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Genetic correlations between pulpwood and solid-wood selection and objective traits in Eucalyptus globulus

Citation

Hamilton, MG and Potts, BM and Greaves, BL and Dutkowski, GW, Genetic correlations between pulpwood and solid-wood selection and objective traits in Eucalyptus globulus, Annals of Forest Science, 67, (5) pp. 511p1-511p10. ISSN 1286-4560 (2010) [Refereed Article]


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Copyright Statement

Copyright 2010 INRA, EDP Sciences

DOI: doi:10.1051/forest/2010013

Abstract

If selective breeding is to be successful, significant genetic variation must be present in the traits targeted for improvement (i.e. "objective traits"). This study aimed to quantify genetic variation in Eucalyptus globulus pulpwood and sawn-timber objective traits (rotation-age whole-tree volume, survival, whole-tree basic density, sawn-board Janka hardness and sawn-board internal checking) and estimate additive genetic correlations between these and inexpensively-assessed "selection traits". Significant genetic variation was identified in all objective traits at the subrace and/or family within subrace level. Selection-age diameter at breast height (1.3 m, DBH) was strongly genetically correlated with rotation-age volume (0.78) and survival (0.82). Subrace and additive genetic correlations of selectionage Pilodyn penetration with rotation-age 12--12-mm-sample basic density (0.70 and 0.75 respectively) and whole-tree basic density (0.83 and 0.91 respectively) were also strong. No significant subrace or additive genetic correlation between wood-sample gross shrinkage and sawn-board internal checking was detected. However, subrace and additive genetic correlations of sawn-board Janka hardness with Pilodyn penetration (0.75 and 0.58 respectively) and sample gross shrinkage (0.77 and 0.73 respectively) were significantly different from zero. These findings suggest that genetic improvement of the examined objective traits is possible through selective breeding, although none of the assessed selection traits were strongly correlated with internal checking.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Forestry Sciences
Research Field:Tree Improvement (Selection and Breeding)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood Plantations
UTAS Author:Hamilton, MG (Dr Matthew Hamilton)
UTAS Author:Potts, BM (Professor Brad Potts)
UTAS Author:Greaves, BL (Dr Bruce Greaves)
UTAS Author:Dutkowski, GW (Mr Greg Dutkowski)
ID Code:66768
Year Published:2010
Web of Science® Times Cited:7
Deposited By:Plant Science
Deposited On:2011-02-11
Last Modified:2014-11-13
Downloads:1 View Download Statistics

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