论文部分内容阅读
fon6是在籼稻恢复系乐恢188/明恢62杂交F3代发现的花器官数目突变体,表型分析结果表明:该突变体小花颖壳畸形扭曲、内颖长于外颖不闭合;每朵小花内外颖壳总数目2～4片;雄蕊数目为1～14枚;雌蕊数目增加,子房数目2～6个,胚囊畸形。突变体套袋自交结实率为14.06%,花粉活力较高,平均花粉可染率为91.86%。自交种子能正常萌发成苗,突变性状表现稳定的遗传特性。以突变体为父本分别与蜀恢527、明恢63杂交,F2代群体中正常株与突变株的分离均符合3∶1的比例,F3代及BC1F2代进一步的观察与统计结果均表明,该突变性状受1对隐性核基因控制,将该突变基因暂定名为fon6(floral organ number6)。
fon6 is a floral organ number mutant found in the F3 generation of the indica restorer line Yuehui 188 / Minghui62. The phenotypic analysis showed that the mutant had a deformed malformation, Inside and outside the total number of 2 to 4 pieces of glume; stamens number from 1 to 14; the number of pistils increased, the number of ovary 2 to 6 embryo sac malformations. The selfing rate of seedling was 14.06% and the pollen viability was higher. The average rate of pollen dyeing was 91.86%. Inbred seeds can germinate normally, and the mutated traits show stable genetic characteristics. Mutants were used as male parents to hybridize with Shuhui 527 and Minghui 63, respectively. The segregation of normal and mutant strains in F2 population were in accordance with the ratio of 3: 1. Further observation and statistical analysis of F3 generation and BC1F2 generation showed that, The mutant trait is controlled by a pair of recessive nuclear genes, and the mutant gene is tentatively named fon6 (floral organ number 6).