连南栽培型古茶树资源叶片表型性状遗传多样性及聚类分析

以连南县内涡水、黄连、大龙不同地方的共66份栽培型古茶树资源为材料,对茶树叶长、叶宽、叶面积、叶形、叶身、叶缘等24项叶片表型性状进行了遗传多样性研究。通过变异系数、Shannon-Weaver、聚类分析等方法分析,结果表明:连南66份茶树资源24个叶片表型性状的平均变异系数为31.86%,其中叶基变异系数最大(92.90%),侧脉与主脉交角最小(12.02%)。24个叶片性状的平均遗传多样性指数为1.10,多样性系数均较大,叶基遗传多样性指数最大,其值为2.08,叶面遗传多样性指数最小,其值为0.59。基于24项叶片表型性状,66份茶树资源在欧氏距离为20时聚为5类,存在丰富的变异程度和遗传多样性。

Genetic Diversity and Cluster Analysis of Leaf Phenotypic Traits of Liannan Cultivated Ancient Tea

Genetic diversity of 66 cultivated ancient tea plants from Woshui, Huanglian and Dalong of Liannan was studied based on 24 leaf phenotypic characters such as leaf length, leaf width, leaf area, leaf shape, leaf lamina, leaf margin and so on, the method of variable coefficient, Shannon-Weaver and cluster analysis were used. The results showed that the average variable coefficient of the 66 cultivated ancient tea plants was 31.86%, and the variable coefficient of phyllopodium was the maximum (92.90%), while that of the angle between lateral vein and main vein was the minimum (12.02%). The average Shannon-Weaver index was 1.10, and the diversity coefficient was great. The diversity coefficient of phyllopodium was the maximum (2.08), and that of leaf area was the minimum (0.59). Furthermore, the 66 cultivated ancient tea plants were clustered into 5 groups at the euclidean of 20 based on 24 leaf phenotypic characters, which showed rich variation degree and genetic diversity.