天然异交是我们常见到的混杂群体混杂的潜在因素,尤其是在冬大麦中。我们用冬大麦品种与春大麦品种间的四个杂交种演生的单倍体同型系在田间试验中对异交进行了研究。通过由电泳现象显示的贮藏蛋白基因位点Horl和Hor2上的条合性来判断异交的发生。秋播品系异交率平均约为5％,春播品系异交率平均约在0.5％以下。研究的四个杂种其中一个进行秋播其异交率约为10％。 Natural outcrossing is a potential factor for the mixed population we commonly see, especially in winter barley. We studied the outcrossing in a field experiment with haploid isoforms derived from four hybrids between winter barley varieties and spring barley varieties. The occurrence of outcrossing was judged by the banding on the Horl and Hor2 of the storage protein gene indicated by the electrophoresis. The outcrossing rate of the autumn sowing lines is about 5% on average, and the outcrossing rate of spring sowing lines is about 0.5% on average. One out of the four hybrids studied was sown in autumn and the out-of-coverage rate was about 10%.