摘要： 对谷子Ch型显性雄性核不育花药发育的细胞形态学观察发现,其杂合株花粉发育正常,但开花时花药不开裂;纯合株自造孢细胞期到花粉积累淀粉时均有败育发生,但主要在小孢子期;杂合株的药室壁细胞药隔发育正常;纯合株的药室壁细胞药隔则发生各种异常,可以认为这是其雄性败育的原因.

关键词: 显性雄性核不育, 小孢子发生, 药隔维管束

Abstract: Anther development of Ch dominant male sterile plants in foxtail millet (Setaria italica Bev,)had been studied cytomorphologically，the obtained results are summarized as follows:the anther development of Ch heterozygotic plants was completely different from that of homozygotic plants, Anthers of heterozygotic plants can normally develop into mature pollen stage, but its chambers can't open because of without forming open space, Anthers of homo- zygotic plants could abort at every stage of its development; 1 .The degen- eration of sporogenous cells and pollen mother cells, 2 .The disorganization of microspores, .The abortion of pollen developing at late stage, But a few anther of homozygotic plants can normally form mature pollen, The vascular bundles and tapetal cells of aborted anther showed abnormal and disorganiza- tion,

Key words: Dominant GWS, Microsporogenesis, Vascular bundle