超级杂交稻协优9308恢复系落粒性的诱变改良

Improvement of Shedding Habit of Restorer Line for Super Hybrid Rice Xieyou 9308

通过γ射线诱变恢复系T93 0 8干种子筛选到了难落粒突变体M93 0 8。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 ,M93 0

To solve the easy shedding habit of super hybrid rice Xieyou 9308, the dry see ds 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 diseas e resistance were found between the mutant M9308 and the original parent T9308 a nd their F 1 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.