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杂交育种选配亲本的原则之一是杂交亲本的遗传差异要大。过去,一般用亲本地理上距离的远近代表它们遗传差异的大小。但有研究指出,亲本的地理分布和其遗传差异间并无直接的联系,因此近年来用主成份分析和聚类分析相结合的方法,研究作物品种间数量性状遗传差异的大小。例如毛盛贤等、何国浩等、汤陵华等分别在小麦、大豆、水稻品种上作过研究。莫惠栋等在大麦上也作过聚类分析,但其研究的品种大部份是多棱大麦品种,因此所得结论在二棱大麦新品种选育上直接应用尚有一定距离。本文用主成份分析和聚类分析相结合的方法,对46个二棱大麦品种的遗传差异进行
One of the principles of crossbred matching parenting is that the genetic variation in the crossing parent is greater. In the past, the size of their genetic differences was generally represented by the distances of the parents’ geographies. However, studies have shown that there is no direct relationship between the geographical distribution of the parents and their genetic differences. Therefore, in recent years, using principal component analysis and cluster analysis to study the genetic differences in quantitative traits among crop varieties. Such as Mao Shengxian et al., He Guowo et al., Tang Linghua et al. Studied on wheat, soybean and rice varieties respectively. Mo Huidong et al. Also did clustering analysis on barley, but most of the cultivars studied were polygamous barley varieties. Therefore, there is still some distance between the conclusion and the direct application of new varieties of barley. In this paper, the principal component analysis and cluster analysis combined method of genetic diversity of 46 two-rowed barley varieties