萍乡显性核不育水稻感温性主要表现：①不同稃尖性状的不育株感温效应不同，红色稃尖的不育株比白色稃尖的不育株感温效应更强；②不同遗传背景的不育株感温效应不同；③同一株系不同单株感温效应不同；感温性强的单株其后代不育材料感温性也强。说明显性核不育材料的感温性具有相对稳定的遗传效应，通过理想亲本选择可削弱不育材料的感温性。本文提出了通过高温筛选减少温度对不育性影响，使显性核不育基因更好地利用于育种实践上 The main manifestations of temperature sensitivity of Pingxiang dominant genic male sterile rice were as follows: ① The temperature-sensitive effects of different male sterile plants were different, the red-tip sterile plants had stronger effect on temperature than the sterile ones with white tip; ② Different The effect of temperature on the sterile plants with different genetic background is different; ③ The effect of different temperature on different plants of the same strain is different; It shows that the temperature-sensitive of the dominant genic male sterile material has a relatively stable genetic effect, and the ideal parental selection can weaken the temperature-sensitiveness of the sterile material. In this paper, the effects of temperature reduction on sterility through high temperature screening were optimized, and the dominant nuclear sterile genes were better utilized in breeding practice