不同种源三叶青的农艺性状和品质性状的因子分析和聚类分析

Factor analysis and cluster analysis of agronomic traits and quality traits of Tetrastigma hemsleyanum from different provenances

对2018年采集到的15个种源三叶青的农艺性状和品质相关性状进行系统测定,通过因子分析和聚类分析对不同种源的三叶青进行综合评价。结果表明:不同种源三叶青的农艺性状和品质性状存在显著性差异,其性状变异系数范围为14.029%~55.858%,变异系数最大的性状为茎叶总重;三叶青地下部分总重和总黄酮含量与叶长、叶宽和茎叶总重呈现极显著正相关,三叶青块根的总酚含量与三叶青茎长、茎粗、叶长、叶宽和茎叶总重呈现极显著正相关;8个性状可由3个主因子来表述,其贡献率达84.798%,分别归纳为产量因子、成分因子和株型因子;综合评价和聚类分析的结果表明,种源为三元(福建)、始兴(广东)、乐业(广西)、竹洋(浙江)和百丈(浙江)的三叶青具有较高的产量和有效成分含量。该结果可为三叶青良种繁育提供理论依据,为栽培技术优化提供指导。

The agronomic traits and quality-related traits of Tetrastigma hemsleyanum from 15 provenances collected in 2018 were systematically determined, and T. hemsleyanum from different provenances were evaluated comprehensively through factor analysis and cluster analysis. The results showed that there were significant differences among T. hemsleyanum from different provenances in agronomic traits and quality traits, and the coefficient of variation of traits ranged from 14.029% to 55.858%. The trait with the largest coefficient of variation was the total weight of stems and leaves. The total weight of underground parts of T. hemsleyanum and total flavonoid content were extremely significantly positively correlated with leaf length, leaf width, and total weight of stems and leaves. The total phenol content in the tuberous root of T. hemsleyanum was extremely significantly positively correlated with stem length, stem thickness, leaf length, leaf width and total weight of stems and leaves. 8 traits can be expressed by 3 principal factors with a contribution rate of up to 84.798%, which can be summarized as yield factor, composition factor and plant type factor respectively. The results of comprehensive evaluation and cluster analysis showed that T. hemsleyanum from the provenances of Sanyuan(Fujian), Shixing(Guangdong), Leye(Guangxi), Zhuyang(Zhejiang) and Baizhang(Zhejiang) had higher yields and active ingredient content. The results of this article can provide a theoretical basis for the stock breeding of T. hemsleyanum and guide the optimization of its cultivation techniques.