四、雄性不育性的细胞学研究 Cytological MM of male sterility 显微结构的变化Structural study ● O雄蕊群发育异常Abnormality in the development of stamen 极端类型，无花药或花药严重缺陷N0 anther or anther abort 24 24 四、雄性不育性的细胞学研究 Cytological MM of male sterility ●显微结构的变化 Structural study ○雄蕊群发育异常 Abnormality in the development of stamen 极端类型，无花药或花药严重缺陷 No anther or anther abort