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Poster: Biology & Disease Mgmt: Genetics of Resistance


Genome-wide association study oF transmission of Soybean mosaic virus through seed
Q. Liu (1), H. Hobbs (1), L. Domier (2) (1) University of Illinois, U.S.A.; (2) USDA-ARS, University of Illinois, U.S.A.

Soybean mosaic virus (SMV), an aphid- and seed-transmitted member of the Potyviridae, causes significant reductions in soybean yield and seed quality worldwide. In North America, seedborne infections serve as the primary sources of inoculum for SMV infections. Therefore, host-plant resistance to seed transmission of SMV provides a means to limit the impact of SMV on soybean production. In this study, populations of 200 and 477 plant introductions from the United States Department of Agriculture Soybean Germplasm Collection were evaluated for their transmission of SMV through seed. To identify loci associated with resistance to SMV seed transmission, the phenotypic data and single nucleotide polymorphism (SNP) information for each line from the SoySNP50K resource were combined and analyzed using a compressed mixed linear model as implemented in the GAPIT package in R. The loci identified were compared to the results from previous biparental mapping studies of resistance to SMV seed transmission. This study provides a comprehensive analysis of loci associated with seed transmission of an economically important plant virus.