邓恩桉生长、木材密度和树皮厚度的遗传变异研究  

Genetic Variation in Growth,Wood Density and Bark Thickness of Eucalyptus dunnii

作　　者：罗建中[1,2] Roger Arnold 项东云 谢耀坚[2] 陈健波 

机构地区：[1]南京林业大学,江苏南京210037 [2]国家林业局桉树研究开发中心,广东湛江524022 [3]广西壮族自治区林业科学院,广西南宁530001

出　　处：《林业科学研究》2009年第6期758-764,共7页Forest Research

基　　金：国家"十一五"科技支撑项目"高产优质桉树速生材树种新品种选育"(2006BAD01A1504);中国与澳大利亚合作研究项目(ACIARFST1996/125)研究内容

摘　　要：以广西桂林和柳州的邓恩桉种源/家系（6个种源53个家系）试验林为材料,对8.5年生胸径以及10.5年生胸径、树高、材积、木材密度和树皮厚度的遗传变异进行了研究,结果表明：10.5年生时,邓恩桉在桂林和柳州的平均单株材积分别为0.218、0.189 m^3,平均木材密度分别为521.0、483.7 kg.m^-3,树皮厚度分别为1.15、1.26 cm;10.5年生材积性状和木材密度在种源间差异不显著（P〉0.10）,10.5年生木材密度在家系间差异显著（P〈0.05）;树皮厚度在种源间、家系间差异均不显著（P〉0.10）。除8.5年生胸径外,其他性状的试验地点与种源间交互作用不显著（P〉0.10）;8.5年生胸径、10.5年生树高、木材密度均存在显著的试验地点与家系间交互作用（P〈0.05）;10.5年生树皮厚在种源、家系水平上和地点均不存在显著的交互作用。8.5年生胸径、10.5年生胸径与树高的遗传力在0.1289-0.2345间,木材密度的遗传力为0.7000-0.9629,树皮厚度的遗传力为0.1053-0.3357。Two Eucalyptus dunnii provenance-family trials that included 53 families representing 6 provenances at Guilin and Liuzhou in Guangxi, were used to study the genetic variation and genotype by environment interaction for diameter at breast height （DBH） at 8.5-years, and DBH, height, stem volume, wood density and bark thickness at 10.5-years. The 10.5 year results showed： the mean volumes of individual trees at Guilin and Liuzhou were 0.218 and 0. 189 m^3, the average wood basic densities were 521.0 and 483.7 kg · m^-3 respectively; and, the average bark thicknesses at breast height were 1.15 and 1.26 cm respectively. For the 10.5-years＇ growth traits and wood density, there were no significant differences among provenances （P 〉 0.10 ） , but significant differences among families （within provenances） for 10.5-years wood density （P 〈 0.05 ）. However, there were no significant differences （P 〉 0. 10 ） at any level for bark thickness at breast height, including no significant genotype by environment interactions for this trait. There were no significant interaction between sites and provenances （P 〉0.10） for all the traits except 8.5-years DBH, but significant interactions between sites and families （within provenance） （P 〈0.05 ）were found for all the traits studied except 10.5-years DBH. The heritabilities of DBH at 8.5-years and 10.5-years DBH and height were between 0. 128 9 -0.234 5, the heritability of wood basic density were 0. 700 0 -0. 962 9, bark thickness were 0. 105 3 -0. 335 7.

关 键 词：邓恩桉 遗传变异 生长 木材密度 树皮厚度 

分 类 号：S792.39[农业科学—林木遗传育种] S781[农业科学—林学]