冬小麦花期遇阴雨天气，使小麦授粉不良，不孕不育，不能形成籽粒，造成严重的减产损失。针对这种情况，1999年舟曲县种子部门积极从临洮县良种场引进闭颖授粉品种，进行大田良种繁育推广，克服了阴雨造成小麦花期授粉不良的危害，优化了小麦品种结构，提高了小麦平均亩产。1品 Winter wheat flowering cloudy weather, poor pollination of wheat, infertility, can not form the grain, resulting in serious loss of yield. In response to this situation, in 1999, the seed division of Zhouqu County actively introduced closed-leaf pollination varieties from the Linqu County thoroughbred field to carry out the promotion and breeding of the field seed breeding, overcoming the harmful effects of the unfavorable pollination caused by cloudy and rainy wheat florescence, optimizing the wheat variety structure and raising the wheat Average mu production. 1 product