Regional population expansion in Eucalyptus globulus

Yeoh, Suat Hui, Ho, Simon Y.W., Thornhill, Andrew H., and Foley, William J. (2013) Regional population expansion in Eucalyptus globulus. Molecular Phylogenetics and Evolution, 68 (3). pp. 498-501.

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Abstract

Foundation tree species define the structure of forest habitat and influence their ecosystem dynamics. However, there is limited understanding of both the patterns and timing of population fluctuations in foundation trees and how they vary among geographical regions. We have reconstructed the demographic history of five genetically distinct populations of the Tasmanian blue gum (Eucalyptus globulus ssp. globulus) at the species and regional levels, using three nuclear loci sequenced from 104 individuals. Analysis using a Bayesian skyline plot indicated that the species experienced two periods of expansion, commencing in the Pliocene. Regional analyses showed that island populations expanded earlier, but that the rate of expansion was relatively slow when compared to that of the mainland group. This highlights the need for local demographic history to be taken into account when inferring local adaptation for candidate genes. Population growth throughout the Quaternary signals the ability of the species to persist and thrive under the predominantly harsh conditions of this period.

Item ID: 35595
Item Type: Article (Research - C1)
ISSN: 1095-9513
Keywords: Bayesian skyline plot, demographic history, Eucalyptus globulus
Funders: Australian Research Council (ARC)
Date Deposited: 01 Oct 2014 15:53
FoR Codes: 06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060309 Phylogeny and Comparative Analysis @ 60%
06 BIOLOGICAL SCIENCES > 0603 Evolutionary Biology > 060302 Biogeography and Phylogeography @ 40%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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