赣南巨桉种源/家系变异规律及选择  

Variation Analysis and Selection for Eucalyptus grandis Provenances and Families in Southern Jiangxi

作　　者：吴世军[1] 陈广超[1] 徐建民[1] 李光友[1] 宋佩宁[1] 郭文仲 

机构地区：[1]中国林业科学研究院热带林业研究所/热带林业研究国家林业局重点实验室,广东广州510520

出　　处：《林业与环境科学》2017年第6期1-7,共7页Forestry and Environmental Science

基　　金："十二五"农村领域国家科技计划"南方阔叶树种新品种选育技术研究"项目(2012BAD01B0401)

摘　　要：巨桉(Eucalyptus grandis)是我国最重要的桉树品种之一。通过对建立在赣南地区54月生的巨桉13种源175家系开展生长指标和形质指标的分析,方差分析结果表明:所有参试性状区组间均呈极显著差异,干形和分枝在种源间呈极显著差异,树高、单株材积、干形、分枝和冠幅在家系间差异极显著;胸径、树高、单株材积、干形、分枝和冠幅的表型和遗传变异系数分别为29.64%~30.12%、21.67%~22.51%、71.17%~73.40、14.02%~27.01%、17.49%~34.36%和54.13%~58.54%,遗传力分别为0.24、0.44、0.38、0.61、0.57和0.62;性状相关性分析表明:所有参试性状间均呈正相关,树高与其它参试性状间均呈极显著正相关,单株材积与胸径的相关系数最高为0.94,冠幅与分枝的相关性最低为0.05;参试性状综合比较分析,9号(来自昆士兰州Tully Gorge National Park)、10号(福建天马东溪)、12号(四川乐山)种源在各个性状上表现都较为突出;就生长而言,144号(来自昆士兰州Tully Gorge National Park)、125号(来自昆士兰州Bambaroo)、29号(来自昆士兰州Koombooloomba)和92号(来自昆士兰州Bambaroo)家系长势较好,143号(来自昆士兰州Tully Gorge National Park)家系干形通直且分枝均匀。Eucalyptus grandis is one of the most important species in China. The growth traits, quality traits and crown width of 175 families from 13 provenances aged 54 months on Sothern Jiangxi were analyzed. The variance analysis results showed that there were signifcant diferences in studied traits among blocks. The significant differences were also found on stem and branch among provenances and the significant differences were also found on height, volume,stem, branch and crown width among families. The phenotypic and genetic variation coefcients of diameter at breast height, height, volume, stem, branch and crown width were 29.64%-30.12%, 21.67%-22.51%, 71.17%-73.40, 14.02%-27.01%, 17.49%-34.36% and 54.13%-58.54%. The heritability of diameter at breast height, height, volume, stem, branch and crown width were 0.24、0.44、0.38, 0.61、0.57 and 0.62 respectively. The correlation analysis showed that studied traits had positive correlations. Height had signifcant positive correlations with other studied traits. The correlations between volume and diameter at breast height, crown width and branch were 0.94 and 0.05. Comprehensive selection results showed that No.9 （from Tully Gorge National Park QLD）, No.10 （fromDongxi, Tianma, Fujian）, and No.12 （fromLeshan, Sichuan） were growth best provenances. In terms of growth traits, No. 144（from Tully Gorge National Park QLD）, No. 125（from Bambaroo QLD）, No. 29（from Koombooloomba QLD）and No. 92（from Bambaroo QLD）families had the best growth.No. 143 （from Tully Gorge National Park QLD） had best stem and branch.Key words

关 键 词：巨桉 生长性状 形质性状 遗传力 

分 类 号：S792.39[农业科学—林木遗传育种]