湖南辣椒地方品种资源的因子分析及数量分类

本文对40个湖南辣椒地方品种进行因子分析,并将其分为7大类.结果表明,数量分类的结果基本上反映辣椒品种间的遗传差异,符合实际情况.当主因子的特征值累计贡献率大于75%时,主因子值就能基本反映原来性状的遗传特征.果重、果数和株型是辣椒品种主因子的重要影响变量.Promax斜交旋转后的主因子比方差极大正交旋转后的主因子更能代表品种遗传特性.比较不同的系统聚类方法,类平均法能较好适合辣椒品种的数量分类.

Factor Analysis and Numerical Taxonomy of Landraces in Hunan

Factor analyses of 40 capsicum landraces in Hunan were carried out. These varieties were clustered to 7 groups. It was indicated that the numerical taxonomy basically revealed the genetic differences among the varieties. When the characteristic values reached over 75% in their accumulative contribution rates, these main factors' values would represent the genetic characteristics of these traits. Fruit weight, fruit number and plant shape were very important variables influencing the main factors of capsicum varieties. The main factor after Promax rotation could represent more precisely the genetic characteristic of varieties than these after Varimax rotation. Compared with other systematic clustering method, UPGMA would be better for the numerical taxonomy of the capsicum varieties.