对抗旱性不同的六个小麦品种,于齐穗后置40℃、45℃、50℃高处温理8小时。花期检查花粉败育率表明,随着温度升高,各品种花粉败育率逐级增加。其败育率增加幅度与品种抗旱性密切相关;抗旱性愈强的品种,败育率愈低。比较干旱和灌溉区四个小麦品种,同样显示抗旱品种的花粉败育率低于不抗旱品种。说明,干热条件下的花粉败育率可作为冬小麦的抗旱性生理指标。 Six wheat cultivars with different drought resistance were subjected to 8 hours of post-heading panning at 40 ℃, 45 ℃ and 50 ℃. The pollen abortion rate during flowering showed that the pollen abortion rates of all varieties increased gradually with the increase of temperature. The rate of increase of abortion rate was closely related to the drought resistance of varieties; the stronger the drought resistance varieties, the lower the rate of abortion. Comparing the four wheat cultivars in the arid and irrigated areas also showed that the pollen abortion rate of drought-tolerant cultivars was lower than that of non-drought cultivars. The results showed that the pollen abortion rate in dry and hot conditions could be used as the physiological index of drought resistance in winter wheat.