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在田间自然虫源条件下，大豆对食叶性害虫综合抗性的遗传表现为一对主基因＋ 多基因的遗传模式，抗性表现为显性。Ｆ２ 群体与Ｆ２：３ 家系抗虫性分离相当明显，根据Ｆ２·３ 家系估计的主基因遗传率比根据Ｆ２ 群体估计的主基因遗传率要高，分别是６５．３８％ 和４８．１９％ 。对Ｆ２ 个体和Ｆ２·３ 家系的主基因基因型分类作了估计。
In the field of natural sources of insects, soybean genetic resistance to leaf-pests comprehensive genetic resistance as a major gene + polygene genetic model, the resistance showed dominant. The segregation of insect resistance in F2 population and F2: 3 family was quite obvious. The heritability of major genes estimated by F2 · 3 pedigree was higher than that estimated by F2 population, which were 65.38% and 48.19% respectively. The main genotypes of F2 individuals and F2.3 families were estimated.