Genomics of extreme ecological specialists: multiple convergent evolution but no genetic divergence between ecotypes of Maculinea alcon butterflies.

Détails

Ressource 1Télécharger: s41598-017-12938-8.pdf (2829.79 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_D431D0966B45
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Genomics of extreme ecological specialists: multiple convergent evolution but no genetic divergence between ecotypes of Maculinea alcon butterflies.
Périodique
Scientific reports
Auteur(s)
Koubínová D., Dincă V., Dapporto L., Vodă R., Suchan T., Vila R., Alvarez N.
ISSN
2045-2322 (Electronic)
ISSN-L
2045-2322
Statut éditorial
Publié
Date de publication
23/10/2017
Peer-reviewed
Oui
Volume
7
Numéro
1
Pages
13752
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Résumé
Biotic interactions are often acknowledged as catalysers of genetic divergence and eventual explanation of processes driving species richness. We address the question, whether extreme ecological specialization is always associated with lineage sorting, by analysing polymorphisms in morphologically similar ecotypes of the myrmecophilous butterfly Maculinea alcon. The ecotypes occur in either hygric or xeric habitats, use different larval host plants and ant species, but no significant distinctive molecular traits have been revealed so far. We apply genome-wide RAD-sequencing to specimens originating from both habitats across Europe in order to get a view of the potential evolutionary processes at work. Our results confirm that genetic variation is mainly structured geographically but not ecologically - specimens from close localities are more related to each other than populations of each ecotype from distant localities. However, we found two loci for which the association with xeric versus hygric habitats is supported by segregating alleles, suggesting convergent evolution of habitat preference. Thus, ecological divergence between the forms probably does not represent an early stage of speciation, but may result from independent recurring adaptations involving few genes. We discuss the implications of these results for conservation and suggest preserving biotic interactions and main genetic clusters.
Mots-clé
Animals, Biological Evolution, Butterflies/genetics, Ecosystem, Ecotype, Genetic Drift, Genetics, Population, Genomics/methods, Gentiana/parasitology, Host-Parasite Interactions, Phenotype, Polymorphism, Single Nucleotide, Population Dynamics
Pubmed
Web of science
Open Access
Oui
Création de la notice
13/11/2017 19:00
Dernière modification de la notice
20/08/2019 16:54
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