But in F2generation group, the resistant ability was apparent separated.
而在F2代群体中，抗性出现明显分离。
2
The F2generation of soybean was a generation with abundant genetic variations.
大豆F_2代是遗传变异最丰富的世代。
3
In the early generations the selection should not be too strict, and 15% selection intensity was suitable in F2generation, but 10% was suitable in F3 and F4.