Please use this identifier to cite or link to this item: https://doi.org/10.1111/j.1365-294X.2005.02697.x
Title: Invasion success and genetic diversity of introduced populations of guppies Poecilia reticulata in Australia
Authors: Lindholm, A.K.
Breden, F.
Alexander, H.J.
Chan, W.-K. 
Thakurta, S.G.
Brooks, R.
Keywords: Additive genetic variation
Bottleneck
Introduced species
Invasion success
Neutral genetic diversity
Poecilia reticulata
Issue Date: Oct-2005
Citation: Lindholm, A.K., Breden, F., Alexander, H.J., Chan, W.-K., Thakurta, S.G., Brooks, R. (2005-10). Invasion success and genetic diversity of introduced populations of guppies Poecilia reticulata in Australia. Molecular Ecology 14 (12) : 3671-3682. ScholarBank@NUS Repository. https://doi.org/10.1111/j.1365-294X.2005.02697.x
Abstract: High genetic diversity is thought to characterize successful invasive species, as the potential to adapt to new environments is enhanced and inbreeding is reduced. In the last century, guppies, Poecilia reticulata, repeatedly invaded streams in Australia and elsewhere. Quantitative genetic studies of one Australian guppy population have demonstrated high additive genetic variation for autosomal and Y-linked morphological traits. The combination of colonization success, high heritability of morphological traits, and the possibility of multiple introductions to Australia raised the prediction that neutral genetic diversity is high in introduced populations of guppies. In this study we examine genetic diversity at nine microsatellite and one mitochondrial locus for seven Australian populations. We used mtDNA haplotypes from the natural range of guppies and from domesticated varieties to identify source populations. There were a minimum of two introductions, but there was no haplotype diversity within Australian populations, suggesting a founder effect. This was supported by microsatellite markers, as allelic diversity and heterozygosity were severely reduced compared to one wild source population, and evidence of recent bottlenecks was found. Between Australian populations little differentiation of microsatellite allele frequencies was detected, suggesting that population admixture has occurred historically, perhaps due to male-biased gene flow followed by bottlenecks. Thus success of invasion of Australia and high additive genetic variance in Australian guppies are not associated with high levels of diversity at molecular loci. This finding is consistent with the release of additive genetic variation by dominance and epistasis following inbreeding, and with disruptive and negative frequency-dependent selection on fitness traits. © 2005 Blackwell Publishing Ltd.
Source Title: Molecular Ecology
URI: http://scholarbank.nus.edu.sg/handle/10635/100965
ISSN: 09621083
DOI: 10.1111/j.1365-294X.2005.02697.x
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

105
checked on Jul 9, 2018

WEB OF SCIENCETM
Citations

99
checked on May 29, 2018

Page view(s)

12
checked on Mar 11, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.