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Molecular population divergence and sexual selection on morphology in the banded demoiselle (Calopteryx splendens)

Svensson, Erik LU ; Kristoffersen, Lina LU ; Oskarsson, K. and Bensch, Staffan LU (2004) In Heredity 93(5). p.423-433
Abstract
The importance of sexual selection in population divergence is of much interest, mainly because it is thought to cause reproductive isolation and hence could lead to speciation. Sexually selected traits have been hypothesized to diverge faster between populations than other traits, presumably because of differences in the strength, mechanism or dynamics of selection. We investigated this by quantifying population divergence in eight morphological characters in 12 south Swedish populations of a sexually dimorphic damselfly, the banded demoiselle (Calopteryx splendens). The morphological characters included a secondary sexual character, the male melanized wing spot, which has an important function in both inter- and intrasexual selection. In... (More)
The importance of sexual selection in population divergence is of much interest, mainly because it is thought to cause reproductive isolation and hence could lead to speciation. Sexually selected traits have been hypothesized to diverge faster between populations than other traits, presumably because of differences in the strength, mechanism or dynamics of selection. We investigated this by quantifying population divergence in eight morphological characters in 12 south Swedish populations of a sexually dimorphic damselfly, the banded demoiselle (Calopteryx splendens). The morphological characters included a secondary sexual character, the male melanized wing spot, which has an important function in both inter- and intrasexual selection. In addition, we investigated molecular population divergence, revealed by amplified fragment length polymorphism (AFLP) analysis. Molecular population divergence was highly significant among these Northern European populations ( overall Fst = 0.054; pairwise population Fst's ranged from apprx0 to 0.13). We found evidence for isolation-by-distance (r = 0.70) for the molecular markers and a significant correlation between molecular and phenotypic population divergence (r = 0.39). One interpretation is that population divergence for the AFLP loci are affected by genetic drift, but is also indirectly influenced by selection, due to linkage with loci for the phenotypic traits. Field estimates of sexual and natural selection from two of the populations revealed fairly strong sexual selection on wing spot length, indicating that this trait has the potential to rapidly diverge, provided that variation is heritable and the observed selection is chronic. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Heredity
volume
93
issue
5
pages
423 - 433
publisher
Macmillan
external identifiers
  • wos:000224693300005
  • pmid:15254490
  • scopus:7044223210
ISSN
1365-2540
DOI
10.1038/sj.hdy.6800519
language
English
LU publication?
yes
id
ae3ff711-6c78-44b0-be5a-59da0bb1430f (old id 139716)
date added to LUP
2007-06-25 14:00:18
date last changed
2017-11-12 03:26:57
@article{ae3ff711-6c78-44b0-be5a-59da0bb1430f,
  abstract     = {The importance of sexual selection in population divergence is of much interest, mainly because it is thought to cause reproductive isolation and hence could lead to speciation. Sexually selected traits have been hypothesized to diverge faster between populations than other traits, presumably because of differences in the strength, mechanism or dynamics of selection. We investigated this by quantifying population divergence in eight morphological characters in 12 south Swedish populations of a sexually dimorphic damselfly, the banded demoiselle (Calopteryx splendens). The morphological characters included a secondary sexual character, the male melanized wing spot, which has an important function in both inter- and intrasexual selection. In addition, we investigated molecular population divergence, revealed by amplified fragment length polymorphism (AFLP) analysis. Molecular population divergence was highly significant among these Northern European populations ( overall Fst = 0.054; pairwise population Fst's ranged from apprx0 to 0.13). We found evidence for isolation-by-distance (r = 0.70) for the molecular markers and a significant correlation between molecular and phenotypic population divergence (r = 0.39). One interpretation is that population divergence for the AFLP loci are affected by genetic drift, but is also indirectly influenced by selection, due to linkage with loci for the phenotypic traits. Field estimates of sexual and natural selection from two of the populations revealed fairly strong sexual selection on wing spot length, indicating that this trait has the potential to rapidly diverge, provided that variation is heritable and the observed selection is chronic.},
  author       = {Svensson, Erik and Kristoffersen, Lina and Oskarsson, K. and Bensch, Staffan},
  issn         = {1365-2540},
  language     = {eng},
  number       = {5},
  pages        = {423--433},
  publisher    = {Macmillan},
  series       = {Heredity},
  title        = {Molecular population divergence and sexual selection on morphology in the banded demoiselle (Calopteryx splendens)},
  url          = {http://dx.doi.org/10.1038/sj.hdy.6800519},
  volume       = {93},
  year         = {2004},
}