细叶桉地理种源生长性状遗传变异的分析与评价  

An Analysis on Genetic Variation in Growth Characters of Geographical Provenances of Eucalyptus tereticornis

作　　者：徐建民[1] 吴坤明[2] 吴菊英 白嘉雨 

机构地区：[1]中国林业科学研究院热带林业研究所 [2]中国林业科学研究院热带林业研究所 助理研究员 [3]广州 510520 [4]广州 510520

出　　处：《林业科学研究》1993年第3期242-248,共7页Forest Research

基　　金：中澳国际合作项目<8848>"澳大利亚阔叶树种引种与栽培试验"

摘　　要：本文对细叶桉10个地理种源5年生6个性状的观测资料,运用数量遗传学原理和多元统计分析方法进行分析和评价。结果表明:细叶楼各性状差异极显著或显著,且受中至较强的遗传影响。性状间存在较强的表型和遗传相关。从综合遗传值分析得出,昆士兰种源优于新南威尔士和维多利亚种源,尤以13443(Kenney River)和13544(Gladstone)QLD种源为最好。用综合遗传值,计算了种源群体间的遗传距离,为该树种进一步的遗传改良提出建议。Ten provenances of Eucalyptus tereticornis introduced from Australia were analyzed and evaluated for 6 growth traits five years after planting on the semi-arid area in southwestern Hainan Island. Variance and covariance analyses were estimated to determine heritability of traits and genetic correlation between traits. The results showed that there were highly significant differences in all traits measured and they exerted medium or stronger degrees of genetic control on provenance level (0.36~0.83). The clear bole height, index of typhoon resistance and tree height were apparently inherited. Highly phenotypic and genetic correlations were found among traits. Provenance selection based on principal component values of genetics was made: provenances from Queensland were better than those from New South Wales and Victoria; two superior performance provenances, 13443 from Kennedy River QLD and 13544 from North Gladstone QLD were selected. According to the hereditary stability analysis, the heritability was slowly decreasing with the increase in the age of the tree. Some profitable suggestions were also provided for further improvement in future.

关 键 词：细叶桉 地理种源 遗传变异 生长 

分 类 号：S792.390.4[农业科学—林木遗传育种]