Within-tree radial and among-family variations in wood density, microfibril angle, and mechanical properties in Picea glehnii
Within-tree radial and among-family variations in wood density, microfibril angle, and mechanical properties in Picea glehnii
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DOI：
10.14214/sf.9914
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发表时间：
2018
期刊：
影响因子：
1.8
通讯作者：
Jun Tanabe;F. Ishiguri;A. Tamura;Y. Takashima;J. Ohshima;K. Iizuka;S. Yokota
中科院分区：
文献类型：
--
作者：
Jun Tanabe;F. Ishiguri;A. Tamura;Y. Takashima;J. Ohshima;K. Iizuka;S. Yokota
木材机械性能的遗传改良对于云杉等木材用林业物种很重要。弹性模量（莫伊）、断裂模量（莫尔）及其相关性状的树内径向和家系变异[即，测定了9个云杉自由授粉家系晚材管胞S2层的微纤丝角（MFA）和气干密度（AD）。施密特）马斯特。莫尔的径向变化主要受AD的影响，而莫伊则受MFA和AD的影响。方差分析和变异系数的F值在第6 - 15轮，观察到的所有性能，除了AD在第6 - 10轮。这一结果表明，在这些高度可变的区域中，遗传效应的贡献更大。此外，6 ~ 15轮木材材性与其平均值呈正相关。因此，对莫伊、莫尔及其相关性状的遗传改良可能在幼龄材中更有效，特别是在从髓心开始的第6 - 15个年轮。
Genetic improvements in the mechanical properties of wood are important in forestry species used for lumber, such as Picea. The within-tree radial and among-family variations for the modulus of elasticity (MOE), modulus of rupture (MOR), and their related traits [i.e., microfibril angle (MFA) of the S2 layer in latewood tracheid and air-dry density (AD)] were evaluated in nine open-pollinated families of Picea glehnii (F. Schmidt) Mast. The radial variation in MOR was mainly affected by AD, whereas MOE was affected by MFA and AD. Higher F-values obtained by analysis of variance and coefficient of variation were observed for all properties at the 6th–15th annual ring, except for AD at the 6th–10th annual ring. This result suggests that the contribution of genetic effect is larger in these highly variable regions. In addition, positive correlation coefficients were obtained between wood properties at the 6th–15th annual ring and mean values of these properties. Therefore, genetic improvements for MOE, MOR, and their related traits in P. glehnii is likely to be more effective in juvenile wood, specifically at the 6th–15th annual ring from the pith.