1 使用纯正的亲本用高纯度的亲本杂交制种,生产的杂种一代才具有较强的优势,表现出高产、优质、整齐一致,抗病性强。目前我国十字花科蔬菜杂交种绝大多数利用两个优良的自交不亲和系配制而成,此亲本原种一般是在严格的隔离条件下,用人工蕾期授粉或花期盐水处理蜜蜂传粉繁殖。原种纯度要求在99%以上,亲和指数要求甘蓝小于 1 using pure parents with high purity parental hybrid seed production hybrid generation has a strong advantage, showing high yield, high quality, neat and consistent, disease resistance. At present, most of cruciferous vegetable hybrids in our country are made by two excellent self-incompatibility lines. The parental parental plants are generally pollinated by artificial pollination or florescence under the condition of strict isolation. Breeding. Purity requirements of more than 99% of the original species, affinity index requirements less than cabbage