香榧天然群体表型性状遗传多样性分析  

Phenotypic Diversity of Natural Torreya grandis Populations

作　　者：闵会[1] 程诗明[2] 康志雄[3] 陈友吾[2] 

机构地区：[1]浙江林学院,浙江临安311300 [2]浙江省林业科学研究院,浙江杭州310023 [3]浙江省林业厅,浙江杭州310020

出　　处：《浙江林业科技》2009年第2期24-28,共5页Journal of Zhejiang Forestry Science and Technology

基　　金："十一五"国家科技支撑课题"林木;花卉基因资源发掘与种质创新利用研究"子课题"东亚热带林木基因资源创新利用研究"(2006BAD13B07-9);浙江省自然科学基金项目"香榧天然群体遗传多样性研究与优异种质创新利用"(Y306613);浙江省科研院所专项"浙江省特色经济林种质资源的收集;保存与创新利用研究"(2006F11002)

摘　　要：以香榧主要分布区6个天然群体的92个样株为试验材料,对其针叶、果实、种子的8个表型性状进行分析,讨论群体间和群体内的表型多样性。结果表明:香榧各表型性状在群体间和群体内都存在显著差异,群体间表型分化系数占10.8%,群体内占89.2%,群体间的变异小于群体内。各群体表型性状中平均变异系数最小的为果实宽(CVv=13.95%),最大的为单粒重(CVv=34.71%);不同群体各形态性状平均变异系数由大到小顺序为:黄山>磐安>嵊州>钟家岭>诸暨东白湖、绍兴。通过表型性状的聚类分析可以将香榧6个群体划分为3个类群。92 individuals in six natural populations of Torreya grandis in China were selected and investigated for discussion on phenotypic diversity within and among populations. Analysis on 8 traits of needle, fruit and seed demonstrated that there was significantly difference among and within populations. The mean phenotypic differentiation coefficient showed that the variation within populations （ 89.25 ） was higher than that among populations （10.2%）. The variation in traits of fruit width was the lowest （CV = 13.95%） and in the traits of seed weight was the highest （CV = 34,71%）. According to the average coefficient of variation, different populations had a descending order： Huangshan, Pan＇an, Shengzhou, Zhongjialing, Dongbaihu, Shaoxing. According to the UPGMA cluster analysis, the six populations could be divided into three groups.

关 键 词：香榧 天然群体 遗传 表型多样性 表型分化系数 

分 类 号：S718.54[农业科学—林学]