温光条件对胞质不育系V太911289a雄性育性影响的初步研究

目的]研究温光条件对小麦胞质不育系V太911289a雄性育性的影响,探讨胞质不育系雄性育性的转换机制。方法]于2003~2005年在湛江进行了分期播种试验和人工定温定光试验。结果]在一定的温光条件下,胞质不育系V太911289a的雄性育性可以发生转换。温度是影响其自交种雄性育性的主要原因之一。当育性敏感期日平均温度低于19℃时,表现稳定不育;日平均温度为20~22℃时,则表现部分可育。光照时间是对其雄性育性也有一定的影响,长日照利于雄性发育。结论]胞质不育系用于生产杂交种安全性远高于温敏不育系。

Preliminary Studies on the Effect of Photoperiod and Temperature on Male Fertility of a Cytoplasmic Male Sterile Line in Wheat

Objective] The study aimed to reveal the effect of photoperiod and temperature on male fertility of cytoplasmic male sterile line Vtai911289a in wheat and discuss the mechanism of male fertility alteration.Method] The sowing-date tests and designed conditions were conducted during 2003-2005.Result] Fertility of Vtai911289acould alter under specific photoperiod and temperature conditions.Temperature was one of the main factors influencing male fertility of the male sterile lines.Vtai911289a showed stable sterility under the condition of the mean of daily temperature at fertility sensitive stage was lower than 19 ℃ and presented partial fertility when the mean of daily temperature at fertility sensitive stage was lower than 20-22 ℃.Photoperiod to some extent affects the male fertility of Vtai911289a,longday condition is helpful for the male fertility of the sterile line.Conclusion] The application of photoperiod temperature-sensitive cytoplasmic male sterile line in production has a higher safety than that of temperature sensitive sterile line.