水稻籼型核不育系培矮 64S、GD -1S、GD -2S和N2 5S对光周期反应特性的研究结果表明 ,在春夏季的不同光周期处理下 ,N2 5S既表现出第一光周期反应、又表现第二光周期反应特性 ;GD -1S仅表现第一光周期反应 ,而培矮 64S和GD -2S均不显示两个光周期反应特征 ;在秋冬季温室较低温条件下 ,培矮 64S的两个光周期反应均有表达 ,说明两个光周期反应表达所需的条件是不完全一致的。一般而言 ,低温下的光周期反应明显 ,高温下的光周期反应较弱 ,甚至不能表达 The results of photoperiodic response of indica type CMS lines Pei’ai 64S, GD-1S, GD-2S and N2 5S showed that under different photoperiod treatments in spring and summer, N2 5S showed both the first photoperiod Reaction, but also showed the second photoperiodic response characteristics; GD -1S only showed the first photoperiodic response, while Peiai 64S and GD -2S did not show two photoperiodic response characteristics; in the autumn and winter greenhouse at lower temperatures, The two photoperiod responses of the short 64S were both expressed, indicating that the conditions required for the two photoperiodic responses were not exactly the same. In general, the photoperiod reaction at low temperature is obvious, the photoperiod reaction at a high temperature is weak, and even can not be expressed