---

期 刊 ：植物遗传资源学报 2015年 16卷 1期

关键词：白檀；居群；形态多样性；

Keywords:Symplocos Paniculata, population accessions, Phenotypic Diversity,

摘 要 ：对湖南地区6个白檀天然居群的90株11个表型性状进行观测，并进行方差分析、聚类分析、主成分及相关性分析。结果是11个表型性状均具有丰富的遗多样性(H’=1.487)。居群间的平均方差分量为52.34%，居群内的平均方差分量为37%，说明在白檀形态性状多样性分布上是居群间多样性程度大于居中群内，即居群间的形态变异是白檀形态变异的主要来源。主成份与相关分析结果显示在11个表型中树型因子是主要形态变异因子，年降雨量与树型因子呈显著正相关，其它性状变异受遗传的影响大于受环境的影响。

Abstract:In order to reveal the variation degree and variation pattern o f the phenotypic in Symplocos paniculata .11 phenotypic traits of 90 individuals from 6 natural population accessions belonging five areas of Hunan province were investigated. As well as their variance analysis, cluster analysis, principal component and correlation analysis were conducted. Results showed that there were rich genetic diversity morphologically (H‘ =1.487). Variance component between population was 52.34%，of that within population was 37%.Phenotypic variation between populations was greater than that within the populations of Symplocos paniculata. So Phenotypic variation between populations was the main source of phenotypic variation.Among 11 traits, factors of tree shape ( height of plant, canopy, base diameter of plant) were the main resources of phenotypic variation. And those factors significantly correlated with annual precipitation positively, But the other phenotypic traits were influenced greater by the hereditary variationin than surrounding environment.

---