Combining the null Kunitz trypsin inhibitor and yellow mosaic disease resistance in soybean (Glycine max (L.) Merrill)

Abstract

For the wide adoption of soybean varieties, it is desirable, that they are Kunitz trypsin inhibitor (Kti) free and resistant to yellow mosaic disease (YMD). The soybean variety SL525 with YMD resistance was crossed with the YMD susceptible variety NRC101 with a null kti allele. The F₅progeny derived from the cross was screened with two simple sequence repeat (SSR) markers (satt409 and satt322) linked with the null kti allele and the YMD resistance, respectively, and one null kti allele-specific marker. The presence of both desirable traits was further confirmed with the phenotypic data which showed good correlation with the genotypic data. The yield potential of fourteen such identified genotypes having both desirable traits was either at par or superior to SL525, hence, represent improved versions of SL 525.