选育和推广大白菜一代杂种是实现大白菜优质高产的有效途径之一.六十年代初,我所开始选育大白菜一代杂种,在进行自交不亲和系选育的同时,将自交亲和指数较高、园艺性状优良的自交系用于杂交制种,先后育成了“青杂早丰”、“青杂中丰”、“青杂4号”和“青杂5号”等一代杂种,杂种株率都在95%以上.为探讨利用自交系配制一代杂种的规律性,从1971年开始,结 Breeding and promotion of hybrid Chinese cabbage is one of the effective ways to achieve high quality and high yield of Chinese cabbage.First of the sixties, I began to breed a generation of Chinese cabbage hybrids in the self-incompatibility of breeding at the same time, since Inbred lines with higher parental index and good horticultural traits were used for hybrid seed production, and breeding lines of “Zaoshoufengfeng”, “Qingzhongzhongfeng”, “Qingza4” “Qingza 5 ” and other generation hybrids, the rate of hybrids are more than 95% .In order to explore the use of inbred lines to formulate the first-generation hybrids, from 1971 onwards, knot