| 摘要: |
| 运用BLUP模型对不同林龄尾叶桉家系进行家系和个体遗传值评估，同时进行了主成分分析。结果表明：不同林龄尾叶桉自由授粉家系在树高、胸径、单株材积存在显著的差异。不同林龄家系遗传力存在着差异，其中家系遗传力大于单株遗传力。随着林龄的增大，树高、胸径和材积在家系遗传力和单株遗传力上均呈现先缓慢增大，然后逐步变小的趋势。早晚性状之间存在显著相关性。尾叶桉家系选择可从第3年开始。根据主成分分析获得综合性状权重，利用秩次排名得分，选出优良家系。 |
| 关键词: 尾叶桉 BLUP 遗传力 家系选择 |
| DOI： |
| 分类号: |
| 基金项目:国营林场开发总公司课题 |
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| Studied on Heritability Estimation and Selection of E.urophylla Family |
|
chenwenping
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| Abstract: |
| Family heritability and individe heritability of E.urophylla family in different forest age were estimated by BLUP method, and fine families were evaluated and selected. The results showed that there were highly significant differences in growth of tree height (H) and diameter at breast height (D) and volume (V) among families by variance analysis. there were also differences in family heritability and individe heritability from different forest age. Family heritability was more than individe heritability. Family heritability and individe heritability of tree height and diameter and volume increased moderately, then decreased with forts age. There were great correlation between growth traits in different forest age by correlation analysis and principal component regression analysis, this indicated that the early and late correlation of growth traits was helpful to family selection. These results were showed that the selection time of E.urophylla family was from 3 year old. At last the fine families were evaluated and selected by family rank based on the estimated data from the BLUP method. |
| Key words: E.urophylla BLUP heritability family selection |
