摘要
青花菜（ Ｂ． ｏｌｅｒａｃｅａ ｖａｒ．ｉｔａｌｉｃａ） 具有广泛的自交不亲和性，随着自交代数的增加，通过选择花期自交亲和指数迅速下降，３ 代后渐趋稳定。系内株高、分枝数、花蕾粗细、球茎髓部空实度、花瓣颜色等性状在自交３ ～４ 代后趋于一致。花球成熟期自交４ 代尚难稳定。球径与球高比值在世代间变化不大。花球大小、蕾期亲和指数、生长势等方面表现明显的自交衰退。
Self compatible index (number of seeds per pollinated flower) in Broccoli ( B. oleracea var. italica) decreased rapidly and became stable after 3rd generation. Plant height,branch number,bud size,stem pith and flower colour within line exhibited uniform after 3～4 generations. Days to head maturity were unstable even after 4th generation. Ratio of head diameter to head height keeped unchanged among generations. Head volume,index of bud self compatibility and plant growth vigor exhibited significant inbreeding depression.
出处
《中国蔬菜》
北大核心
1999年第6期9-11,共3页
China Vegetables
关键词
青花菜
自交
不稳定指数
遗传
Broccoli, Self pollination, Agronomic character
