A mirage of cryptic species: Genomics uncover striking mitonuclear discordance in the butterfly Thymelicus sylvestris.

Détails

ID Serval
serval:BIB_05855652683B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A mirage of cryptic species: Genomics uncover striking mitonuclear discordance in the butterfly Thymelicus sylvestris.
Périodique
Molecular ecology
Auteur⸱e⸱s
Hinojosa J.C., Koubínová D., Szenteczki M.A., Pitteloud C., Dincă V., Alvarez N., Vila R.
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
09/2019
Peer-reviewed
Oui
Volume
28
Numéro
17
Pages
3857-3868
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Mitochondrial DNA (mtDNA) sequencing has led to an unprecedented rise in the identification of cryptic species. However, it is widely acknowledged that nuclear DNA (nuDNA) sequence data are also necessary to properly define species boundaries. Next generation sequencing techniques provide a wealth of nuclear genomic data, which can be used to ascertain both the evolutionary history and taxonomic status of putative cryptic species. Here, we focus on the intriguing case of the butterfly Thymelicus sylvestris (Lepidoptera: Hesperiidae). We identified six deeply diverged mitochondrial lineages; three distributed all across Europe and found in sympatry, suggesting a potential case of cryptic species. We then sequenced these six lineages using double-digest restriction-site associated DNA sequencing (ddRADseq). Nuclear genomic loci contradicted mtDNA patterns and genotypes generally clustered according to geography, i.e., a pattern expected under the assumption of postglacial recolonization from different refugia. Further analyses indicated that this strong mtDNA/nuDNA discrepancy cannot be explained by incomplete lineage sorting, sex-biased asymmetries, NUMTs, natural selection, introgression or Wolbachia-mediated genetic sweeps. We suggest that this mitonuclear discordance was caused by long periods of geographic isolation followed by range expansions, homogenizing the nuclear but not the mitochondrial genome. These results highlight T. sylvestris as a potential case of multiple despeciation and/or lineage fusion events. We finally argue, since mtDNA and nuDNA do not necessarily follow the same mechanisms of evolution, their respective evolutionary history reflects complementary aspects of past demographic and biogeographic events.
Mots-clé
Animals, Bayes Theorem, Butterflies/genetics, Cell Nucleus/genetics, Electron Transport Complex IV/genetics, Genetic Loci, Genomics, Likelihood Functions, Mitochondria/genetics, Phylogeny, Polymorphism, Single Nucleotide/genetics, Species Specificity, Lepidoptera, RAD sequencing, despeciation, genomics, lineage fusion, mitochondrial DNA
Pubmed
Web of science
Création de la notice
12/01/2024 13:32
Dernière modification de la notice
13/01/2024 8:11
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