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Intralocus sexual conflict over wing length in a wild migratory bird

Tarka, Maja LU ; Åkesson, Mikael; Hasselquist, Dennis LU and Hansson, Bengt LU (2014) In American Naturalist 183(1). p.62-73
Abstract
Intralocus sexual conflict (ISC) occurs when males and

females have different adaptive peaks but are constrained fromevolving

sexual dimorphism because of shared genes. Implications of this

conflict on evolutionary dynamics in wild populations have not been

investigated in detail. In comprehensive analyses of selection, heritability, and genetic correlations, we found evidence for an ISC over wing length, a key trait for flight performance and migration, in a long-term study of wild great reed warblers (Acrocephalus arundinaceus). We found moderate sexual dimorphism, high heritability,

moderate sexually antagonistic selection, and strong positive crosssex

genetic correlation in wing... (More)
Intralocus sexual conflict (ISC) occurs when males and

females have different adaptive peaks but are constrained fromevolving

sexual dimorphism because of shared genes. Implications of this

conflict on evolutionary dynamics in wild populations have not been

investigated in detail. In comprehensive analyses of selection, heritability, and genetic correlations, we found evidence for an ISC over wing length, a key trait for flight performance and migration, in a long-term study of wild great reed warblers (Acrocephalus arundinaceus). We found moderate sexual dimorphism, high heritability,

moderate sexually antagonistic selection, and strong positive crosssex

genetic correlation in wing length, together supporting the presence

of ISC. A negative genetic correlation between male wing length

and female fitness indicated that females inheriting alleles for longer wings from their male relatives also inherited lower fitness.Moreover, cross-sex genetic correlations imposed constraint on the predicted microevolutionary trajectory of wing length (based on selection gradients), especially in females where the predicted response was reversed.

The degree of sexual dimorphism in wing length did not change over time, suggesting no sign of conflict resolution. Our study provides novel insight into how an ISC over a fitness trait can affect microevolution in a wild population under natural selection. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
antagonistic selection, sexual dimorphism, sexual antagonism, evolutionary constraint, pedigree, quantitative genetics, Acrocephalus arundinaceus
in
American Naturalist
volume
183
issue
1
pages
62 - 73
publisher
University of Chicago Press
external identifiers
  • wos:000328241100008
  • pmid:24334736
  • scopus:84890424338
ISSN
0003-0147
DOI
10.1086/674072
project
Wild great reed warblers
CAnMove
BECC
language
English
LU publication?
yes
id
2c2233c3-a97e-4f94-a01c-72f54e9d424a (old id 4147136)
date added to LUP
2013-12-02 12:26:22
date last changed
2017-10-22 03:00:24
@article{2c2233c3-a97e-4f94-a01c-72f54e9d424a,
  abstract     = {Intralocus sexual conflict (ISC) occurs when males and<br/><br>
females have different adaptive peaks but are constrained fromevolving<br/><br>
sexual dimorphism because of shared genes. Implications of this<br/><br>
conflict on evolutionary dynamics in wild populations have not been<br/><br>
investigated in detail. In comprehensive analyses of selection, heritability, and genetic correlations, we found evidence for an ISC over wing length, a key trait for flight performance and migration, in a long-term study of wild great reed warblers (Acrocephalus arundinaceus). We found moderate sexual dimorphism, high heritability,<br/><br>
moderate sexually antagonistic selection, and strong positive crosssex<br/><br>
genetic correlation in wing length, together supporting the presence<br/><br>
of ISC. A negative genetic correlation between male wing length<br/><br>
and female fitness indicated that females inheriting alleles for longer wings from their male relatives also inherited lower fitness.Moreover, cross-sex genetic correlations imposed constraint on the predicted microevolutionary trajectory of wing length (based on selection gradients), especially in females where the predicted response was reversed.<br/><br>
The degree of sexual dimorphism in wing length did not change over time, suggesting no sign of conflict resolution. Our study provides novel insight into how an ISC over a fitness trait can affect microevolution in a wild population under natural selection.},
  author       = {Tarka, Maja and Åkesson, Mikael and Hasselquist, Dennis and Hansson, Bengt},
  issn         = {0003-0147},
  keyword      = {antagonistic selection,sexual dimorphism,sexual antagonism,evolutionary constraint,pedigree,quantitative genetics,Acrocephalus arundinaceus},
  language     = {eng},
  number       = {1},
  pages        = {62--73},
  publisher    = {University of Chicago Press},
  series       = {American Naturalist},
  title        = {Intralocus sexual conflict over wing length in a wild migratory bird},
  url          = {http://dx.doi.org/10.1086/674072},
  volume       = {183},
  year         = {2014},
}