Genetic variation in growth, stem straightness, pilodyn and dynamic modulus of elasticity in second-generation progeny tests of Acacia mangium at three sites in Vietnam
Genetic variation in growth, stem straightness, pilodyn and dynamic modulus of elasticity in second-generation progeny tests of Acacia mangium at three sites in Vietnam
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越南三个地点马占相思第二代后代试验中生长、茎直度、毛毛和动态弹性模量的遗传变异
DOI：
10.1007/s11056-015-9484-6
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发表时间：
2015
期刊：
影响因子：
2.2
通讯作者：
T. Ha
中科院分区：
文献类型：
--
作者：
P. H. Hai;L. Duong;Nguyen Quoc Toan;T. Ha
在越南北部宣光和巴维以及南部巴乌邦种植的三个第二代后代测试中，对来自六个不同遗传群体的 164 个马占相思开放授粉家族进行了测试。在三项试验中，对所有树木进行了测量，以估计生长性状、茎直度和毛毛长度的个体遗传力和遗传相关性，并且仅在宣光省评估了直立树木的动态弹性模量（MoEd）。家系之间的生长性状、茎直度、pilodyn 渗透度和预测的 MoEd 存在显着差异。生长性状、茎直度、毛毛和动态弹性模量的遗传力为低至中等（h2 = 0.11-0.30）。 DBH、pilodyn 和 MoEd 的加性遗传变异系数在 3 岁或 4 岁时处于中等水平（CVa= 4.9–9.4%）。茎直度、毛毛长度和生长性状之间的遗传相关性较好但较弱，而生长性状和动态弹性模量之间的遗传相关性较弱且不利。加性遗传变异的显着系数和所有性状的显着遗传力表明，应该可以使用一种将生长、茎直度和木材质量的改进结合起来的选择策略。越南曼吉明。两个北部试验与 Bau Bang 地点之间的地点间遗传相关性在生长性状方面较低，表明 G × E 效应对于生长具有实际重要性，不同地点需要不同的部署种群。
164 open-pollinated families ofAcacia mangiumfrom six different genetic groups were tested in three second-generation progeny tests planted at Tuyen Quang and Ba Vi in northern Vietnam and Bau Bang in the south. All trees were measured to estimate individual heritabilities and genetic correlations for growth traits, stem straightness and pilodyn in the three trials, and dynamic modulus of elasticity (MoEd) of standing trees was only assessed in Tuyen Quang. There were significant differences between families for growth traits, stem straightness, pilodyn penetration and predicted MoEd. Heritabilities of growth traits, stem straightness, pilodyn and dynamic modulus of elasticity were low to moderate (h2= 0.11–0.30). The coefficient of additive genetic variation for DBH, pilodyn and MoEdwere moderate at age 3 or 4 years (CVa= 4.9–9.4 %). Genetic correlations between stem straightness, pilodyn and growth traits were favourable but weak, while those between growth traits and dynamic modulus of elasticity were weak and unfavourable. The substantial coefficients of additive genetic variation and significant heritabilities for all traits indicate that it should be possible to use a selection strategy that combines improvements in growth, stem straightness, and wood quality forA. mangiumin Vietnam. The site–site genetic correlations between the two northern trials and Bau Bang site were low for growth traits, indicating that G × E effects are of practical importance for growth and different deployment populations will be required for different sites.