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Effects of domestication on genetic diversity in Eucalyptus globulus

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Jones, TH and Steane, DA and Jones, RC and Pilbeam, D and Vaillancourt, RE and Potts, BM (2006) Effects of domestication on genetic diversity in Eucalyptus globulus. Forest Ecology and Management, 234 (1-3). pp. 78-84.

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Abstract

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 140 first-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 in breeding 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.

Item Type: Article
Keywords: Allelic richness; Bottleneck; Breeding program; Eucalyptus globulus; Genetic diversity; Heterozygosity
Journal or Publication Title: Forest Ecology and Management
Page Range: pp. 78-84
Identification Number - DOI: 10.1016/j.foreco.2006.06.021
Additional Information: BM Potts. The definitive version is available online at http://www.sciencedirect.com/
Date Deposited: 14 Feb 2008 01:43
Last Modified: 18 Nov 2014 03:29
URI: http://eprints.utas.edu.au/id/eprint/3192
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