LenzCloutierMacKayEtAl2010

Référence

Lenz, P., Cloutier, A., MacKay, J., Beaulieu, J. (2010) Genetic control of wood properties in Picea glauca - An analysis of trends with cambial age. Canadian Journal of Forest Research, 40(4):703-715. (Scopus )

Résumé

We investigated the genetic control of wood properties as a function of cambial age to enable improvement of juvenile wood attributes in white spruce (Picea glauca (Moench) Voss). Increment cores were taken from 375 trees randomly selected from 25 open-pollinated families in a provenance-progeny trial repeated on three sites. High-resolution pith-to-bark profiles were obtained for microfibril angle (MFA), modulus of elasticity (MOE), wood density, tracheid diameter and cell wall thickness, fibre coarseness, and specific fibre surface with the SilviScan technology. Heritability estimates indicated that genetic control of cell anatomy traits and wood density increased with cambial age, whereas the genetic control of MFA and MOE remained relatively low across growth rings. Wood density, radial cell diameter, cell wall thickness, and specific fibre surface were highly heritable, indicating that significant genetic gains could be expected in tree improvement programs, although cambial age at selection may strongly influence the magnitude of realized gains. In contrast, growth-related properties, such as ring width, core length, and tree height, gave weak or nonsignificant heritability estimates. Adverse correlations between mechanical strength and properties related to paper quality suggest that breeding strategies must incorporate both types of traits to improve white spruce wood quality for different end uses.

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@ARTICLE { LenzCloutierMacKayEtAl2010,
    AUTHOR = { Lenz, P. and Cloutier, A. and MacKay, J. and Beaulieu, J. },
    TITLE = { Genetic control of wood properties in Picea glauca - An analysis of trends with cambial age },
    JOURNAL = { Canadian Journal of Forest Research },
    YEAR = { 2010 },
    VOLUME = { 40 },
    PAGES = { 703-715 },
    NUMBER = { 4 },
    ABSTRACT = { We investigated the genetic control of wood properties as a function of cambial age to enable improvement of juvenile wood attributes in white spruce (Picea glauca (Moench) Voss). Increment cores were taken from 375 trees randomly selected from 25 open-pollinated families in a provenance-progeny trial repeated on three sites. High-resolution pith-to-bark profiles were obtained for microfibril angle (MFA), modulus of elasticity (MOE), wood density, tracheid diameter and cell wall thickness, fibre coarseness, and specific fibre surface with the SilviScan technology. Heritability estimates indicated that genetic control of cell anatomy traits and wood density increased with cambial age, whereas the genetic control of MFA and MOE remained relatively low across growth rings. Wood density, radial cell diameter, cell wall thickness, and specific fibre surface were highly heritable, indicating that significant genetic gains could be expected in tree improvement programs, although cambial age at selection may strongly influence the magnitude of realized gains. In contrast, growth-related properties, such as ring width, core length, and tree height, gave weak or nonsignificant heritability estimates. Adverse correlations between mechanical strength and properties related to paper quality suggest that breeding strategies must incorporate both types of traits to improve white spruce wood quality for different end uses. },
    COMMENT = { Export Date: 4 October 2010 Source: Scopus CODEN: CJFRA doi: 10.1139/X10-014 },
    ISSN = { 00455067 (ISSN) },
    KEYWORDS = { Cambial age, Cell diameters, Cell-wall thickness, End-uses, Fibre surfaces, Genetic control, Genetic gain, Growth rings, Heritability estimates, High resolution, Increment core, Juvenile woods, Mechanical strength, Microfibril angles, Modulus of elasticity, Open-pollinated families, Paper quality, Picea glauca, Ring width, SilviScan technology, Tracheid diameter, Tree height, Tree Improvement Program, White spruce, Wood density, Genetic engineering, Hardwoods, Mechanical properties, Forestry, anatomy, coniferous tree, elastic modulus, genetic structure, growth rate, heritability, juvenile, reproductive strategy, tree ring, wood quality, Cell Wall Thickness, Diameter, Elastic Strength, Fibers, Fibrils, Fineness, Forestry, Genetic Engineering, Hardwoods, Mechanical Properties, Picea Engelmannii, Wood Density, Wood Properties, Picea glauca },
    OWNER = { Luc },
    TIMESTAMP = { 2010.10.04 },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-77951690900&partnerID=40&md5=0ee9852d3895b55380b2a0e918ff6020 },
}

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