Genetic control of Eucalyptus globulus harvest traits

Matthew Hamilton; Mauricio Acuna; John Wiedemann; Richard Mitchell; David J Pilbeam; Mark W Brown; Brad M Potts

doi:10.1139/cjfr-2014-0428

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Genetic control of Eucalyptus globulus harvest traits

Journal article

Open access

Peer reviewed

Genetic control of Eucalyptus globulus harvest traits

Matthew Hamilton, Mauricio Acuna, John Wiedemann, Richard Mitchell, David J Pilbeam, Mark W Brown and Brad M Potts

Canadian Journal of Forest Research, Vol.45(6), pp.615-624

2015

DOI: https://doi.org/10.1139/cjfr-2014-0428

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Abstract

harvest productivity

additive genetic variation

dominance genetic variation

inbreeding depression

standing tree traits

The cost of harvesting short-rotation plantation eucalypts can be in excess of AU$2500 ha-1. Despite this high cost, the extent to which harvesting productivity is affected by tree genetics is not well understood. We address this issue in a study of two ten-year-old genetics field trials of Eucalyptus globulus in Australia. Standing-tree traits analysed were survival, diameter at breast height, basal area, stem straightness and forking. Harvest traits were volume, harvest time and harvest productivity (m3 min-1). Genetic group and within-group genetic variation (additive and dominance), stand-level family variation, phenotypic and genetic correlations, and the effects of inbreeding were estimated for these traits. The different scenarios studied showed that plantation harvest productivity was affected by tree genetics to some degree, but mainly through positive co-variation with stem diameter. Harvest productivity is thus unlikely to have been adversely affected by past selection. While no significant additive or dominance genetic variation in forking or stem straightness was detected, weak phenotypic correlations were consistent with harvest productivity being higher in straighter trees with no forking. High inbreeding depression was evident for growth and survival, but in open-pollinated progeny this resulted in only a slight reduction in harvest productivity (5.5%) compared with out-crossed progeny.

Details

Title: Genetic control of Eucalyptus globulus harvest traits
Authors: Matthew Hamilton (Author) - University of Tasmania
Mauricio Acuna (Author) - University of the Sunshine Coast
John Wiedemann (Author) - Western Australian Plantation Resources (WAPRES)
Richard Mitchell (Author) - University of the Sunshine Coast
David J Pilbeam (Author) - Southern Tree Breeding Association Inc.
Mark W Brown (Author) - University of the Sunshine Coast
Brad M Potts (Author) - University of Tasmania
Publication details: Canadian Journal of Forest Research, Vol.45(6), pp.615-624
Publisher: N R C Research Press
Date published: 2015
DOI: 10.1139/cjfr-2014-0428
ISSN: 0045-5067
Copyright note: Copyright © 2015 The Author. The accepted manuscript is reproduced here in accordance to the publisher's copyright policy. The definitive version is available at http://dx.doi.org/10.1139/cjfr-2014-0428
Organisation Unit: Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; Forest Industries Research Centre; Forest Research Institute
Language: English
Record Identifier: 99448613702621
Output Type: Journal article

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