论文部分内容阅读
在人工控制条件下研究了光照时间和温度对农垦58S及以此为基因源转育的其他粳型光敏不育系育性的影响。结果表明,供试粳型光敏不育系的育性受光照时间和温度的双重影响,在15.0h光长与29.6℃平均温度(最高与最低温度分别为33.0℃与28.0℃)的长光照高温条件下,自交结实率为0或接近于0;在12.0h光长与23.6℃平均温度(27.0/22.0℃)的短光照低温条件下,自交结实率较高;在长光低温(15.0h/23.6℃)和短光高温(12.0h/29.6℃)下,育性出现不同程度的转变。不同材料的育性对光温反应存在着差异,提示遗传背景对育性表达可能有重要作用。本研究结果有助于对自然条件下光敏不育系夏季制种纯度不高而秋季警种产量又较低的现象在理论上给予合理的解释。
The effects of illumination time and temperature on the fertility of Nongken 58S and other japonica CMS lines which were genetically transplanted under the artificial control conditions were studied. The results showed that the fertility of photoperiod-sensitive CMS lines was affected by both light time and temperature. Under the conditions of 15.0 h light length and 29.6 ℃ average temperature (the highest and lowest temperatures were 33.0 ℃ and 28.0 ℃, respectively) Under the conditions of short photoperiod of 12.0h light and average temperature of 23.6 ℃ (27.0 / 22.0 ℃), selfing seed setting rate was higher; in the long light low temperature (15.0 h / 23.6 ℃) and short light and high temperature (12.0h / 29.6 ℃), fertility changes in varying degrees. Different materials have different fertility responses to light and temperature, suggesting that genetic background may play an important role in fertility. The results of this study contribute to a reasonable explanation of the phenomenon that the photosynthetic male-sterile lines under natural conditions have a low purity in summer and low yields in autumn.