Abstract: This study employed the soybean Recombinant Inbred Lines(RIL) which involved 133 lines from Wan82-178×Tongshanbopihuangdoujia as experimental materials. Larval weight of cotton worm (Prodenia litura (L.) Fabricius) was examined in as index of resistance. The inheritance of soybean resistance to cotton worm was estimated by major gene plus polygene mixed model, the result indicated that resistance was controlled by two major genes plus polygene, and the heritability value of major genes is 89.85%. Based on the linkage map constructed with SSR markers of this RIL population, two QTLs related to the trait were mapped on linkage group wt-11 and wt-12, and the position were 5.51cM and 11.51cM, respectively. The QTLs’ additive effects were –0.0619 and –0.0419 and explained 17.22％ and 8.60％ of the total variation of the larval weight, respectively.

Key words: Soybean Insect Resistance, Cotton worm, Inheritance Analysis, QTLs mapping