油菜育性基因在不同分离世代的分离特性研究

】推导出１对隐性核不育基因和３对隐性核不育基因在不同分离世代的理论分离比，然后以胞质不育系Ｌ１７Ａ和陕２Ａ、细胞核＋细胞质双重不育系ＧＣＤＡ－１的多个分离世代为材料，采用卡平方适合性测验方法验算了它们所带的育性基因对数。结果表明，Ｌ１７Ａ和陕２Ａ为１对隐性不育基因控制，双重不育系由３对隐性不育基因所控制，但胞质不育基因ｓ１与两个核不育基因ｍ１ｍ２中的一个可能存在连锁关系。

STUDY ON THE CHARACTERIDTICS IN SEGREGATION OF THE STERILITY GENES IN DIFFERENT GENERATIONS OF BRASSIA NAPUS L

The theoretical segregation ratios in different segregating generations are inferred of a pair of recessive sterile genes from CMS lines and three pairs of recessive sterile genes from GMS CMS double sterility lines. Some segregarting generations of the CMS lines L17A and Shan 2A and the double sterile line GCDA-1 of rapeseed ( Brassica napus ) were used to estimate the number of sterility genes involved in the sterile lines with X 2 test. The results showed that a pair of sterile genes were present in L17A and Shan 2A and three pairs of recessive sterile genes in GCDA-1; however, linkage seemed to exist between the CMS gene s 1 and the GMS gene m 1 or m 2.