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A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird

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A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird. / Bourgeois, Yann X. C.; Delahaie, Boris; Gautier, Mathieu; Lhuillier, Emeline; Malé, Pierre-Jean G.; Bertrand, Joris A. M.; Cornuault, Josselin; Wakamatsu, Kazumasa; Bouchez, Olivier; Mould, Claire; Bruxaux, Jade; Holota, Hélène; Milá, Borja; Thébaud, Christophe.

In: Royal Society Open Science, Vol. 4, No. 2, 160805, 01.02.2017.

Research output: Contribution to journalArticlepeer-review

Harvard

Bourgeois, YXC, Delahaie, B, Gautier, M, Lhuillier, E, Malé, P-JG, Bertrand, JAM, Cornuault, J, Wakamatsu, K, Bouchez, O, Mould, C, Bruxaux, J, Holota, H, Milá, B & Thébaud, C 2017, 'A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird', Royal Society Open Science, vol. 4, no. 2, 160805. https://doi.org/10.1098/rsos.160805

APA

Bourgeois, Y. X. C., Delahaie, B., Gautier, M., Lhuillier, E., Malé, P-J. G., Bertrand, J. A. M., Cornuault, J., Wakamatsu, K., Bouchez, O., Mould, C., Bruxaux, J., Holota, H., Milá, B., & Thébaud, C. (2017). A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird. Royal Society Open Science, 4(2), [160805]. https://doi.org/10.1098/rsos.160805

Vancouver

Bourgeois YXC, Delahaie B, Gautier M, Lhuillier E, Malé P-JG, Bertrand JAM et al. A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird. Royal Society Open Science. 2017 Feb 1;4(2). 160805. https://doi.org/10.1098/rsos.160805

Author

Bourgeois, Yann X. C. ; Delahaie, Boris ; Gautier, Mathieu ; Lhuillier, Emeline ; Malé, Pierre-Jean G. ; Bertrand, Joris A. M. ; Cornuault, Josselin ; Wakamatsu, Kazumasa ; Bouchez, Olivier ; Mould, Claire ; Bruxaux, Jade ; Holota, Hélène ; Milá, Borja ; Thébaud, Christophe. / A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird. In: Royal Society Open Science. 2017 ; Vol. 4, No. 2.

Bibtex

@article{a4b3331c54be493fb5c219d776a2d9c5,
title = "A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird",
abstract = "Understanding the mechanisms responsible for phenotypic diversification within and among species ultimately rests with linking naturally occurring mutations to functionally and ecologically significant traits. Colour polymorphisms are of great interest in this context because discrete colour patterns within a population are often controlled by just a few genes in a common environment. We investigated how and why phenotypic diversity arose and persists in the Zosterops borbonicus white-eye of Reunion (Mascarene archipelago), a colour polymorphic songbird in which all highland populations contain individuals belonging to either a brown or a grey plumage morph. Using extensive phenotypic and genomic data, we demonstrate that this melanin-based colour polymorphism is controlled by a single locus on chromosome 1 with two large-effect alleles, which was not previously described as affecting hair or feather colour. Differences between colour morphs appear to rely upon complex cis-regulatory variation that either prevents the synthesis of pheomelanin in grey feathers, or increases its production in brown ones. We used coalescent analyses to show that, from a {\textquoteleft}brown{\textquoteright} ancestral population, the dominant {\textquoteleft}grey{\textquoteright} allele spread quickly once it arose from a new mutation. Since colour morphs are always found in mixture, this implies that the selected allele does not go to fixation, but instead reaches an intermediate frequency, as would be expected under balancing selection.",
keywords = "ecology, evolution, genomics",
author = "Bourgeois, {Yann X. C.} and Boris Delahaie and Mathieu Gautier and Emeline Lhuillier and Mal{\'e}, {Pierre-Jean G.} and Bertrand, {Joris A. M.} and Josselin Cornuault and Kazumasa Wakamatsu and Olivier Bouchez and Claire Mould and Jade Bruxaux and H{\'e}l{\`e}ne Holota and Borja Mil{\'a} and Christophe Th{\'e}baud",
year = "2017",
month = feb,
day = "1",
doi = "10.1098/rsos.160805",
language = "English",
volume = "4",
journal = "Royal Society Open Science",
issn = "2054-5703",
publisher = "The Royal Society",
number = "2",

}

RIS

TY - JOUR

T1 - A novel locus on chromosome 1 underlies the evolution of a melanic plumage polymorphism in a wild songbird

AU - Bourgeois, Yann X. C.

AU - Delahaie, Boris

AU - Gautier, Mathieu

AU - Lhuillier, Emeline

AU - Malé, Pierre-Jean G.

AU - Bertrand, Joris A. M.

AU - Cornuault, Josselin

AU - Wakamatsu, Kazumasa

AU - Bouchez, Olivier

AU - Mould, Claire

AU - Bruxaux, Jade

AU - Holota, Hélène

AU - Milá, Borja

AU - Thébaud, Christophe

PY - 2017/2/1

Y1 - 2017/2/1

N2 - Understanding the mechanisms responsible for phenotypic diversification within and among species ultimately rests with linking naturally occurring mutations to functionally and ecologically significant traits. Colour polymorphisms are of great interest in this context because discrete colour patterns within a population are often controlled by just a few genes in a common environment. We investigated how and why phenotypic diversity arose and persists in the Zosterops borbonicus white-eye of Reunion (Mascarene archipelago), a colour polymorphic songbird in which all highland populations contain individuals belonging to either a brown or a grey plumage morph. Using extensive phenotypic and genomic data, we demonstrate that this melanin-based colour polymorphism is controlled by a single locus on chromosome 1 with two large-effect alleles, which was not previously described as affecting hair or feather colour. Differences between colour morphs appear to rely upon complex cis-regulatory variation that either prevents the synthesis of pheomelanin in grey feathers, or increases its production in brown ones. We used coalescent analyses to show that, from a ‘brown’ ancestral population, the dominant ‘grey’ allele spread quickly once it arose from a new mutation. Since colour morphs are always found in mixture, this implies that the selected allele does not go to fixation, but instead reaches an intermediate frequency, as would be expected under balancing selection.

AB - Understanding the mechanisms responsible for phenotypic diversification within and among species ultimately rests with linking naturally occurring mutations to functionally and ecologically significant traits. Colour polymorphisms are of great interest in this context because discrete colour patterns within a population are often controlled by just a few genes in a common environment. We investigated how and why phenotypic diversity arose and persists in the Zosterops borbonicus white-eye of Reunion (Mascarene archipelago), a colour polymorphic songbird in which all highland populations contain individuals belonging to either a brown or a grey plumage morph. Using extensive phenotypic and genomic data, we demonstrate that this melanin-based colour polymorphism is controlled by a single locus on chromosome 1 with two large-effect alleles, which was not previously described as affecting hair or feather colour. Differences between colour morphs appear to rely upon complex cis-regulatory variation that either prevents the synthesis of pheomelanin in grey feathers, or increases its production in brown ones. We used coalescent analyses to show that, from a ‘brown’ ancestral population, the dominant ‘grey’ allele spread quickly once it arose from a new mutation. Since colour morphs are always found in mixture, this implies that the selected allele does not go to fixation, but instead reaches an intermediate frequency, as would be expected under balancing selection.

KW - ecology

KW - evolution

KW - genomics

U2 - 10.1098/rsos.160805

DO - 10.1098/rsos.160805

M3 - Article

VL - 4

JO - Royal Society Open Science

JF - Royal Society Open Science

SN - 2054-5703

IS - 2

M1 - 160805

ER -

ID: 18839211