摘要
为深入研究和利用陕西汉中茶树种质资源,采用多样性分析、主成分分析、聚类分析等方法对53份野生及栽培群体茶树种质资源的20个外观形态指标进行了分析,结果表明53份汉中茶树种质资源叶片表型具有显著的多样性,其质量性状变异系数为33.15%,多样性指数平均为1.086,数量性状变异系数为20.77%,多样性为2.819。把20个质量和数量性状聚合成7个主成分,前7个主成分的累计贡献度达74.51%,即侧脉对数、叶形、叶长、叶宽、一芽三叶长、一芽三叶百芽重、叶齿锐度、叶缘形态8个主要指标。聚类分析分为四类,一类为大叶种,二类为中小叶种,三类为圆叶种,四类为中小叶长椭圆叶形种,初步确定了潜在优异种质资源表型特征,为加快育种进程提供参考。
In order to study and utilize the tea germplasm resources in Hanzhong,Shaanxi Province,diversity analysis,principal component analysis,cluster analysis,and other methods were used to analyze 20 phenotypic traits of 53 wild and cultivated tea germplasm resources.The results showed that the leaf phenotypes of these tea resources exhibited significant diversity,with a coefficient of variation of 33.15%for qualitative traits,an average diversity index of 1.086,a coefficient of variation of 20.77%for quantitative traits,and a diversity index of 2.819.Twenty qualitative and quantitative traits were aggregated into seven principal components,with the cumulative contribution of the first seven components reaching 74.51%.The eight main indicators identified were the number of lateral veins,leaf shape,leaf length,leaf width,one bud three leaves length,hundred-bud weight of one bud three leaves,leaf tooth sharpness,and leaf margin morphology.Cluster analysis grouped the 53 germplasm resources into four categories:large-leaf types,medium-and small-leaf types,round-leaf types,and medium-and small-leaf long elliptical types.The phenotypic characteristics of potentially superior germplasm resources were preliminarily identified,which provide a support for accelerating the tea breeding process.
作者
蒲国涛
黎钊
李佼
李秀峰
席彦军
刘明鲁
PU Guotao;LI Zhao;LI Jiao;LI Xiufeng;XI Yanjun;LIU Minglu(Hanzhong Agricultural Technology Extension and Training Center,Hanzhong,Shaanxi 723000,China)
出处
《陕西农业科学》
2025年第5期32-37,共6页
Shaanxi Journal of Agricultural Sciences
基金
陕西省农业农村厅2024年度第二批省级农业专项-优势特色种植业项目。
关键词
茶树
野生及栽培群体
种质资源
表型特征
多样性分析
Tea plant
Wild and cultivated populations
Germplasm resources
Phenotypic traits
Diversity analysis
