光温敏核不育系的不育性受温度影响而波动是困扰两系法杂交水稻的一个重要问题 ,就怎样解决这一问题提出了看法。从育种途径上来看 ,可以采用选育低不育临界温度的光敏核不育系、选育抗除草剂的恢复系、选育对除草剂敏感的光温敏核不育系和选育四环素诱导不育的光温敏核不育系来保证杂种纯度。从制种技术措施上来看 ,必须严格遵守光温敏核不育系核心种子生产程序、选择适宜的制种地区和季节、在盛夏低温来临时采取灌水保温措施 Photoperiod-temperature-sensitive genic male sterility (CMS) is affected by temperature and fluctuates. It is an important issue that confounds two-line hybrid rice and puts forward some suggestions on how to solve this problem. From the point of view of breeding, we can use the photo-sensitive genic male sterile line to select the critical temperature of low-fertility, select the restorer line to resist the herbicide, select the thermo-sensitive genic male sterile line sensitive to herbicide and select the tetracycline to induce Sterile thermo-sensitive genic male sterile line to ensure hybrid purity. From the technical point of view of seed production, we must strictly comply with the photo-thermo-sensitive genic male sterile core seed production process, select the appropriate seed production areas and seasons, in the mid-summer to take temporary measures to protect the low temperature