生物多样性 ›› 2008, Vol. 16 ›› Issue (4): 362-368.DOI: 10.3724/SP.J.1003.2008.07314

• 论文 • 上一篇    下一篇

滇北球花报春天然群体表型变异研究

张睿鹂, 贾茵, 张启翔*   

  1. (北京林业大学园林学院/国家花卉工程与技术中心, 北京 100083)
  • 出版日期:2008-07-20 发布日期:2008-07-20

Phenotypic variation of natural populations of Primula denticulata ssp. sinodenticulata

Ruili Zhang, Yin Jia, Qixiang Zhang*   

  1. College of Landscape Architecture, Beijing Forestry University, The Flower Engineer and Technological Research Cen-ter of China, Beijing 100083
  • Online:2008-07-20 Published:2008-07-20

摘要: 滇北球花报春(Primula denticulata ssp. sinodenticulata)的早春蓝紫色球状花序具有独特的观赏价值, 但由于多种因素的影响, 其天然群体正在逐渐减少。为评价其遗传多样性水平, 我们对滇北球花报春10个天然群体进行了表型性状变异研究。结果表明: 滇北球花报春8个表型性状在群体间和群体内均存在极显著差异, 变异系数(CV)在4.73–9.90%之间, 表型分化系数(Vst)在0.1541–0.4069之间, 平均值为0.2854, 群体内的变异是表型变异的主要来源。根据8个表型性状的UPGMA聚类分析将10个天然群体划分为3类。依本研究结果, 在对滇北球花报春种质资源保护时进行就地保护是十分必要的, 并且应该优先保护表型变异较为丰富的天然群体。

Abstract: Primula denticulata ssp. sinodenticulata (Primulaceae) is an herbaceous perennial in southwest China. Many gardeners recommend it for alpine garden construction or greenhouse cultivation. Due to habitat destruction, however, this plant is rapidly decreasing in number and size of populations. To conserve this plant for our future reintroductions and breeding, 10 natural populations of Primula denticulata ssp. sinodenticulata were analyzed using morphological markers. Morphological diversity among and within populations were analyzed based on 8 phenotypic traits of 30 plants from each population. Phenotypic variance analysis showed that significant variation existed among and within populations. Coefficient of variations (CVs) ranged between 4.73% and 9.90%, and phenotypic differentiation coefficients (Vst) ranged from 15.41% to 40.69%, the mean value was 28.54% and within-population variation comprised a majority of total pheno-typic variation. UPGMA Cluster analysis based on morphological traits showed that the 10 populations could be divided into three groups. According to our results, conservation of this species’ genetic resources should focus on protecting populations with higher morphological variation, and in situ conservation should be car-ried out in their original habitats.