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Genetic parameters for lignin, extractives and decay in Eucalyptus globulus

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Poke, FS and Potts, BM and Vaillancourt, RE and Raymond, CA (2006) Genetic parameters for lignin, extractives and decay in Eucalyptus globulus. Annals of Forest Science, 63. pp. 813-821. ISSN 813-821

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Abstract

Eucalyptus globulus is grown in temperate regions of the world for pulp production. The chemical composition of its wood including the proportion of cellulose, lignin and extractives, make it highly suited to this purpose. This study analysed genetic variation in these traits and decay, for nine localities of E. globulus. Heritability estimates were also obtained, and the relationships between these traits and the physical wood traits and growth were examined. Significant genetic variation was found between localities for lignin content (Klason lignin and acid-soluble lignin contents) and decay. The only trait for which significant variation between families within locality was detected was acid-soluble lignin content, which resulted in this trait also having the only significant narrow-sense heritability (0.51  0.26). Family means heritabilities were high for lignin content, extractives content and decay (0.42-0.64). The chemical wood traits were highly correlated with each other both phenotypically and genetically, with important correlations found with density and microfibril angle. Correlations suggested that during selection for the breeding objective traits, it is likely that favourable states in the chemical wood traits, decay resistance and fibre properties are concurrently being selected, whereas growth may be selected for independently. This initial study provides a stepping stone for future studies where particular localities of the breeding population may be characterised further.

Item Type: Article
Keywords: correlation, Eucalyptus globulus, genetic variation, heritability, lignin, chemical wood properties
Journal or Publication Title: Annals of Forest Science
Page Range: pp. 813-821
ISSN: 813-821
Identification Number - DOI: 10.1051/forest:2006080
Additional Information: BM Potts.
Date Deposited: 19 Aug 2008 22:42
Last Modified: 18 Nov 2014 03:48
URI: http://eprints.utas.edu.au/id/eprint/7285
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