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云南属低纬度高海拔稻作区，气温平稳、年较差小，日长年变幅不大。可育临界温度为２３．５℃的培矮６４Ｓ低温敏型核不育系在云南有广泛的适宜制种区及繁殖区，是开发利用的重点。不育期光长范围宽，光、温互补作用强的光温敏型不育系Ｎ５０８８５、７００１Ｓ繁殖容易，在日长１４小时以上，日均温＞２４．５℃条件下可以稳定不育，在云南中、北部海拔１０００ｍ以下，能确保７月中旬以前抽穗的地区适宜制种，有一定的利用价值。高温敏型及典型光敏核不育系在云南没有实用性。
Yunnan is a region of low latitude and high altitude rice paddies, the temperature is stable, the annual difference is small, little change for many years. Fertile critical temperature of 23.5 ℃ Pei’ai 64S genic male sterile line in Yunnan has a wide range of suitable seed and breeding areas, is the focus of development and utilization. Photoperiod-sensitive genic male sterile line N50885,7001S, which has a wide range of light-duration and strong light and temperature complementation, is easy to reproduce. Under the condition of longer than 14 hours per day and average daily temperature> 24.5 ℃, In Yunnan, the northern elevation of 1000m below, to ensure that mid-July before heading for the appropriate species, have some use value. High temperature sensitive and typical photosensitive male sterile lines in Yunnan is not practical.