杂交水稻制种产量常常受到不育系的开花习性的严重影响.如果有开花习性较好的不育系配组,制种就较为容易,且产量也较高.针对不育系的开花习性对制种产量的影响这一问题,我们对“威20A×明恢63”组合父母本开花习性进行观察,特别是对威20不育系从开颖至闭颖时间,颖壳的开张角度,及其与结实率的关系作了比较细致的观察,为今后制种提高结实率和产量提供依据. The yield of hybrid rice is often severely affected by the flowering habits of CMS lines.If there are CMS lines with better flowering habits, the seed production is easier and the yield is higher. The impact of seed production, we observed the flowering habits of “Wei 20A × Minghui63” parents, especially the opening angle of Wei-20 male sterile line from opening to closing time and glume shell, and The relationship between the rate of seed setting and the rate of seed setting made a more detailed observation to provide the basis for future seed production to improve seed setting rate and yield.