关键词: 武夷名丛, 种质资源, 农艺性状, 聚类分析, 主成分分析

Abstract: In order to study the genetic diversity of local tea plant germplasm resources in Wuyishan and conduct identification and evaluation on them, this paper analyzed the genetic diversity, principal components and carried out clustering analysis on 21 major agronomic traits of 41 Wuyi Mingcong tea plant germplasm resources from Wuyishan tea area. Results showed that there were abundant genetic variations among 21 agronomic traits of 41 Wuyi Mingcong, and the genetic diversity indexes ranged from 0.32~2.17. Among them the highest genetic diversity index was leaf width and the lowest was tree type. The variation coefficient ranged from 9.93%~47.62%. The largest variation coefficient was the depth of leaf serratur and the smallest was the number of vein pair. The clustering analysis was conducted based on agronomic traits, and the 41 Wuyi Mingcong tea germplasms were divided into 3 groups. Among these 3 groups, there were significant differences in the other genetic traits, except 10 traits, including leaf attitude, leaf length, number of vein pair, etc.. Using principal component analysis, the paper synthesized 8 principal components from 21 agronomic traits, representing 71.97% information from 21 agronomic traits. Calculated the composite score of each Wuyi Mingcong accorded to the first 8 principal component values and their proportion of corresponding characteristic root value, the top 4 Wuyi Mingcong varieties were Jinsuoshi, Bantianyao, Shuijingui and Jinluohan which could be put to use in exploitation and innovative utilization of Oolong tea products, and selective breeding of superior varieties of tea plants.

Key words: Wuyi Mingcong, germplasm resource, agronomic trait, clustering analysis, principal component analysis