尾巨桉杂种无性系多性状综合评价  

Comprehensive Analysis of Multiple Traits of Eucalyptus urophylla × Eucalyptus grangdis Clones

作　　者：李昌荣[1] 吴兵 陈东林 唐庆兰[1] 张照远[1] 吴晓东 兰俊 

机构地区：[1]广西林业科学研究院国家林业局中南速生材繁育实验室广西优良用材林资源培育重点实验室,广西南宁530002 [2]广西国有东门林场,广西扶绥532108 [3]广西国有黄冕林场,广西鹿寨545600

出　　处：《西部林业科学》2014年第4期37-43,共7页Journal of West China Forestry Science

基　　金：林业公益性行业科研专项"桉树生态经营及产业升级关键技术研究"(201104003-05);广西林业科技项目"桉树人工林可持续经营技术试验示范"(桂林科字[2012]第11号);广西林业科技项目"优质材桉树无性系选育与产业化利用"(桂林科字[2014]第04号)

摘　　要：以广西东门林场15年生21个尾巨桉杂种无性系为研究对象,对其生长、形质、材性相关性状进行研究。结果表明,单株材积大于总体平均值的无性系有9个,单株材积最大的是DH33-27,达到0.772 2 m3,形质指标以DH32-28为最好,木材密度预测值最小的是DH15-3;方差分析表明,树冠在尾巨桉无性系间存在显著差异,其余8个性状无性系间存在极显著差异;单株材积与胸径、树高呈极显著的正相关,木材密度预测值与胸径、单株材积、枝下高、干形、树冠相关关系不显著;各性状的变异系数差异很大,纤维倾角的遗传变异系数和表型变异系数最大,木材密度预测值的无性系重复力和单株重复力最大;通过主成分分析,选出适合中大径材培育的无性系为DH32-28、DH33-27、DH32-26、DH33-20、DH33-9。21 clones of 15-years-old Eucalyptus urophylla ＆#215;E.grandis in Guangxi Dongmen forestry farm was cho-sen , and their growth , forms of quality and relative wood properties were studied.The results showed：there were 9 clones that their single volume were bigger than the mean value of the total 21, and the clone DH33-27 was the best one with its single volume of 0.772 2 m3 , the form quality of DH32-28 was the best , and the Pilodyn pin penetration readings of DH 15-3 were the lowest; Analysis of variance showed that there were significant differences in tree crown among different clones , and there were very significant differences in other 8 traits; The single vol-ume had significant positive correlation with DBH and tree heigh , and the wood density had no significant correla-tion with DBH , single volume , branch height , form quality and tree crown; The coefficient of different traits ’ variation were significinat different.The coefficients of genetic and phenotypic variation of spiral grain were the max-imum, the Pilodyn pin penetration readings were the minimum; the repeatability of wood density value was the maximum.Through principal component analysis , DH32-28, DH33-27, DH32-26, DH33-20and DH33-9 were selected as the superior clones for sawlog silviculture.

关 键 词：尾巨桉 无性系 多性状 主成分分析 杂种 

分 类 号：S792.39[农业科学—林木遗传育种]