Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour
Abstract The A rctic skua ( S tercorarius parasiticus ) is a classic example of an avian plumage polymorphism, with variation in melanin‐based ventral plumage coloration defining pale, intermediate and dark morphs in adults of both sexes. However, despite several decades of field research, there is...
Published in: | Molecular Ecology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2013
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/mec.12428 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12428 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12428 |
id |
crwiley:10.1111/mec.12428 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/mec.12428 2023-12-03T10:17:35+01:00 Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour Janssen, Kirstin Mundy, Nicholas I. 2013 http://dx.doi.org/10.1111/mec.12428 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12428 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12428 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 Molecular Ecology volume 22, issue 18, page 4634-4643 ISSN 0962-1083 1365-294X Genetics Ecology, Evolution, Behavior and Systematics journal-article 2013 crwiley https://doi.org/10.1111/mec.12428 2023-11-09T14:28:21Z Abstract The A rctic skua ( S tercorarius parasiticus ) is a classic example of an avian plumage polymorphism, with variation in melanin‐based ventral plumage coloration defining pale, intermediate and dark morphs in adults of both sexes. However, despite several decades of field research, there is an incomplete understanding of how the polymorphism in ventral plumage colour is maintained and the selective forces involved. Here, we investigate selection on a locus ( MC 1 R ) that is strongly associated with plumage colour variation in Arctic skuas using patterns of nucleotide variation and comparison to neutral loci (nuclear introns and mt DNA ). We find that three linked nonsynonymous mutations in MC 1 R , including the single mutation described previously, are associated with plumage colour in the A rctic skua. The position of nonsynonymous mutations on a MC 1 R haplotype network implies that divergent selection drove the initial evolution of the colour morphs. Comparisons of F ST s of MC 1 R vs. nuclear introns among five skua populations differing in proportion of dark morphs along an approximate north–south cline reveal a signature of divergent selection on MC 1 R . In contrast, we find limited evidence for balancing selection on MC 1 R within populations, although the power is low. Our results provide strong evidence for both past and ongoing selection on MC 1 R , and, by implication, plumage colour in A rctic skuas. The results suggest that a fruitful avenue for future ecological studies will be analysis of selection on morphs in colonies at the extremes along the morph ratio cline. Article in Journal/Newspaper Arctic Stercorarius parasiticus Wiley Online Library (via Crossref) Arctic Molecular Ecology 22 18 4634 4643 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Genetics Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Genetics Ecology, Evolution, Behavior and Systematics Janssen, Kirstin Mundy, Nicholas I. Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
topic_facet |
Genetics Ecology, Evolution, Behavior and Systematics |
description |
Abstract The A rctic skua ( S tercorarius parasiticus ) is a classic example of an avian plumage polymorphism, with variation in melanin‐based ventral plumage coloration defining pale, intermediate and dark morphs in adults of both sexes. However, despite several decades of field research, there is an incomplete understanding of how the polymorphism in ventral plumage colour is maintained and the selective forces involved. Here, we investigate selection on a locus ( MC 1 R ) that is strongly associated with plumage colour variation in Arctic skuas using patterns of nucleotide variation and comparison to neutral loci (nuclear introns and mt DNA ). We find that three linked nonsynonymous mutations in MC 1 R , including the single mutation described previously, are associated with plumage colour in the A rctic skua. The position of nonsynonymous mutations on a MC 1 R haplotype network implies that divergent selection drove the initial evolution of the colour morphs. Comparisons of F ST s of MC 1 R vs. nuclear introns among five skua populations differing in proportion of dark morphs along an approximate north–south cline reveal a signature of divergent selection on MC 1 R . In contrast, we find limited evidence for balancing selection on MC 1 R within populations, although the power is low. Our results provide strong evidence for both past and ongoing selection on MC 1 R , and, by implication, plumage colour in A rctic skuas. The results suggest that a fruitful avenue for future ecological studies will be analysis of selection on morphs in colonies at the extremes along the morph ratio cline. |
format |
Article in Journal/Newspaper |
author |
Janssen, Kirstin Mundy, Nicholas I. |
author_facet |
Janssen, Kirstin Mundy, Nicholas I. |
author_sort |
Janssen, Kirstin |
title |
Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
title_short |
Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
title_full |
Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
title_fullStr |
Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
title_full_unstemmed |
Molecular population genetics of the melanic plumage polymorphism in Arctic skuas ( Stercorarius parasiticus ): evidence for divergent selection on plumage colour |
title_sort |
molecular population genetics of the melanic plumage polymorphism in arctic skuas ( stercorarius parasiticus ): evidence for divergent selection on plumage colour |
publisher |
Wiley |
publishDate |
2013 |
url |
http://dx.doi.org/10.1111/mec.12428 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fmec.12428 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mec.12428 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Stercorarius parasiticus |
genre_facet |
Arctic Stercorarius parasiticus |
op_source |
Molecular Ecology volume 22, issue 18, page 4634-4643 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor http://doi.wiley.com/10.1002/tdm_license_1.1 |
op_doi |
https://doi.org/10.1111/mec.12428 |
container_title |
Molecular Ecology |
container_volume |
22 |
container_issue |
18 |
container_start_page |
4634 |
op_container_end_page |
4643 |
_version_ |
1784264527560310784 |