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United States Department of Agriculture

Agricultural Research Service

Research Project: REDUCING SOYBEAN YIELD LOSSES THROUGH GENETIC IMPROVEMENT Title: Reaction of current commerical soybean cultivars in the mid-southern US to Soybean mosaic virus (SMV)

Authors
item Shakiba, Ehsan -
item Chen, Pengyin -
item Gergerich, Rose -
item Li, Shuxian
item Dombek, Donald -
item Brye, Kris -
item Shi, Ainong -

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: January 22, 2012
Publication Date: September 1, 2013
Citation: Shakiba, E., Chen, P., Gergerich, R., Li, S., Dombek, D., Brye, K., Shi, A. 2013. Reaction of current commerical soybean cultivars in the mid-southern US to Soybean mosaic virus (SMV). Crop Science. 52 (5):1990-1997.

Interpretive Summary: Soybean mosaic virus (SMV) is one of the most important viral diseases of soybean, causing drastic reductions of seed yield and quality. A total of 303 cultivars currently grown in the mid-southern U.S. were evaluated for their reactions to six SMV strains to deduce resistance genes present in them. The results showed 190 cultivars were susceptible to all six viral strains, thus carrying no apparent resistance genes. Three cultivars were resistant to five viral strains but had a necrotic reaction to one strain; four cultivars were resistant to three viral strains and susceptible to three other strains. Two cultivars expressed resistance to all six strains. There were 34 cultivars that may carry new resistance genes. The results of this study will enable soybean breeders to select cultivars with SMV resistance for their breeding programs and will provide information to farmers for selection of resistant cultivars for production areas where SMV is a major disease threat.

Technical Abstract: Soybean mosaic virus (SMV) is one of the important viral diseases of soybean, causing drastic reductions of seed yield and quality. Seven SMV strains, G1 to G7, have been identified and three resistance loci, Rsv1, Rsv3, and Rsv4, have been reported in the U.S. A total of 303 cultivars currently grown in the mid-southern U.S. were evaluated in the greenhouse for their reactions to six SMV strains (G1, G2, G3, G5, G6, and G7) to deduce resistance genes present in them. The results demonstrated that 190 cultivars were susceptible (S) to all six SMV strains, carrying no resistance genes. Three cultivars were resistant (R) to G1, G2, G3, G5 and G6 but necrotic (N) to G7, presumably carrying Rsv1 alleles. Sixty-six cultivars were R to G1 through G3 but S to G5 through G7, and presumably they carry Rsv1-y. One cultivar, Dyna Gro 33X55 was R to G1 through G3 but N to G5 through G7, and thus it may carry Rsv1-k. Two cultivars likely carry Rsv1-t because they were R to G1, G2, G5, and G6 but N to G3 and G7; and another two cultivars may carry Rsv1-n because they were N to G1, G2, G5, and G6, but S to G2 and G7. Four cultivars were S to G1 to G3, and R to G5 through G7, and thus they may carry Rsv3. Two cultivars were R to all SMV strains, and thus they may carry Rsv4, Rsv1-h, or two gene combinations. There were 34 cultivars that may carry new genes or alleles, among which 23 may carry new alleles at Rsv1 locus and 11 cultivars may carry new alleles at Rsv3 locus. The results of this study will enable soybean breeders to select cultivars with SMV resistance for their breeding programs and will provide information to farmers for selection of resistant cultivars for production areas where SMV is a major disease threat.

Last Modified: 10/31/2014
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