Abstract: It has gradually become obvious that the fertility alteration of photo-sensitive genic male-sterile rice (PGMR) is simultaneously regulated by both photoperiod and temperature, and there exists a temperature range of photoperiod sensitivity, only within which is the pollen fertility alteration of PGMR regulated by photoperiod. And results suggested that the stage from secondary rachis-branch and spikelet primordia differentiation to pollen mother cell formation in the process of panicle development is the photoperiod sensitive stage of fertility alteration induced. During this stage, long-day conditions induce pollen sterility and short-day conditions induce its fertility under a certain temperature regime. The critical light length is 13.75-14.00 h/d and critical light intensity is 5-50 lux in Nongken 58S. The twilight can affect the inducement of fertility, too. The induction stage of thermo-sensitivity of fertility alteration are different between PGMR and thermosensitive male-sterile rice (TGMR). During this stage, lower temperature conditions cause pollen fertility and high temperaure conditions cause it sterility. The critical values vary as the gene transfered into different varieties. According to the results, the current sterile lines fall into 4 photo-thermo-types. The adaptabilities of them are different.

Key words: Ecological adaptability, Fertility alteration, Photo-thermo-reaction model, Photo-sensitive genic male sterile rice

摘要： 本文系统介绍了诱导光敏核不育水稻育性转换的光温作用模式的内容和意义,认为光敏核不育水稻育性转换的光周期诱导,只能在一定的温度范围内才存在。讨论了诱导光敏核不育水稻育性转换的光周期敏感期、光照长度、光照强度及曙暮光影响、光期暗期与光质的影响,分析了温度的作用、温度影响的敏感期与温度分解因子的影响;并对现有不育系的生态类型和适应性作了初步分析。

关键词: 水稻, 育性, 生态学, 适应性, 光温敏核不育