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