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首页> 外文期刊>Holzforschung >Genotypic variation in the basic density, dynamic modulus of elasticity and tracheid traits of Pinus elliottii in three progeny trials in southern China
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Genotypic variation in the basic density, dynamic modulus of elasticity and tracheid traits of Pinus elliottii in three progeny trials in southern China

机译：华南地区三个子代试验中松果的基本密度，动态弹性模量和气管性状的基因型变化

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摘要

A firm understanding of the genetic relationships among wood properties is a prerequisite for breeding for higher wood quality in Pinus elliottii families. To examine and deal with such relationships, increment cores were sampled at breast height from 1260 trees in 42 open-pollinated families in three 27-year-old Slash pine progeny trials in southern China, and genetic variation, genotype-by-environment (G x E) interaction, genetic correlation and correlated response were investigated. The basic density (BD), dynamic modulus of elasticity (MOED) and tracheid traits were found to be under moderate to strong genetic control for the three locations combined, with individual narrow-sense and family mean heritability ranging from 0.28 to 0.44 and 0.52 to 0.69, respectively. Type B genetic correlation estimates indicated that the G x E interaction had a small-level influence on wood properties. Strong genetic correlations (r(g)) were found between BD and MOED at the three sites (r(g) = 0.46-0.85), and BD or MOE, showed moderate to strong correlations with most tracheid traits at specific localities. In tree breeding programs, one possible strategy would be to improve pulpwood quality and the strength of structural wood through selection for different wood quality traits.
机译：深入了解木材特性之间的遗传关系是培育松木家系更高木材质量的先决条件。为了检查和处理这种关系，在中国南方的三项27岁的Slash pine子代试验中，从42个开放授粉家庭的1260棵树的胸高处对增量核心进行了采样，以及遗传变异，基因型（按环境）（G X E）相互作用，遗传相关性和相关的反应进行了调查。发现这三个位置的基本密度（BD），动态弹性模量（MOED）和气管性状处于中等至强的遗传控制之下，个体的狭义感和家族平均遗传力范围从0.28至0.44和0.52至分别为0.69。 B型遗传相关性估计表明，G x E相互作用对木材特性有较小的影响。在三个位点（r（g）= 0.46-0.85）处发现BD和MOED之间存在强遗传相关性（r（g）），而BD或MOE在特定位置与大多数气管性状显示出中等至强相关性。在树木育种计划中，一种可能的策略是通过选择不同的木材品质性状来提高纸浆品质和结构木材的强度。

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