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在人工气候室长日低温（昼／夜：２４℃／２０℃，光长１４．５ｈ）和武汉自然短日高温条件下，分别研究了７个光温敏不育系育性临界温度。结果表明，供试光温敏不育系对低温敏感期大致为雌雄蕊形成期至花粉母细胞减数分裂期，以套袋结实率为指标时，长日不育的下限温度次序为Ｗ６１５４ｓ＞Ｗ７４１５ｓ，Ｎ５８ｓ＞３３００１ｓ，Ｎ５０４７ｓ，３１１１１ｓ，Ｎ５０８８ｓ；在武汉秋季自然短日高温条件下，粳型光敏不育系Ｎ５８ｓ，３３００１ｓ，Ｎ５０８８ｓ和Ｎ５０４７ｓ的套袋结实率与抽穗前２０～１０ｄ的日均温呈显著负相关，３１１１１ｓ的套袋结实率也与其抽穗前１５～５ｄ的日均温呈显著负相关，短日可育上限日均温范围为２８．７６～３２．３８℃，各品种次序为３３００１ｓ＞Ｎ５０８８ｓ＞Ｎ５０４７ｓ＞Ｎ５８ｓ＞３１１１１ｓ。
The critical temperature of fertility of 7 thermo-photo-thermo sensitive genic male sterile lines were studied under the conditions of long day low temperature (day / night: 24 ℃ / 20 ℃, light length 14.5h) and natural short day and high temperature in Wuhan. The results showed that the light temperature-sensitive genic male sterile lines had the lowest temperature sequence of long-day sterility for the period from the formation of pistils to the meiosis stage of pollen mother cells and the setting of bagging percentage. The order of W6154s> W7415s, N58s> 33001s, N5047s, 31111s and N5088s. Under the conditions of natural short-day and high-temperature in autumn in Wuhan, the seed setting rate of japonica CMS lines N58s, 33001s, N5088s and N5047s was significantly higher than that of 20-60 days before heading There was a significant negative correlation between the yield of 31111s and the daily average temperature of 15-5 days before heading. The maximum daily average temperature range of short day fertility was 28.76 ~ 32.38 ℃, and the order of the varieties was 33001s> N5088s> N5047s> N58s> 31111s.