Fertility was sensitive to temperature in the forth young panicle development stage i.e. fertility was sensitive lo temperature from stamen and pistil formation stage to pollen mother cell stage.

• 育性温度敏感期为幼穗分化第四期(雌雄蕊形成期至花粉母细胞形成期);在相同低温的条件下,短日处理的光温敏核不育系的不育度大大降低。