摘要
对9个桉树无性系在黔西南州巧马林场的早期生长研究表明:无性系间在7月生树高以及20月和34月生树高、胸径和材积性状上的差异均达0.01显著水平,表明优良无性系选择的潜力较大;各性状广义遗传力介于0.01(D34)~0.22(H20)之间,表明早期生长性状受较低程度的遗传控制;相同林龄的生长性状间表型相关系数和遗传相关系数均较大,而7月生树高与后期生长的相关性随林龄增加而减小。初步选出DH32-29、GL-9和1-082为速生的优良无性系。
Abstract This paper presents analyses on early growth of nine eucalypt clones tested in south-western Guizhou province. The clones differed at 0.01 significance level in all early growth traits, including 7-month-old height (H7) as well as 20 and 34-month-old height, diameter at breast height, and volume, suggesting certain potentials in selection of superior clones. The broad-sense heritability ( H^2 ) ranged from 0.01 ( D34 ) to 0.22 (H20), indicating low genetic effects on early growth. Phenotypic and genetic correlations between the growth traits at a specific age were large, while those between seven-month-old height and the elder growth decreased with age. Clones DH32-29, GL-9, and 1-082 were preliminarily selected out on basis of their superior growth.
出处
《广东林业科技》
2009年第6期22-26,共5页
Forestry Science and Technology of Guangdong Province
基金
贵州省"十五"农业与社会发展科技计划重点攻关项目(黔科合(2004)NGZ001)
中央级公益性科研院所基本科研业务费专项(RITF2008-4)
关键词
桉树
无性系
早期生长
广义遗传力
Eucalyptus, clone, growth, broad-sense heritability