细叶桉种源—家系选择  

Study on Selections of Provenance and Family for Eucalyptus tereticornis Liang Kunnan Zhou Wenlong

作　　者：梁坤南[1] 周文龙[1] 

机构地区：[1]中国林业科学研究院热带林业研究所

出　　处：《林业科学研究》1995年第3期252-257,共6页Forest Research

基　　金：1985~1992年中国林业科学研究院和澳大利亚国际农业研究中心(ACIAR)资助

摘　　要：对细叶桉３个种源５０个自由授粉家系的生长性状和形质性状进行种源间和家系间差异分析和家系遗传变异及相关分析，结果表明细叶桉主要性状种源间和家系间差异都极显著，种源间的差异大于家系间的差异，来自澳大利亚昆士兰州的Ｌａｕｒａ种源优于其它种源。细叶桉家系生长性状和形质性状呈中度至强度遗传；枝下高、干形和冠幅与生长性状遗传相关极显著。运用指数选择法对５０个家系进行多性状综合选择，初步选出５个优良家系，可望获得２２．２３％的综合遗传增益。The analyses of differences among provenances and families, the genetic vari-ation and genetic correlation on the growth and quality characters for 3 provenances and 50open-pollination families of Eucalyptus tereticornis were carried out. The results showed therewere highly significant differences among provenances and families on the main characters ofE. tereticornis. The differences among provenances were bigger than those among familieswithin provenance. Laura provenance from Queensland of Australia was superior to otherprovenances on the main characters. The growth and quality characters of E. tereticoreis fami-lies were moderately or strongly hereditary.Branch height,stem straightness and corwn hadhighly significant genetic correlations with the growth characters. The five families of E.tereticornis with fast growth and higher quality were selected by the lndex Selection Methodand the genetic gain in the selective index values reached 22.23%.

关 键 词：细叶桉 种源 家系 指数选择 

分 类 号：S792.390.4[农业科学—林木遗传育种]