103份亚洲棉表型多样性分析

Analysis on Phenotypic Diversity of 103 Asiatic Cottons

对103份分别来源于印度、越南、贵州、广西和云南等不同地域的亚洲棉进行了表型遗传多样性分析。结果发现亚洲棉在质量性状和数量性状上均存在不同程度的遗传多样性；质量性状遗传多样性指数在主茎、叶、花、铃等不同部位表现不同；21个质量性状的多样性指数为0.04～1.01,平均0.57,3个数量性状的多样性指数为1.65～1.96,平均1.82,表明数量性状的遗传多样性大于质量性状。研究发现不同地域的亚洲棉遗传多样性不同,并将这103份亚洲棉聚类到8个组群。

Phenotypic diversity of 103 Asiatic cotton（ Gosyipium arboreum L.） accessions,collected from India,Vietnam,Guizhou province,Guangxi province,and Yunnan province of China,was analyzed. Different genetic diversity indexes existed between qualitative and quantitative characters owing to the difference of cultivated geographic regions. The diversity indexes of 21 qualitative characters including stem,folium,floral,and boll varied from 0. 04 to 1. 01 with an average of 0. 57,as well as the 3 quantitative characters from 1. 65 to 1. 96 with an average of 1. 82. These variations indicated that the genetic diversity of quantitative traits was more abundant than qualitative traits. The result showed that Asiatic cottons had different genetic diversity in diverse areas and the 103 Asiatic cotton accessions were clustered into 8 groups.