英语语法分析

There are two ways in utilization of heterosis in rapeseed.

油菜杂种优势利用途径主要有三系法和两系法。

This heterosis could be predicted by the resistance of their parents.

这种优势可依亲本的抗性进行预测。

Heterosis and segregation on agronomic and yield traits in brassica napus l.

甘蓝型油菜主要农艺和产量性状的杂种优势及其分离世代的分析。