Effects of domestication on genetic diversity in Eucalyptus globulus

T H Jones; Dorothy A Steane; R C Jones; D Pilbeam; R E Vaillancourt; Brad M Potts

doi:10.1016/j.foreco.2006.06.021

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Effects of domestication on genetic diversity in Eucalyptus globulus

Journal article

Peer reviewed

Effects of domestication on genetic diversity in Eucalyptus globulus

T H Jones, Dorothy A Steane, R C Jones, D Pilbeam, R E Vaillancourt and Brad M Potts

Forest Ecology and Management, Vol.234(1-3), pp.78-84

2006

DOI: https://doi.org/10.1016/j.foreco.2006.06.021

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Abstract

Agricultural and Veterinary Sciences

Environmental Sciences

Biological Sciences

genetic diversity

breeding program

allelic richness

eucalyptus globulus

heterozygosity

bottleneck

With the Australian national Eucalyptus globulus breeding program entering its third generation, monitoring of genetic diversity is becoming increasingly important due to selection having the potential to reduce genetic diversity over time. To provide a baseline estimate of genetic diversity within the Australian national E. globulus breeding program, microsatellite markers were used to quantify and compare the genetic diversity of 140first-generation selections to that observed in a sample of 340 mature individuals collected from throughout the native distribution of the species. While expected heterozygosity was high in the breeding population sample, and similar to that displayed in the native sample, allelic richness was lower, suggesting a loss of rare alleles during selection. Observed heterozygosity (individual heterozygosity), however, was consistently higher inbreeding population samples than that seen in native samples, suggesting that heterozygotes have been preferentially selected within the program.The importance of maintaining genetic diversity in breeding programs and the benefit of conserving native populations as a resource of genetic diversity is discussed in relation to the long-term management of tree breeding programs.

Details

Title: Effects of domestication on genetic diversity in Eucalyptus globulus
Authors: T H Jones (Author) - University of Tasmania
Dorothy A Steane (Author) - University of Tasmania
R C Jones (Author) - University of Tasmania
D Pilbeam (Author) - Southern Tree Breeding Association Inc, Australia
R E Vaillancourt (Author) - University of Tasmania
Brad M Potts (Author) - University of Tasmania
Publication details: Forest Ecology and Management, Vol.234(1-3), pp.78-84
Publisher: Elsevier BV
Date published: 2006
DOI: 10.1016/j.foreco.2006.06.021
ISSN: 0378-1127
Organisation Unit: University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99450274102621
Output Type: Journal article

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