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Open AccessArticle

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

1
Institut de Recherche sur les Forêts, Université du Québec en Abitibi-Témiscamingue, 445 boul. de l’Université, Rouyn-Noranda, QC J9X 5E4, Canada
2
Des Sciences du Bois et de la Forêt, Université Laval, Québec, QC G1V 0A6, Canada
3
Ministère des Forêts, de la Faune et des Parcs du Québec, Québec, QC G1P 3W8, Canada
*
Author to whom correspondence should be addressed.
This manuscript is an extended version of a paper published in the proceedings of the 2nd Conference on EngineeredWood Products based on Poplar/willowWood CEWPPW2, pp. 1–13, 2016. The manuscript is also part of the Ph.D. thesis of the first author available online at depositium.uqat.ca.
Forests 2018, 9(3), 140; https://doi.org/10.3390/f9030140
Received: 20 December 2017 / Revised: 9 March 2018 / Accepted: 14 March 2018 / Published: 15 March 2018
(This article belongs to the Special Issue Wood Property Responses to Silvicultural Treatments)
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. View Full-Text
Keywords: hybrid poplar; phenotypic correlations; genotypic correlations; wood anatomical; physical and mechanical properties hybrid poplar; phenotypic correlations; genotypic correlations; wood anatomical; physical and mechanical properties
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Huda, A.A.; Koubaa, A.; Cloutier, A.; Hernández, R.E.; Périnet, P.; Fortin, Y. Phenotypic and Genotypic Correlations for Wood Properties of Hybrid Poplar Clones of Southern Quebec. Forests 2018, 9, 140.

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