Abstract: To solve the easy shedding habit of super hybrid rice Xieyou 9308, the dry seeds of restorer T9308 was treated by gamma irradiation, and one elite mutant M930 8 with difficult shedding habit was obtained. Except for the shedding habit, no significant differences in the major agronomic traits, grain quality, and disease resistance were found between the mutant M9308 and the original parent T9308 and their F₁ hybrids derived from Xieqingzao A with them. Genetic analys is indicated that the difficult shedding habit of mutant M9308 was controlled by a single recessive gene.

Key words: super hybrid rice, mutant, shedding habit, inheritance

摘要： 通过γ射线诱变恢复系T9308干种子筛选到了难落粒突变体M9308。除落粒性外，突变体及其与不育系协青早A配制的杂种F1的主要农艺性状、稻米品质和抗病性无显著变化。遗传研究表明，M9308的难落粒性受单隐性基因控制

关键词: 超级杂交水稻, 突变体, 落粒性