短光低温不育水稻不育性的遗传观察

GENETIC OBSERVATION ON THE STERILITY OFSHORT PHOTOPERIOD AND LOW TEMPERATURE- INDUCED MALE STERILE RICE

摘要:

用若干常规品种与短光低温不育水稻宜D1S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。

Abstract:

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 F₁ 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．