| 摘要: |
| 为了解 1 a 生直干大叶相思 Acacia auriculiformis 不同家系的生长变异并对其进行早期选择, 研
究利用 SPSS 和 R 软件分析其 20 个半同胞子代家系胸径、 地径、 树高的遗传分化程度和遗传力, 以遗传
力最大的性状作为选择标准, 并通过 Duncan 多重比较法筛选该性状值排名前 4 的家系, 用最佳线性无偏
预测法 (Best linear unbiased prediction, BLUP) 估算该性状的家系 BLUP 值, 选择率为 20%。 结果表明,
树高、 胸径和地径在生长发育过程中均出现了较大的分化, 变异系数分别为 24. 41%、 36. 20%和 25. 47%;
3 个性状在区组间均达到极显著差异 (P<0. 01); 家系间胸径差异显著 (P<0. 05), 而树高和地径均为极
显著差异 (P<0. 01), 各性状的家系遗传力为 0. 387 1 ~ 0. 515 9, 其中树高和地径受到中等强度的遗传控
制, 胸径受到中弱强度的遗传控制, 地径遗传力最大。 相关分析表明各生长性状之间均呈极显著正相关
关系。 以地径作为此次选择标准, 多重比较结果显示, 家系 13、 15、 5 和 19 号的地径位列前 4; 选出地
径的 BLUP 值较高的家系为 13、 15、 5 和 19 号, 该结果与多重比较结果一致, 这些家系表型生长性状发
育较好, 且具有更好的遗传优势。 |
| 关键词: 直干大叶相思 遗传变异 BLUP 育种值 早期选择 |
| DOI： |
| 分类号: |
| 基金项目:福建省林业科技项目 (2024FKJ29), 福建省林木种苗科技攻关项目 (ZMGG-0709)。 |
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| Multi-trait Genetic Variation Analysis and Early Selection of Acacia auriculiformis |
|
lizejun
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Zhongxi State-owned Forest Farm in Zhangpu
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| Abstract: |
| To investigate the growth variation of 1-year-old Acacia auriculiformis and to carry out early selection, SPSS and R software were used to analyze the genetic variation of main growth traits of 20 half-sib
families of A. auriculiformis. The trait with the highest heritability was used as the selection criterion, and the
top 4 families with the trait value were screened by Duncan′s multiple comparisons. The Best linear unbiased
prediction (BLUP) methods were used to estimate the BLUP breeding value of this trait. The selection rate was
20%. The results showed that the tree height, DBH, and ground diameter showed significant differentiation
during growth and development, and the coefficient of variation was 24. 41%, 36. 20%, and 25. 47%, respectively. There were significant differences among the three traits (P<0. 01), among families, there were significant differences in DBH trait (P<0. 05), and there were significant differences in tree height and ground diameter traits (P<0. 01). The family heritability of each trait ranged from 0. 387 1 to 0. 515 9, in which tree height and ground diameter were controlled by medium strength, and DBH was controlled by medium weak strength,
and ground diameter had the highest heritability. Correlation analysis showed that there were significant positive
correlations among the growth traits. Using the ground diameter trait as the selection criterion, the multiple
comparison results indicated that families of No. 13, 15, 5, and 19 ranked top 4 in ground diameter. Four families of No. 13, 15, 5, and 19 with higher BLUP breeding values of ground diameter were selected, which was
completely consistent with the results of multiple comparisons. The phenotypic growth traits of these families
were well developed and had better genetic advantages. |
| Key words: Acacia auriculiformis genetic variation analysis BLUP breeding values early selection |
