中文摘要：

以不结球白菜抗小菜蛾材料508为母本（P1）、以感虫材料114为父本（P2）构建了包括P1、P2、F1、F2、BC1P1和BC1P2的6个世代群体,通过人工网室鉴定各世代群体的抗虫性,利用主基因＋多基因混合遗传模型联合分析法分析了不结球白菜抗虫遗传规律。结果表明：在508×114组合中,感虫对抗虫表现部分显性,抗虫性遗传符合一对加性-显性主基因＋加性-显性多基因遗传模型,在BC1P1、BC1P2和F2群体中的主基因遗传率分别为57.21%、25.87%和76.05%,为有效利用抗虫资源和挖掘抗虫基因奠定了基础。

英文摘要：

Insect-resistant inbred line 508 of the non-heading Chinese cabbage（Brassica chinensis L.）as female parent and susceptible inbred line 114 as male parent were used to construct six generation populations of P1、P2、F1、BC1P1、BC1P2 and F2.The resistances of all the populations to diamondback moth（DBM）were evaluated in net,and the inheritance of insect-resistance for six generations was analyzed by joint analysis method.The results showed that the insect-resistance was partly recessive in the combination of 508×114 and fitted to the D-1genetic model which is one pair of major additive-dominant gene plus additive-dominant polygene＇s.The heritability of the major genes in BC1P1,BC1P2 and F2populations were 57.21%,25.87% and 76.05%,respectively.The results will be helpful for us to effectively utilize the insect-resistant gene resources in insect-resistance breeding.