热带作物学报2025，Vol.46Issue(10)：2376-2389,14.DOI:10.3969/j.issn.1000-2561.2025.10.009
基于叶片解剖结构特征的50份茶树品种(系)综合评价与性状关联分析
Leaf Anatomical Determinants of Stress Resistance and Productivity:A Comprehensive Evaluation of 50 Tea Accessions in Guangxi
摘要
Abstract
This study was aimed to identify high-quality and stress-resistant germplasm resources of subtropical tea for the purpose of supporting new variety breeding and the development of characteristic tea products.Leaves from 50 tea accessions cultivated at Tea Teaching and Research Base of Guangxi Vocational and Technical College in Nanning were selected as the samples.17 leaf anatomical and structural traits were examined to assess the genetic diversity.Based on stress resistance,processing suitability,productivity potential of the traits were evaluated.Principal component analysis combined with hierarchical cluster analysis was employed for the comprehensive evaluation.There existed substantial genetic variation among the accessions,and the coefficient of variation ranged from 11.00％to 39.10％.The accessions demonstrated robust stress resistance with average membership function value for drought resistance and pest resistance 0.67 and 0.61,respectively,along with average cold resistance score 6.28.The average productivity index of 3329.20 suggested a relatively high productivity potential.Based on the leaf anatomical and structural indicators,the accessions were clustered into three distinct groups.The upper cuticle thickness,lower cuticle thickness,upper epidermis thickness,lower epidermis thickness,palisade tissue thickness,palisade tissue layer number,spongy tissue layer thickness,leaf thickness,and calcium oxalate crystal indexes of the Group 2 appeared to be significantly or highly significantly dif-ferent than those of Group 1 and Group 3.Based on the top five principal component values and the corresponding ei-genvalues of the accessions,a linear equation was established to calculate the comprehensive score of the principal components.The top 10 accessions exhibited superior overall characteristics,demonstrating strong potential for breed-ing elite tea cultivars.These findings would provide valuable references for identification and utilization of the superior local tea germplasm resources in Guangxi.关键词
茶树品种/叶片解剖结构/抗逆性/聚类分析Key words
tea accessions/leaf anatomical structure/stress resistance/cluster analysis分类
农业科技引用本文复制引用
覃爱颖,陈恩海,劳福增,陈达辉,钟勇,莫干辉..基于叶片解剖结构特征的50份茶树品种(系)综合评价与性状关联分析[J].热带作物学报,2025,46(10):2376-2389,14.基金项目
广西高校中青年教师科研基础能力提升项目(桂教科研[2023]2号2023KY1030) （桂教科研[2023]2号2023KY1030）
国家现代农业产业技术体系广西创新团队建设专项资金项目(桂财农函[2025]9号). （桂财农函[2025]9号）
