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[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 is 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 lower than 19 ℃ and presented partial fertility when the mean of daily temperature at fertility sensitive stage lower than 20-22 ℃. Photoperiod to some extent affects the male fertility of Vtai911289a,long-day 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.
[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 is 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 lower than 19 ° C and presented partial fertility when the mean of daily temperature at fertility sensitive stage lower than 20-22 ° C. Photoperiod to some extent affects the male fertility of Vtai911289a, long-day 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.