The cytology of the microsporogenesis and development of anther wall of cytoplasmic male-sterile (CMS) A2, A4 and its maintainer lines B2, B4 was studied.

• 研究了萝卜胞质雄性不育系A_2、A_4及其相应保持系B_2、B_4的小孢子发生与花药壁发育的细胞学特征。