摘要： 通过对384A、217A两个甘蓝型双低油菜细胞质不育系及其保持系、恢复系、杂种F1、F2及aBC1（不育系×杂种F1）、bBC1（杂种F1×保持系）等群体中植株的育性观察和分析，初步查明384A、217A均属孢子体不育。雄性不育性是由细胞质中的不育基因和细胞核中的隐性基因相互作用的结果。384A具有一对隐性不育核基因，217A具有两对隐性不育核基因，且384A的一对隐性核不育基因与217A的任何一对隐性不育核基因不存在等位关系。384A的基因型为S（r1r1）,217A的基因型为S（r2r2r3r3）.

关键词: 甘蓝型油菜, 细胞质雄性不育性, 基因分析

Abstract: In the study the characters of the A,B and C lines,and hybrids F1,F2,aBC1,(male sterile line×hybrid F1),bBC1 (hybrid F1 × maintainer line)of the two double low cytoplasmic male sterile line in Brassica napus L.were observed and analysed.It has been found that the male sterility of 384A and 217A belongs to the sporophytic sterile type,and their male sterility is derived from the interaction of a cytoplasmic sterile gene with recessive nucleus genes.It has also been found that 384A has a pair of recessive nucleus genes,and 217A has two pairs of recessive nucleus genes.There were no equipotent genes between the two CMS lines.The genotypes of the two CMS lines are S(r1r1)for the 384A male sterile line,S(r2r2r3r3) for the 217A male sterile line.

Key words: Brassica napus L., Cytoplasmic male sterile, Genetic analysis

中图分类号: 

• S565.4

• S634.303