Advanced

Evolution and stability of the G-matrix during the colonization of a novel environment.

Eroukhmanoff, Fabrice LU and Svensson, Erik LU (2011) In Journal of Evolutionary Biology 24(6). p.1363-1373
Abstract
Populations that undergo a process of rapid evolution present excellent opportunities to investigate the mechanisms driving or restraining adaptive divergence. The genetic variance-covariance matrix (G) is often considered to constrain adaptation but little is known about its potential to evolve during phenotypic divergence. We compared the G-matrices of ancestral and recently established ecotype populations of an aquatic isopod (Asellus aquaticus) that have diverged in parallel in two south Swedish lakes. Phenotypic changes after colonization involved a reduction in overall size, lost pigmentation and changes in shape. Comparisons between G-matrices reveal close similarity within the same ecotype from different lakes but some degree of... (More)
Populations that undergo a process of rapid evolution present excellent opportunities to investigate the mechanisms driving or restraining adaptive divergence. The genetic variance-covariance matrix (G) is often considered to constrain adaptation but little is known about its potential to evolve during phenotypic divergence. We compared the G-matrices of ancestral and recently established ecotype populations of an aquatic isopod (Asellus aquaticus) that have diverged in parallel in two south Swedish lakes. Phenotypic changes after colonization involved a reduction in overall size, lost pigmentation and changes in shape. Comparisons between G-matrices reveal close similarity within the same ecotype from different lakes but some degree of differentiation among ecotypes. Phenotypic divergence has apparently not been much influenced by the orientation of G. Additive genetic variation in the newly colonized habitats has also decreased substantially. This suggests that a process of adaptation from standing genetic variation has occurred and has probably facilitated phenotypic divergence. (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
adaptation, ecotype, G-matrix, parallel evolution, rapid divergence.
in
Journal of Evolutionary Biology
volume
24
issue
6
pages
1363 - 1373
publisher
John Wiley & Sons
external identifiers
  • wos:000290313500020
  • scopus:79955659476
ISSN
1420-9101
DOI
10.1111/j.1420-9101.2011.02270.x
project
BECC
language
English
LU publication?
yes
id
8b88f694-bb30-451f-88e7-749158b0c1a0 (old id 1936881)
date added to LUP
2011-05-16 13:33:36
date last changed
2017-09-10 03:19:17
@article{8b88f694-bb30-451f-88e7-749158b0c1a0,
  abstract     = {Populations that undergo a process of rapid evolution present excellent opportunities to investigate the mechanisms driving or restraining adaptive divergence. The genetic variance-covariance matrix (G) is often considered to constrain adaptation but little is known about its potential to evolve during phenotypic divergence. We compared the G-matrices of ancestral and recently established ecotype populations of an aquatic isopod (Asellus aquaticus) that have diverged in parallel in two south Swedish lakes. Phenotypic changes after colonization involved a reduction in overall size, lost pigmentation and changes in shape. Comparisons between G-matrices reveal close similarity within the same ecotype from different lakes but some degree of differentiation among ecotypes. Phenotypic divergence has apparently not been much influenced by the orientation of G. Additive genetic variation in the newly colonized habitats has also decreased substantially. This suggests that a process of adaptation from standing genetic variation has occurred and has probably facilitated phenotypic divergence.},
  author       = {Eroukhmanoff, Fabrice and Svensson, Erik},
  issn         = {1420-9101},
  keyword      = {adaptation,ecotype,G-matrix,parallel evolution,rapid divergence.},
  language     = {eng},
  number       = {6},
  pages        = {1363--1373},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Evolution and stability of the G-matrix during the colonization of a novel environment.},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2011.02270.x},
  volume       = {24},
  year         = {2011},
}