小麦高空诱变育种研究

Wheat Breeding under Condition of High Space Mutation

高空处理的小麦种子ＳＰ１代基本无变异，ＳＰ２代在幼苗习性、抽穗期、株高、穗型、粒质、成穗数等性状均产生较明显的变异，这些变异一般在ＳＰ３代中，ＳＰ４代稳定，缩短了育种年限。通过对变异性状的选择已育出两个苗头品系。高空诱变为小麦育种提供了一条新的育种途径，也为航天部门为农业服务开拓了一个新的领域。

Wheat seeds shipped by satellite or high space ballion almost didn't show any variations in SP1 generation,but in SP2 significant variations were observed in such characters as growth habit,heading date,plant hight,ear type,grain hardness,spike numbers per plant etc.These variations kept stable generally in SP3 or SP4 so the years of selecting a variety could be shortened.Two promising lines have been selected through high space mutation.This method provides a new way for wheat breeding,and also opens up a new field for space departments in serving agriculture.