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Integrating Genetics and Genomics to Advance Soybean Research

Reference Report for SoyBase9198921
Title:Genetic analysis of soybean resistance to stinkbug
Authors:Souza, R.F., Toledo, J.F.F.
Source:Bra. J. Genetics, 18(4):593-598
Abstract:Genetic mechanisms controlling the characters yield, healthy seed weight (HSW), percentage of healthy seeds (PHS) and leaf retention (LR) were studied in crosses involving the commercial cultivars Davis, BR-13 and Lancer and the breeding lines IAC 74-2832 and IAC 78-2318, that are reported to carry insect resistance genes. These materials and their segregating F-2 and F-4 generations were evaluated in the field, under insect (Nezara viridula, Piezodorus guildinii and Euchistus heros - Pentatomidae) pressure. Line IAC 74-2832 was the most resistant. The genetic models fitted to the means of the generations indicated the presence of additive, dominance and epistatic effects. The variance analyses indicated a predominance of additive effects, but also revealed the presence of linkage and genotype times microenviromental interaction. The breeding potential analyses indicated that it is possible to obtain high yielding resistant lines from Lancer times IAC 74-2832 and Davis times IAC 74-2832 crosses.






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