Abstract: A rice spontaneous pistilliod-stamen mutant w as found in breeding. The mutant showed that lemma and palea were degenerated, 1 to 5 stamens had been turned into pistils or combo of stamen and pistil, and the female was high sterile. The same mutant could still be found in the fi fteenth generation of self-pollination and showed genetic stability. Genetic analysis indicated the mutant was controlled by single recessive gene.

Key words: rice, floral organ, pistilliod-stamen mutant, genet ic analysis

摘要： 在杂交育种后代中发现了一个水稻雄蕊雌蕊化突变体 ,表现为 :外颖和内颖变窄 ,外颖弯曲呈弯月形 ,内外颖不闭合 ,1～5枚雄蕊转变为雌蕊或雌蕊 雄蕊嵌合体。由于高度雌性不育 ,突变纯合体本身无繁殖保持功能 ,只能通过杂合体繁衍 ,在自交 15代后仍分离出完全相同的突变体 ,表现稳定遗传特性。遗传分析表明该突变体由单隐性基因控制。