油松优良家系数量性状遗传距离分析  

The Analysis on Genetic Distance of Superior Families Quantitative Character of Pinus tabulaeformis

作　　者：王娟娟[1] 刘永红[1] 樊军锋[1] 杨培华[1] 韩创举[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100

出　　处：《西北林学院学报》2008年第6期87-90,共4页Journal of Northwest Forestry University

基　　金：国家林业局科技推广项目(2006-85);西北农林科技大学育种专项项目(05YZ-035-1)

摘　　要：以21 a生油松子代测定林中34个油松优良家系为对象,对生长和干形数量性状的遗传变异、性状间的相关关系进行研究,并利用主成分分析和遗传距离聚类分析方法对油松家系进行了综合评价。结果表明:油松优良家系间在树高、胸径、材积、结实、干形和保存率等方面存在着显著差异,这些差异主要受遗传因素控制;生长性状之间的遗传相关达到极显著水平(P<0.01),胸径和材积与结实性状遗传相关也达到显著水平(P<0.05);3号家系、31号家系和16号家系主成分值较大,是生长和结实都较好的优良家系。聚类结果表明:34个油松优良家系分为6个明显类群,同一类群内家系间遗传距离小,不同类群间遗传距离大。生长量大的I、II、III类家系可作为进一步遗传改良的优良家系。With 34 superior families of 21-year-old progeny forest of Pinus tabulaeformis as subject,their genetic variations of quantitative characters including height,DBH,timber volume,quantity of cone,trunk shape and survival rate were studied,and correlations among these characters were analyzed.The superior families were assessed by means of principal component analysis and cluster analysis of genetic distance.The results showed that different families had highly significant difference in terms of height,DBH,timber volume,quantitative of cones,trunk shape as well as the preservation rate,which are mainly genetically controlled.Highly significant genetic correlations existed among the growth characters(P<0.01),and so did the significant genetic correlations between DBH and volume and quantity of cones(P<0.05).Superior family No.3,No.31 and No.16 had higher values of principal components,better families over the others in growth and bearing cones.The cluster analysis showed that 36 superior families fell into 6 obvious groups.Within each group,genetic distance among the families is shorter whereas genetic distance among different groups is larger.Group I,group II and gropu III which are characterized with better growth can be chosen as the superior families for further genetic improvement.

关 键 词：油松 遗传距离 主成分分析 聚类分析 

分 类 号：S791.254.04[农业科学—林木遗传育种]