本文探明不同类型小麦品种人工授粉后精卵核融合所需时间及合子延续时间,可为辐射育种提供适宜的合子期照射时间,从而获得较高的突变频率和较稳定的突变类型。三种不同类型品种小麦从授粉到精卵核融合完成,进入合子期,其过程基本相似,约需6—7小时。而合子延续时间表现不一:冬麦农大139是从授粉后7小时至13小时,长达7小时;半冬 This paper explores the time and zygote duration of sperm-egg fusion after artificial pollination of different types of wheat varieties, which can provide appropriate zygotic irradiation time for radiation breeding, thus obtaining higher mutation frequency and more stable mutation types. Three different types of wheat from the pollination to the egg nucleus fusion completed, into the zygotic period, the process is basically similar, takes about 6-7 hours. And Zizi continuation of the performance of different: Winter Wheat Nongda 139 from 7 hours after pollination to 13 hours, up to 7 hours; half winter