摘要
在福建省华安县建立的巨桉子代测定林，包含代表全分布区的150个自由受粉家系。对树高、胸径、枝角和木材基本密度进行研究的结果表明，生长性状在家系间存在着极显著的遗传差异，木材基本密度在种源间和家系间都存在着显著的差异。1、4、15、5号种源和A、B、C、D、E、F家系的木材基本密度都较大。生长性状与木材基本密度之间不存在显著的相关性。个体间在各性状上的变异幅度都很大，实施个体选择比家系选择能提高6－25％的增益量。利用木材基本密度和主要生长性状编制选择指数进行个体选择的效果最优。
A combined Provenance family progeny trial of Eucalyptus grandis was established in Fujian in 1990 using seeds provided by the Australian Tree Seed Centre with 18 provenances and 147 open-pollinated families representing the whole range. Research results from the trial indicated that there were very significant difference in growth characteristics between families, and significant difference in wood basic density between provenances/families at age 4 years. Provenance 1, 4, 15 and 5 as well as family group A, B, C, D, E and F had higher wood density than the others. There was not a significant correlation between growth characteristics and wood density- It was found that the more significant genetic variation existed in all the characteristics between individuals, and hence individual selection would exceed family selection in genetic gain by 6%- 25%. The more genetic gain can be achieved by individual selection based on se1ection index values.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1996年第6期500-508,共9页
Scientia Silvae Sinicae
基金
中国林业科学研究院项目
澳大利亚国际农业研究中心合作研究项目
关键词
巨桉
家系
生长性状
木材密度
引种
Eucalyptus grandis, Family, Growth characteristics, Wood density,Selection index
