粳稻孕穗期耐冷基因突变体02428c的遗传研究

GENETIC ANALYSIS OF Japonica MUTANT “02428c" WITH COLD TOLERANT GENE AT BOOTING STAGE

孕穗期耐冷性极弱的广亲和粳稻 0 2 4 2 8种子经 30 0Gy的γ射线处理 ,在M2 代群体中选育出孕穗期耐冷基因突变体 ,经M3 ～M6多代种植性状均稳定 ,至M6命名为 0 2 4 2 8c ;0 2 4 2 8c的结实率比 0 2 4 2 8高 72 34% ,即孕穗期耐冷性较强。遗传分析表明 ,0 2 4 2 8c的孕穗期耐冷性受1对显性基因控制。

Cold tolerant mutant at booting stage was developed from population M_2 generation after the dry seeds of a wide compatibility Japonica rice 02428 were irradiated with 300Gy of 60Co γ-ray. Seed setting rate of the mutant was characterized by stronger cold tolerance, and the cold tolerance did not turn weak under low temperature from M_3 to M_6.The mutant was named “02428c' at M_6. Compared with the parent variety 02428, the seed setting rate of the mutant was 72.34% higher, showing stronger cold tolerance. Genetic analysis revealed that cold tolerance of 02428c was controlled by one single dominant gene.=