique Seed-Yield Alleles

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Title: Genome Wide Association Study of Soybean [(Glycine max (L.) Merr.] Germplasm Derived from Canadian X Chinese Crosses to Mine for Unique Seed-Yield Alleles
Author: Jagoda Arachchige, Chanditha Sarith Priyanatha
Department: Department of Plant Agriculture
Program: Plant Agriculture
Advisor: Rajcan, Istvan
Abstract: The phenotypic and genotypic evaluation of exotic soybean [(Glycine max (L.) Merr.] germplasm could help widen the North American germplasm pool. The objective of this thesis was to identify novel alleles underlying seed yield, seed protein and oil concentration from a genomic diversity panel consisting of recombinant inbred lines (RIL) derived from several generations of bi-parental crosses between elite Canadian x Chinese cultivars (CD-CH). A total of 200 genotypes were evaluated in the field at Elora and Woodstock, Ontario, in 2019 and 2020. For seed yield, the CD-CH genotypes yielded significantly more than the elite Canadian and Chinese genotypes. For oil and protein concentrations, the performance of CD-CH group was similar to that of elite Canadian cultivars. A putative candidate gene was identified for each of the evaluated traits. Elucidation of the genetics underlying seed yield and seed quality traits from exotic germplasm sources would greatly benefit future breeders in their efforts for continued improvement of the crop.
URI: https://hdl.handle.net/10214/26241
Date: 2021-08
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