银杏品系叶主要功能性状及组分含量差异分析

Difference Analysis of Main Functional Characters and Component Con-tents in Leaves of Ginkgo biloba Strains

为了筛选银杏优良叶用种质,分析了银杏叶主要功能性状(单叶干重,单叶面积,比叶干重)和主要功能组分(总黄酮,萜内酯,聚戊烯醇)含量在38个银杏品系间的差异性,基于主成分分析和隶属函数法综合评价了38个银杏品系的叶用品质。结果表明:(1)不同银杏品系间叶功能性状及组分含量均存在极显著差异(P<0.01),呈现出较高的遗传变异,变异系数变幅为11.39%~39.73%;(2) Pearson相关性分析显示,单叶干重与单叶面积、比叶干重均呈极显著正相关(P<0.01),总黄酮与聚戊烯醇呈显著负相关(P<0.05);(3)经过隶属函数综合评价和聚类分析,对各银杏品系的叶品质进行排序、分类,最终筛选出18、24、38、39号这4个叶用优良品系,具体表现为单叶干重高,功能性组分含量高。

In order to screen the superior leaf germplasm of ginkgo(Ginkgo biloba),the differences of main func-tional traits(dry weight per leaf,leaf area per leaf,specific dry weight)and main functional components(total fla-vonoids,terpene lactones,polypentenol)in the leaves of 38 ginkgo strains were analyzed.The leaf quality of 38 ginkgo strains was evaluated based on principal component analysis and membership function method.The results showed that:(1)Significant differences in leaf functional traits and component contents among different ginkgo strains were found,showing high genetic variation,with a coefficient of variation ranging from 11.39%to 39.73%;(2)Pearson correlation analysis shows that single leaf dry weight was significantly positively correlated with single leafareaandspecificleafdryweight(P<0.01),and total flavonoidswere significantlynegativelycorrelated with poly-pentenol(P<0.05);(3)After comprehensive evaluation of membership function and aggregation category analysis,sorting and classifying the leaf quality of each ginkgo strains,and finally screening out the four excellent foliar strains No.18,24,38,and 39.The specific performance is good leaf quality,high single leaf dry weight and high content of functional components.