Phenotypic and Genotypic Correlations for Wood Properties of Hybrid Poplar Clones of Southern Quebec

Forests

Roger E. Hernández¹  Alain Cloutier¹  Yves Fortin¹  Ahmed Koubaa²  A.S.M. Azmul Huda²  Pierre Périnet³ 

[1] Des Sciences du Bois et de la Forêt, Université Laval, Québec, QC G1V 0A6, Canada;Institut de Recherche sur les Forêts, Université du Québec en Abitibi-Témiscamingue, 445 boul. de l’Université, Rouyn-Noranda, QC J9X 5E4, Canada;Ministère des Forêts, de la Faune et des Parcs du Québec, Québec, QC G1P 3W8, Canada;

关键词: hybrid poplar;    phenotypic correlations;    genotypic correlations;    wood anatomical;    physical and mechanical properties;   

DOI  :  10.3390/f9030140

来源: DOAJ

【 摘 要 】

This study aims to understand the phenotypic and genotypic correlations among wood anatomical, physical, and mechanical properties of hybrid poplar clones. Samples were taken from seven clones grown on three sites in Southern Quebec, Canada. Five trees per clone were randomly sampled from each site to measure anatomical (fiber length, fiber proportion, vessel proportion, fiber wall thickness, tension wood), physical (basic density, volumetric, longitudinal, tangential, and radial shrinkage), and mechanical wood properties (flexural modulus of elasticity (MOE), modulus of rupture (MOR), ultimate crushing strength parallel to the grain). The observed phenotypic and genotypic correlations between these wood properties were moderate to strong, except for fiber length and vessel proportion. Genotypic correlations for all wood properties were higher than for corresponding phenotypic correlations. Furthermore, fiber length showed weak correlations, whereas, vessel proportion showed strongly negative correlations with all other properties. Strong correlations were also found among fiber proportion, fiber wall thickness, basic density, and mechanical properties. Furthermore, results from this study show close genotypic and phenotypic correlations between fiber proportion, fiber wall thickness, and wood density, which consequently affect the mechanical performance of wood products. These findings indicate that there is a substantial opportunity to improve wood quality by selecting several wood properties for different end uses.

【 授权许可】

Unknown