摘要： 应用居群生物学原理及方法,对分布在中国不同地区的11个柠条锦鸡儿(Caragana korshinskiiKom.)天然居群进行取样,分析了叶、荚果、种子等11个指标的表型多样性。结果表明,柠条锦鸡儿居群在形态上具有丰富的多样性(H^'=2.019 0)。在遗传多样性的分布上,居群间虽存在一定程度的遗传变异,但遗传多样性主要集中在居群内部,这种特点是由柠条锦鸡儿异花、虫媒传粉的外繁育系统所决定。我国柠条锦鸡儿居群在各个分布区的遗传多样性程度也不同,从大到小依次为宁夏地区(H^'=1.706 8)>内蒙古地区(H^'=1.631 6)>陕西地区(H′=1.624 7)>山西地区(H^'=1.602 5)。

关键词: 柠条锦鸡儿, 天然居群, 表型多样性

Abstract: According to population biology theories, phenotypic diversity of eleven populations of Caragana korshinskiiKom. in China were selected and invest igated. The results showed that there was an abundant phenotypic diversity(H^'= 2.019 0) among these populations in 11 morphological characters such as leaves, pods and seeds. As for the distribution pattern of phenotypic diversity, the genetic variation among population(80163%) was greater than within populations (19.37%) which was decided by its outcrossing-insect breeding system. Phenotypic diversity of this species distributed over every region was different, whose turn was Ningxia region (H^'= 1.706 8) > Inner Mongolia region (H^'=1.631 6) > Shaanxi region > (H^'= 1.624 7) > Shanxi region(H^'= 1.602 5).

Key words: Caragana korshinskii , Natural population, Phenotypic diversity

中图分类号: 

• S793