It can be applied to the screening of quality breeding materials in early generations in rapeseed quality breeding program.
特别适用于油菜品质育种低芥酸早期世代材料的筛选。
In the early generations the selection should not be too strict, and 15% selection intensity was suitable in F2 generation, but 10% was suitable in F3 and F4.
早期世代蛋白质含量的选择强度不宜太大，F2代的选择率以15%为宜，而F3和F4代的选择率以10%为宜。
The transovarial virus in 1st and 4th generations of congenital viruliferous insects can cause the second infection on early and late rice respectively.
第1、4代经卵带毒虫，还能分别引起早、晚稻再次侵染。 以早栽双季晚稻和杂交晚稻发病最重，其主要感染期是在本田初期。
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