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The influence of stochastic and selective forces in the population divergence of female colour polymorphism in damselflies of the genus Ischnura

Sanchez Guillen, Rosa LU ; Hansson, Bengt LU ; Wellenreuther, Maren LU ; Svensson, Erik LU and Cordero-Rivera, A. T (2011) In Heredity 107(6). p.513-522
Abstract
Disentangling the relative importance and potential interactions of selection and genetic drift in driving phenotypic divergence of species is a classical research topic in population genetics and evolutionary biology. Here, we evaluate the role of stochastic and selective forces on population divergence of a colour polymorphism in seven damselfly species of the genus Ischnura, with a particular focus on I. elegans and I. graellsii. Colour-morph frequencies in Spanish I. elegans populations varied greatly, even at a local scale, whereas more similar frequencies were found among populations in eastern Europe. In contrast, I. graellsii and the other five Ischnura species showed little variation in colour-morph frequencies between... (More)
Disentangling the relative importance and potential interactions of selection and genetic drift in driving phenotypic divergence of species is a classical research topic in population genetics and evolutionary biology. Here, we evaluate the role of stochastic and selective forces on population divergence of a colour polymorphism in seven damselfly species of the genus Ischnura, with a particular focus on I. elegans and I. graellsii. Colour-morph frequencies in Spanish I. elegans populations varied greatly, even at a local scale, whereas more similar frequencies were found among populations in eastern Europe. In contrast, I. graellsii and the other five Ischnura species showed little variation in colour-morph frequencies between populations. FST-outlier analyses revealed that the colour locus deviated strongly from neutral expectations in Spanish populations of I. elegans, contrasting the pattern found in eastern European populations, and in I. graellsii, where no such discrepancy between morph divergence and neutral divergence could be detected. This suggests that divergent selection has been operating on the colour locus in Spanish populations of I. elegans, whereas processes such as genetic drift, possibly in combination with other forms of selection (such as negative frequency-dependent selection), appear to have been present in other regions, such as eastern Europe. Overall, the results indicate that both selective and stochastic processes operate on these colour polymorphisms, and suggest that the relative importance of factors varies between geographical regions. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
balancing selection, genetic drift, FST-outlier, damselflies, colour polymorphism, divergent selection
in
Heredity
volume
107
issue
6
pages
513 - 522
publisher
Macmillan
external identifiers
  • wos:000297214900005
  • scopus:81255214938
ISSN
1365-2540
DOI
10.1038/hdy.2011.36
project
Colour genes in dragonflies
BECC
language
English
LU publication?
yes
id
7675883d-0a59-4f3f-87bc-34bcea73d5a2 (old id 1963485)
alternative location
http://www.nature.com/hdy/journal/vaop/ncurrent/full/hdy201136a.html
date added to LUP
2011-05-19 13:42:21
date last changed
2017-11-19 03:10:31
@article{7675883d-0a59-4f3f-87bc-34bcea73d5a2,
  abstract     = {Disentangling the relative importance and potential interactions of selection and genetic drift in driving phenotypic divergence of species is a classical research topic in population genetics and evolutionary biology. Here, we evaluate the role of stochastic and selective forces on population divergence of a colour polymorphism in seven damselfly species of the genus Ischnura, with a particular focus on I. elegans and I. graellsii. Colour-morph frequencies in Spanish I. elegans populations varied greatly, even at a local scale, whereas more similar frequencies were found among populations in eastern Europe. In contrast, I. graellsii and the other five Ischnura species showed little variation in colour-morph frequencies between populations. FST-outlier analyses revealed that the colour locus deviated strongly from neutral expectations in Spanish populations of I. elegans, contrasting the pattern found in eastern European populations, and in I. graellsii, where no such discrepancy between morph divergence and neutral divergence could be detected. This suggests that divergent selection has been operating on the colour locus in Spanish populations of I. elegans, whereas processes such as genetic drift, possibly in combination with other forms of selection (such as negative frequency-dependent selection), appear to have been present in other regions, such as eastern Europe. Overall, the results indicate that both selective and stochastic processes operate on these colour polymorphisms, and suggest that the relative importance of factors varies between geographical regions.},
  author       = {Sanchez Guillen, Rosa and Hansson, Bengt and Wellenreuther, Maren and Svensson, Erik and Cordero-Rivera, A. T},
  issn         = {1365-2540},
  keyword      = {balancing selection,genetic drift,FST-outlier,damselflies,colour polymorphism,divergent selection},
  language     = {eng},
  number       = {6},
  pages        = {513--522},
  publisher    = {Macmillan},
  series       = {Heredity},
  title        = {The influence of stochastic and selective forces in the population divergence of female colour polymorphism in damselflies of the genus Ischnura},
  url          = {http://dx.doi.org/10.1038/hdy.2011.36},
  volume       = {107},
  year         = {2011},
}