Comparative Performance of Corymbia Hybrids and Parental Species in Subtropical Queensland and Implications for Breeding and Deployment

David J Lee; J R Huth; Jeremy T Brawner; Geoffrey R Dickinson

doi:10.1515/sg-2009-0026

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Comparative Performance of Corymbia Hybrids and Parental Species in Subtropical Queensland and Implications for Breeding and Deployment

Journal article

Peer reviewed

Comparative Performance of Corymbia Hybrids and Parental Species in Subtropical Queensland and Implications for Breeding and Deployment

David J Lee, J R Huth, Jeremy T Brawner and Geoffrey R Dickinson

Silvae Genetica, Vol.58(5-6), pp.205-212

2009

DOI: https://doi.org/10.1515/sg-2009-0026

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Abstract

spotted gums

hybrid

Corymbia

Eucalypt

Quambalaria

breeding strategy

deployment

heritability

genetic parameters

Eighty six full-sib Corymbia F1 hybrid families (crosses between C. torelliana and four spotted gum taxa: C. citriodora subsp. variegata, C. citriodora subsp. citriodora, C. henryi and C. maculata), were planted in six trials across six disparate sites in south-eastern Queensland to evaluate their productivity and determine their potential utility for plantation forestry. In each trial, the best-growing 20% of hybrid families grew significantly faster (P = 0.05) than open-pollinated seedlots of the parent species Corymbia citriodora subsp. variegata, ranging from 107% to 181% and 127% to 287% of the height and diameter respectively. Relative performance of hybrid families growing on more than one site displayed consistency in ranking for growth across sites and analysis showed low genotype-by-environment interaction. Heritability estimates based on female and male parents across two sites at age six years for height and diameter at breast height, were high (0.62±0.28 to 0.64±0.35 and 0.31±0.21 to 0.69±0.37 respectively), and low to moderate (0.03±0.04 to 0.33±0.22) for stem straightness, branch size, incidence of ramicorns, and frost and disease resistance traits at ages one to three years. The proportion of dominance variance for height and diameter had reduced to zero by age six years. Based on these promising results, further breeding and pilot-scale family forestry and clonal forestry deployment is being undertaken. These results have also provided insights regarding the choice of a future hybrid breeding strategy.

Details

Title: Comparative Performance of Corymbia Hybrids and Parental Species in Subtropical Queensland and Implications for Breeding and Deployment
Authors: David J Lee (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
J R Huth (Author) - Queensland Primary Industries and Fisheries
Jeremy T Brawner (Author) - CSIRO
Geoffrey R Dickinson (Author) - University of the Sunshine Coast - Faculty of Science, Health and Education
Publication details: Silvae Genetica, Vol.58(5-6), pp.205-212
Publisher: J.D. Sauerlaender's Verlag
Date published: 2009
DOI: 10.1515/sg-2009-0026
ISSN: 0037-5349
Organisation Unit: School of Science and Engineering - Legacy; Tropical Forests and People Research Centre; University of the Sunshine Coast, Queensland; GeneCology Research Centre - Legacy; Forest Industries Research Centre; Forest Research Institute
Language: English
Record Identifier: 99449666902621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Forestry; Genetics & Heredity

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