parent grain的意思|示意

Breeding hybrid rice combination with high stability of grain yield needs at least one parent with higher GCA for stability.

选育稳产性好的杂交稻组合，至少应有一个稳产性配合力高的亲本。

These have performed as well as or better than their parent lines in terms of grain and straw yield, and possess a markedly improved resistance to downy mildew.

就谷物和产草量而言，新品种性能相当于或优于其母本品系，而且对霜霉病的抗性显著增强。