大白菜(结球白菜)在我国北方和长江流域各地均有栽培,也是成都秋冬季的主菜之一。它的杂种优势十分明显,但由于它是雌雄同花的异花授粉植物,靠用人工去雄杂交来获得大量杂交种子是很困难的,因此,要在生产上广泛利用杂种一代,就必须解决简易制种的问题。为此,我们从1972年开始进行雄性不育系的选育,经过五年时间,选育出了高不育株率的“二平桩”雄不育系,并在此基础上, Chinese cabbage (cabbage) in northern China and the Yangtze River Basin have cultivated all over, but also one of the main courses in autumn and winter in Chengdu. Its heterosis is obvious, but since it is a monoecious cross-pollinated plant, it is difficult to obtain a large number of hybrid seeds by artificial mating, therefore it is necessary to make extensive use of the hybrid generation in production Simple seed production problems. To this end, we began breeding male sterile lines in 1972. After five years, we have bred “two-piling” male sterility lines with high infertility rate. On this basis,