楸树杂种无性系幼龄期材性遗传变异  

Genetic Variation of Wood properties of Catalpa bungei Hybrid Clones at the Young Stage

作　　者：马建伟 王军辉[2] 宋璐[3] 贠慧玲 

机构地区：[1]甘肃省小陇山林业实验局林业科学研究所,天水741022 [2]国家林木育种重点实验室(中国林业科学研究院林业研究所) [3]甘肃农业大学

出　　处：《东北林业大学学报》2014年第10期11-15,19,共6页Journal of Northeast Forestry University

基　　金：“十二五”国家科技支撑计划项目(2012BAD01B05)

摘　　要：以11个楸树杂种无性系3年生幼树树干为材料,分析了木材材性的26个性状。结果表明:木材的基本密度、气干密度、纤维长度、木纤维比量和导管比量等材性性状在无性系间存在极显著差异,且重复力较大,受遗传控制较强,其遗传变异系数(GCV)分别为21.77%、34.09%、5.51%、7.52%、19.58%;因此在进行楸树无性系早期材性选择时,只需要分析木材密度、纤维长、木纤维比量、导管比量即可做出对无性系材性的初步评价。通过主成分和聚类分析可知,11个无性系在材性性状方面具有4个类型,第一类为无性系002-1、004-1的木材,密度大、纤维长,但胸径生长量小;第二类为无性系008-1,生长量中等,木材密度相对较小;第三类为无性系015-1、1-2、1-3、1-4、2-1、2-2、9-1、013-1,生长量、木材密度和纤维长度处于中等水平;第四类为无性系001-1,生长量最大,但木材密度和纤维长度中等。We studied 26 wood property characters of 11 three-year seedlings trunk of Catalpa bungei C. A. Mey hybrid clonesThe wood basic density,air dry density,fiber length,wood-fiber percentage and vessel percentage have highly significandifferences between clones with higher repeatability and stronger genetic control. The genetic variation coefficient（ GCV）were 21.77%,34.09%,5.51%,7.52% and 5.51%,respectively. Analyzing the wood density,fiber length,wood-fibepercentage and vessel percentage can make a preliminary evaluation of wood property during the early clonal wood property selection. By the principal components and cluster analysis,eleven clones in wood property had four groups,the first group was clone 002-1 and 004-1 with higher wood density and fiber length,but with decreased DBH growth,the second group was 008-1 with medium growth and relatively low wood density; the third group was clones 015-1,1-2,1-3,2-1,2-2,9-1 and 013-1 with medium growth,wood density and fiber length; the fourth group was 001-1 with the highest growth,the medium wood density and fiber length.

关 键 词：楸树 杂交无性系 基本密度 纤维长度 组织比量 遗传变异 

分 类 号：S781.1[农业科学—木材科学与技术]