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采用变异系数、多样性指数和聚类分析等方法,对国外引进的30份辣椒种质资源39个表型性状进行了遗传多样性分析研究。研究表明国外引进辣椒种质39个表型性状的平均变异系数为42.14%,其中单果重变异系数最大(132.40%),子叶颜色最小(6.01%)。在27个质量性状中,分枝类型的多样性信息指数最高(19.711),青熟果色最低(0.501);12个数量性状中,单节叶腋着生花数的多样性信息指数最高(0.955),株高多样性指数最低(0.465)。基于39个表型性状,30份供试辣椒材料在欧氏距离为15.47时聚为2类。在欧氏距离为13.75时,可以把30份辣椒材料分成3个亚类群,第Ⅰ亚类包括8份辣椒资源,第Ⅱ亚类包括10份辣椒资源,第Ⅲ亚类包括12份辣椒资源。辣椒种质资源表型性状的多样性指数和变异程度均较高,具有丰富的多样性和变异程度。
By using the methods of variation coefficient, diversity index and cluster analysis, the genetic diversity of 39 phenotypic traits in 30 pepper germplasm resources imported from abroad were analyzed. The results showed that the average coefficient of variation (CV) of 39 phenotypic traits introduced abroad was 42.14%. The coefficient of variation of single fruit weight was the highest (132.40%) and the color of cotyledon was the smallest (6.01%). Among the 27 quality traits, the diversity index of branching type was the highest (19.711) and the lowest (0.501), and the information index of the number of axillary flowers was the highest (0.955) among the 12 quantitative traits. , The lowest diversity index (0.465). Based on the 39 phenotypic traits, 30 pepper samples were clustered into two groups at a Euclidean distance of 15.47. At a Euclidean distance of 13.75, 30 pepper materials can be divided into three subgroups, with the first subgroup consisting of eight pepper sources, the second subgroup including 10 pepper sources and the third subgroup the 12 capsicum resource. Capsicum germplasm resources of pepper diversity index and degree of variation are high, with rich diversity and degree of variation.