波里马（Pol.CMS）胞质雄性不育＋显性细胞核雄性不育系的选育

甘蓝型油菜显型细胞核雄性不育与波里马细胞抟雄性不育具有不同的不育基因系统；采用有性杂我和连续回交的方法，将甘蓝型油菜显性细胞核不育基因导入到含有波里马不育胞质的材料中，初步得到了显性细胞核＋细胞质不育系。讨论了新不育系的遗传组成及在油菜杂种优势利用和机理研究方面的重要作用。

A PRELIMINARY REPORT OF THE BREEDING OF A DOMINANT GENIC CYTOPLASMIC MALE STERILE LINE IN RAPESEED (BRASSICA NAPUS)

By means of sexual cross followed by successive backcrosses between a dominant genic male sterile genotype and the polima cytoplasmic male sterile line,the dominant gene for genic male sterility in rape (Brassica napus L.) was incorporated into a genotype with the polima cytoplasmic male sterility, resulting in a dominant genic cytoplasmic male sterile line.The genetic constitution of the new male sterile line and its significance in the utilizaion of heterosis and the study of its mechanism are discussed.