Plant Cell Environ 35(1):38–52Īrahana VS, Graef GL, Specht JE, Steadman JR, Eskridge KM (2001) Identification of QTLs for resistance to in soybean.

These results may provide a profound understanding of the genetic basis for resistance to CCW in soybean and the foundation for resistance to biotic stress through marker-assisted selection breeding strategies for CCW.Īinsworth EA, Yendrek CR, Skoneczka JA, Long SP (2012) Accelerating yield potential in soybean: potential targets for biotechnological improvement. These markers, located in previously reported QTLs, are consistent with previous findings and may represent important targets for the identification of CCW resistance-related genes. Two putative genes ( MYC2-like and JAM2-like) on chromosome 7 that may be associated with resistance to CCW were identified. On chromosome 7, two SNPs have been reported to associate with CCW, corn earworms, soybean aphid and bean pyralid moth infestations. The region on chromosome 6, which co-associated with LW and DLS, included several QTLs for reaction to disease or insect, such as Fusarium virguliforme, corn earworm and bean pyralid. Most of the detected loci were located within genomic regions previously identified as quantitative trait loci (QTLs) for these traits. Three loci were significantly associated with CCW-resistance. Four SNPs were co-associated with two traits. Seven SNP-trait associations were identified using a mixed linear model (MLM). Using 1536 single nucleotide polymorphisms (SNPs), a genome-wide association analysis was conducted to identify genomic regions associated with LW, DLS and PW in this natural population. Three traits, namely larval weight (LW), duration of larval stage (DLS) and pupal weight (PW) were evaluated as indicators for CCW resistance.

In this study, one natural population consisting of 219 soybean landraces from a wide geographic range was employed.

The purpose of this study was to explore the genetic mechanisms underlying resistance to CCW. Understanding CCW-associated traits in soybean will provide insights for improved breeding strategies for resistance. Common cutworm (CCW Spodoptera litura Fabricius) is a major leaf-eating insect that affects soybean crops in central and southern China.

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