短光低温不育水稻不育性的遗传观察

GENETIC OBSERVATION ON THE STERILITY OF SHORT PHOTOPERIOD AND LOW TEMPERATUREINDUCED MALE STERILE RICE

用若干常规品种与短光低温不育水稻宜ＤＩＳ配组，考察双亲及Ｆ１在自然低温影响前后的花粉育性，并于不育系稳定不育期间调查Ｆ２及Ｆ３的育性分离。结果表明：（１）低温是影响双亲及Ｆ１育性稳定性的重要生态因子；（２）Ｆ１的育性稳定性除与父本的育性稳定性有关外，可能尚与其他因素有关，这种育性稳定性表现是由可遗传因子决定的；（３）短光低温不育特性基本上符合２对独立主基因控制的遗传模式，但可能尚受到众多微效基因的作用，与这２对基因相对应的２对恢复基因的遗传效应可能存在差异。

A short photoperiod and low temperature-induced male sterile rice Yi-DIS was crossed With some rice varieties to examine the pollen fertility of parents and F1 under natural low temperature, and to investigate the fertility segregation of F2 and F3 during stable phase in sterile line. The results showed that the stability of fertility in parents and F1 was affected to a certain extent by low temperature. Besides the sensitivity of male parent to low temperature, pollen fertility in F1 was also related to some other factors, and the fertility stability in FI might result from heredity. The characteristics of male sterile Yi-DIS basically accorded with genetic mode controlled by two pairs of independent major genes, and was affected probably by many minor genes. It seems that the two pairs of restoring genes corresponding to this two pairs of major genes were different in genetic effect.