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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）。
The effects of 384A and 217A on two cytoplasmic male sterile lines, including maintainer line, restorer line, hybrid F1, F2 and aBC1 (CMS × hybrid F1), bBC1 (hybrid F1 × maintainer) Observation and analysis of plant fertility, initially identified 384A, 217A are sterile spores. Male sterility is a result of the interaction between the sterile gene in the cytoplasm and the recessive gene in the nucleus. 384A has a pair of recessive nuclear genes, 217A has two pairs of recessive nuclear genes, and a pair of recessive male sterility genes of 384A does not have an allelic relationship with any pair of recessive nuclear genes of 217A . The genotype of 384A was S (r1r1) and the genotype of 217A was S (r2r2r3r3).