Genetic parameters of red mahogany breeding populations grown in the tropics

Jeremy T Brawner; D J Bush; Paul MacDonell; Paul Warburton; P A Clegg

doi:10.1080/00049158.2010.10676324

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Genetic parameters of red mahogany breeding populations grown in the tropics

Journal article

Peer reviewed

Genetic parameters of red mahogany breeding populations grown in the tropics

Jeremy T Brawner, D J Bush, Paul MacDonell, Paul Warburton and P A Clegg

Australian Forestry, Vol.73(3), pp.901-999

2010

DOI: https://doi.org/10.1080/00049158.2010.10676324

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Abstract

Forestry Sciences

tree breeding

genetic variation

genetic parameters

heritability

genotype environment interaction

breeding value

provenance trials

progeny testing

Eucalyptus pellita

The expansion of red mahogany (Eucalyptus pellita) plantations in the wet tropics of northern Australia has increased interest in the domestication of the species. A review of an overseas breeding population was undertaken to enhance our current understanding of genetic parameters for E. pellita, which are essential for the development of advanced-generation breeding programs. The large genetic differences between and within provenances, as well as the moderate heritability estimates for growth and form traits, imply that tree breeding can create improved breeds and reduce variability in plantation forests. Our analysis suggests that breeding value predictions of parents tested in first-generation provenance-progeny trials are less indicative of an individual's genetic merit than breeding values generated from second-generation trials. The low heritability estimate in the first generation relative to the second generation and the reduced inter-generational correlations will influence the level of genetic gain that can be realised. The implications of these findings for the management of E. pellita breeding populations and the production of improved seed for plantation forestry in the tropics are discussed.

Details

Title: Genetic parameters of red mahogany breeding populations grown in the tropics
Authors: Jeremy T Brawner (Author) - CSIRO
D J Bush (Author) - CSIRO
Paul MacDonell (Author) - CSIRO
Paul Warburton (Author) - CSIRO
P A Clegg (Author) - Toba Pulp Lestari, Indonesia
Publication details: Australian Forestry, Vol.73(3), pp.901-999
Publisher: Taylor & Francis Australasia
Date published: 2010
DOI: 10.1080/00049158.2010.10676324
ISSN: 0004-9158
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: 99449329102621
Output Type: Journal article

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