亚热带植物科学 ›› 2020, Vol. 49 ›› Issue (01): 32-40.DOI: 10.3969/j.issn.1009-7791.2020.01.006

• 植物生态 • 上一篇    下一篇

濒危植物水青树叶表型性状多样性分析

段 帆,李 珊,甘小洪   

  1. (西南野生动植物资源保护教育部重点实验室/西华师范大学生命科学学院,四川 南充 637009)
  • 收稿日期:2019-09-02 修回日期:2019-11-06 出版日期:2020-02-20 发布日期:2020-02-20
  • 通讯作者: 甘小洪
  • 基金资助:
    西华师范大学英才基金(No. 17YC325);西华师范大学基本科研业务费专项资金(No. 18B026);全国第四次中药资源普查专项基金(No. 2018PC001)

Diversity Analysis on Leaf Phenotypic Traits of the Endangered Plant Tetracentron sinense

DUAN Fan, LI Shan, GAN Xiao-hong   

  1. (Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education/College of Life Sciences, China West Normal University, Nanchong 637009, Sichuan China)
  • Received:2019-09-02 Revised:2019-11-06 Online:2020-02-20 Published:2020-02-20
  • Contact: GAN Xiao-hong

摘要: 通过对水青树(Tetracentron sinense)24个居群161株个体的10个叶形态性状与7个叶表皮微形态性状进行观测,采用描述性统计、相关性分析、主成分分析以及聚类分析对其叶表型性状多样性进行研究。结果表明,水青树叶表型性状变异系数的变化幅度为4.21%~49.23%,Shannon-wiener多样性指数在0.82~2.07之间,其中叶最长(LLEST)性状最高,叶先尖削(LBPI)性状最低,平均1.80;叶形态性状相关性分析表明,性状之间存在密切联系,有47对性状呈极显著正相关,15对性状呈极显著负相关;主成分分析中前三个主成分的贡献率可达83.712%,可靠地代表了水青树表型性状的分布;Q型聚类分析发现,当阈值为15时,24个水青树居群可分为3类。水青树总体表现出较低表型多样性,唐家河、虹口、佛坪三个居群应作为保护与管理的重点群体。

关键词: 水青树, 叶表型性状, 相关性, 聚类分析, 综合评价

Abstract: In order to provide scientific foundation for the conservation, development and application of Tetracentron sinense germplasm resources, 10 leaf morphological traits and 7 leaf epidermal micromorphological traits of 161 individuals in 24 populations were investigated, and then the methods such as descriptive statistics, genetic correlation analysis, principal component analysis and cluster analysis were used to discuss the phenotypic diversity of the endangered plant. The coefficient of variation among leaf phenotypic traits indexes varied from 4.21% to 49.23%, and Shannon-wiener diversity indexes varied from 0.82 to 2.07, with an average of 1.80, in which the LLEST was the maximum, and the LBPI was the minimum. Close relationship existed among leaf phenotypic traits. The contribution rate of the first three principal components reached 83.712%, which could respectively represent the distribution of phenotypic traits. Twenty-four populations of T. sinense were clustered into 3 groups when threshold was 15 in Q-clustering analysis. Results showed that the leaf phenotypic diversity of T. sinense was relatively low. Tangjiahe(TJH), Hongkou(HK) and Foping(FP) should be considered as key protection of wild populations.

Key words: Tetracentron sinense, leaf phenotypic traits, correlation, clustering analysis, comprehensive evaluation

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