10年生黑杨派无性系材性径向遗传变异分析与综合评价  

Radial Genetic Variation Analysis and Comprehensive Evaluation of Wood Properties in Ten-year-old Section Aigeiros Clones

作　　者：严涵薇 程雅静 余彤彤 余娜 周亮[1] 刘盛全[1] YAN Han-wei;CHENG Ya-jing;YU Tong-tong;YU Na;ZHOU Liang;LIU Sheng-quan(School of Forestry&Landscape Architecture,Anhui Agriculture University,Hefei 230036,Anhui,China)

机构地区：[1]安徽农业大学林学与园林学院,安徽合肥230036

出　　处：《林业科学研究》2021年第6期28-37,共10页Forest Research

基　　金：国家重点研发专项计划(2017YFD0600201);国家自然科学基金(31770595、31800557)。

摘　　要：[目的]研究黑杨派无性系材性性状遗传变异,并进行综合评价,为其工业用材林定向培育和木材利用提供理论依据。[方法]对河南省焦作8个黑杨派无性系试验林选取10年生样木(每个无性系5株)进行材性性状(解剖特性、物理性能、化学组成)测定,对18个材性性状进行遗传变异分析和遗传参数估算,并采用主成分分析法对无性系进行综合评价。[结果]除半纤维素外,其他17个材性性状在不同无性系间均差异极显著。18个材性性状的无性系重复力为0.49~0.93,其中,全干密度、基本密度、综纤维素、径向-细胞直径和径向-细胞腔径的重复力达0.8以上。无性系材性性状表型变异系数均大于遗传变异系数,经主成分分析评选出中林46杨为主成分综合分值最高的无性系。[结论]8个黑杨派无性系在18个材性性状上差异显著,并受较强的遗传控制,具备遗传改良的条件。无性系重复力存在径向差异,随着年轮的增大,物理性能变化幅度最小,全干密度和基本密度相对稳定。[Objective]The purpose of this research is to study the differences and genetic characteristics of various timber traits among Section Aigeiros clones,and to evaluate the excellent degree of wood properties of the clones,so as to provide theoretical basis for breeding clones with excellent comprehensive characters in experimental areas,and promote the directional cultivation of industrial timber.[Method]The wood properties(anatomical features,physical properties,and chemical composition)of ten-year-old sample trees(5 plants per clone)were measured from 8 experimental Section Aigeiros clones in Jiaozuo,He’nan Province.The genetic variation and genetic parameters of 18 wood traits were analyzed,and principal component analysis was used to evaluate the clones.[Result]Except the hemicellulose,the other 17 wood properties of poplar clones showed significant differences among clones.The variation range of clone repeatability was 0.49-0.93,in which the absolutely dried density,basic density,total cellulose,radial cell diameter and radial lumen diameter were more than 0.8.The phenotypic variation of clones was greater than the genetic variation.Populus×euramericana’Zhonglin 46’was selected as the superior clones based on the highest core of principal component factors.[Conclusion]The eight poplar clones showed genetic differences in 18 wood properties,which were under strong genetic control and possessed the conditions of genetic improvement.There were radial differences in clone repeatability.With the increase of annual rings,the variation range of physical properties was the smallest,and the absolutely dried density and basic density were relatively stable.

关 键 词：黑杨派无性系 材性 径向 遗传变异 

分 类 号：S792.11[农业科学—林木遗传育种]