甘蓝型油菜胞质雄性不育系C MS22A的选育与遗传 I.双低不育系C MS22A的选育及其败育类型研究

甘蓝型双低油菜CMS2 2A是河南省农业科学院棉花油料作物研究所利用 384A中的雄性不育源、采用单株成对连续回交的方法育成的双低油菜细胞质雄性不育系。其突出表现为雄性不育彻底且遗传稳定 ,配合力高 ,抗病抗倒 ,品质优良。CMS2 2A属典型的败药型雄性不育系 ,雄蕊败育短缩至雌蕊基部 ,♂ /♀ <0 .5 ,花药退化变小、无花粉。雌蕊发育正常 ,花瓣虽变小皱缩 ,但花瓣开张正常 ,可以正常接受外来花粉、受精结实。不育率稳定保持在 99%以上。

Breeding and Genetic Analysis of Cytoplasmic Male Sterile Line CMS22A in Brassica napus L I.Breeding of Double Low Male Sterile Line CMS22A and the Study on Its Abortive Types

CMS22A was a double low cytoplasmic male sterile line in Brassica napus,bred in 1997 in Institute of Cotton & Oil Crops of Henan Academy of Agricultural Sciences. Its cytoplasmic male sterility was derived from CMS384A (a double-low cytoplasmic male sterile line). CMS22A belongs to typical anther spoilable sterile type,its anthers spoiled completely,♂/♀<0.5,its petals stretch normally, the male sterile was stable(over 99%). The cytoplasmic male sterile of CMS22A belongs to complete sterile type,and its male sterile is derived from the interaction of a cytoplasmic sterile gene with a pair of recessive nucleuc genes.Therefore,CMS22A has good stability on male sterility,high combining ability,good resistant to diseases and good quality in oil and meal.