欢迎访问林业科学,今天是

林业科学 ›› 2005, Vol. 41 ›› Issue (2): 66-73.doi: 10.11707/j.1001-7488.20050211

• 论文及研究报告 • 上一篇    下一篇

云杉天然群体表型多样性研究

罗建勋 顾万春   

  1. 中国林业科学研究院林业研究所,北京100091
  • 收稿日期:2004-03-02 修回日期:1900-01-01 出版日期:2005-03-25 发布日期:2005-03-25

Study on Phenotypic Diversity of Natural Population in Picea asperata

Luo Jianxun,Gu Wanchun   

  1. Research Institute of Forestry,CAF Beijing100091
  • Received:2004-03-02 Revised:1900-01-01 Online:2005-03-25 Published:2005-03-25

摘要:

以系统揭示云杉全分布区天然群体表型变异程度和变异规律为目的,以其全分布区10个有代表性天然群体,每个群体30个个体为试材,对针叶、球果、种鳞、种翅和种子等17个表型性状进行系统比较分析,采用方差分析、多重比较、相关分析和聚类分析等统计分析方法,讨论了群体间和群体内的表型多样性。结果表明:云杉种内表型性状在群体间和群体内存在极其丰富的遗传差异。云杉球果、针叶、种鳞、种翅和种子5个表型性状的变异系数分别为19.14%、26.46%、13.58%、19.78%和17 40% ,种鳞性状稳定性较其他性状高。表型分化系数(VST)的变幅为2.09%~40.62 % ,群体间表型分化系数均值为30.99%。群体间变异(30.99% )小于群体内变异(69.01% )。17个表型性状间多数呈极显著或显著的正相关,球果长度、球果径、种鳞长度、种鳞宽度和种子千粒重为云杉易测定和重要的表型性状。云杉种内群体表型变异在空间分布上呈现以纬度为主的单向变异模式,利用群体间欧氏距离进行UPGMA聚类分析表明,云杉群体可以划分为5类

关键词: 云杉, 天然群体, 表型多样性

Abstract:

This study was conducted to determine phenotypic variation of natural populations and found out the relation between phenotypic variation of natural populations and different distribution areas in P. asperata. Based on field investigations and analysis of the natural distribution of P.asperata in P.R.China,four cone characters, three needle traits,three seed scale traits,three seed wing characters and four seed traits in 30 trees from each of 10 populations in P. asperata were selected and investigated. Morphological diversities among/within populations were discussed on the basis of 17 phenotypic traits analysis such as the cone,the needle,the dry weight of cone,the seed scale,the seed wing,the seed and the weight of per 1 000 seeds and so on. The method of novon analysis,multi-comparison,related analysis and hierarchical cluster analysis were used for analysis of experimental results.The results showed that there was significantly difference in genetic variation among populations and among individuals within populations.In different individuals within populations,the CV of five phenotypic traits(in cone,needle,seed scale,seed wing and seed traits) were 19.14%,26.46%,13.58%,19.78% and 17.40%,respectively.The traits stability of seed scale was higher than that of other traits.The VST of cone, needle, seed scale,seed wing and seed ranged from 2.09% to 40.62%.The mean phenotypic differentiation coefficient VST between populations was 30.99%, which was greatly smaller than that within populations(69.01%). The cone length,cone diameter,seed scale length and the weight per 1 000 seeds were the most important phenotypic traits which were easy to measure in P.asperata. The traits variation of natural populations within P.asperata species affected mainly by latitude in spatial distribution.The 10 populations of P.asperata investigated could be divided into five groups according to the UPGMA cluster analysis.

Key words: Picea asperata, natural population, pbenotypic diversity