大白菜CMS96细胞质雄性不育系的特点分析

Characteristics of Chinese Cabbage Cytoplasmic Male Sterile CMS96

为了筛选和利用大白菜细胞质雄性不育系,对大白菜的3种细胞质雄性不育系:CMS96细胞质雄性不育 系、波里马细胞质雄性不育系(Pol-CMS)和萝卜细胞质雄性不育系(Ogu-CMS)及其相应的保持系进行了主要植物 学性状的比较研究。结果表明:Ogu-CMS存在多代转育后植株长势退化、杂交优势差,Pol-CMS存在育性受环境 条件影响等缺点,而CMS96细胞质雄性不育系则克服了二者的缺点。另外,CMS96细胞质雄性不育系早期的晚抽薹 性比保持系强、杂交种子的产量比保持系杂交种子产量高。CMS96细胞质雄性不育系不仅不育性稳定,多代回交不 退化,而且杂交优势强,繁种产量高,表现出了广阔的育种应用前景。

Leaf head of Chinese cabbage (Brassica campestris L. ssp. pekinensis) is the main harvesting organ, therefore cytoplasmic male sterility is an effective method in breeding varieties. In order to select and utilize cytoplasmic male sterile type in Chinese cabbage, 3 cytoplasmic male sterile types of Chinese cabbage: Ogu - CMS, Pol - CMS and CMS 96 were compared with their maintenance lines on main biological characteristics in this article. Results showed that Ogu- CMS was decreased accompanying to the multi-backcrossing, and had less combination ability; Pol - CMS was affected by environmental factors. While CMS96 was a new cytoplasmic male sterile type, it was the best among three CMS materials. CMS96 was not only better than maintenance lines in late-bolting at the early backcrossing stage, and produced higher quantity in propagation but also was stable in male sterility and no decrement with multi-backcrossing, and had better combination ability. Therefore CMS96 showed wide application on breeding new varieties of Chinese cabbage in the future.