植物遗传资源学报2026，Vol.27Issue(2)：373-386,14.DOI:10.13430/j.cnki.jpgr.20250912002
临沧古茶树种质资源表型性状遗传多样性研究
Research on the Genetic Diversity of Phenotypic Traits of Ancient Tea Tree Germplasm Resources in Lincang City
摘要
Abstract
To identify and evaluate the genetic diversity of phenotypic traits in 200 ancient tea tree germplasm resources from Lincang,42 phenotypic traits were studied by means of correlation analysis,principal component analysis and cluster analysis.The results indicated that the 28 qualitative traits exhibited a rich degree of variation in the tested germplasm.There were significant differences in the genetic diversity indices of each trait,ranging from 0.056 to 1.106,with an average genetic diversity index of 0.670.The coefficient of variation of the 14 quantitative traits ranged from 5.03％to 34.30％,with an average of 20.97％.Correlation analysis revealed that most phenotypic traits were significantly or extremely significantly correlated.A total of 14 principal components were extracted through principal component analysis,with a cumulative contribution rate of 70.97％.They respectively focused on reflecting the characteristics of tea plants such as the number of ovary,corolla diameter,main vein downy hairs,leaf area,leaf length,leaf width,leaf size,length-to-width ratio and leaf shape.Based on phenotypic traits,cluster analysis was conducted.When the Euclidean distance was 20,200 ancient tea tree germplasm resources could be classified into four major groups.The main traits among each group were significantly different,and the cluster analysis did not completely rely on geographical distribution for classification.The research results show that the phenotypic variations of the ancient tea tree germplasm resources in the eight counties(districts)of Lincang city are rich,and the level of genetic diversity is relatively high,demonstrating good potential for the selection and breeding of high-quality tea tree varieties,providing a basis for the protection and sustainable utilization of ancient tea tree resources in Lincang.关键词
临沧/古茶树资源/表型性状/遗传多样性Key words
Lincang/ancient tea tree resources/phenotypic traits/genetic diversity引用本文复制引用
马春莲,谢艳兰,王绍梅,李晓君,刘学艳,曹琦,余金慧,徐婷,刘艳红,李友勇,罗伟宏,黄飞燕..临沧古茶树种质资源表型性状遗传多样性研究[J].植物遗传资源学报,2026,27(2):373-386,14.基金项目
云南省科技厅重点实验室建设项目(202449CE340010) （202449CE340010）
临沧市建设国家可持续发展议程创新示范区科技专项(202204AC100001-A01)Key Laboratory Construction Project of Yunnan Provincial Department of Science and Technology(202449CE340010) （202204AC100001-A01）
Science and Technology Special Project for the Construction of National Sustainable Development Agenda Innovation Demonstration Zone in Lincang City(202204AC 100001-A01) （202204AC 100001-A01）
