Phylogeography of a cryptic speciation continuum in Eurasian spadefoot toads (Pelobates).

Détails

ID Serval
serval:BIB_5824216B3685
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Phylogeography of a cryptic speciation continuum in Eurasian spadefoot toads (Pelobates).
Périodique
Molecular ecology
Auteur(s)
Dufresnes C., Strachinis I., Suriadna N., Mykytynets G., Cogălniceanu D., Székely P., Vukov T., Arntzen J.W., Wielstra B., Lymberakis P., Geffen E., Gafny S., Kumlutaş Y., Ilgaz Ç., Candan K., Mizsei E., Szabolcs M., Kolenda K., Smirnov N., Géniez P., Lukanov S., Crochet P.A., Dubey S., Perrin N., Litvinchuk S.N., Denoël M.
ISSN
1365-294X (Electronic)
ISSN-L
0962-1083
Statut éditorial
Publié
Date de publication
07/2019
Peer-reviewed
Oui
Volume
28
Numéro
13
Pages
3257-3270
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
Cryptic phylogeographic diversifications provide unique models to examine the role of phylogenetic divergence on the evolution of reproductive isolation, without extrinsic factors such as ecological and behavioural differentiation. Yet, to date very few comparative studies have been attempted within such radiations. Here, we characterize a new speciation continuum in a group of widespread Eurasian amphibians, the Pelobates spadefoot toads, by conducting multilocus (restriction site associated DNA sequencing and mitochondrial DNA) phylogenetic, phylogeographic and hybrid zone analyses. Within the P. syriacus complex, we discovered species-level cryptic divergences (>5 million years ago [My]) between populations distributed in the Near-East (hereafter P. syriacus sensu stricto [s.s.]) and southeastern Europe (hereafter P. balcanicus), each featuring deep intraspecific lineages. Altogether, we could scale hybridizability to divergence time along six different stages, spanning from sympatry without gene flow (P. fuscus and P. balcanicus, >10 My), parapatry with highly restricted hybridization (P. balcanicus and P. syriacus s.s., >5 My), narrow hybrid zones (~15 km) consistent with partial reproductive isolation (P. fuscus and P. vespertinus, ~3 My), to extensive admixture between Pleistocene and refugial lineages (≤2 My). This full spectrum empirically supports a gradual build up of reproductive barriers through time, reversible up until a threshold that we estimate at ~3 My. Hence, cryptic phylogeographic lineages may fade away or become reproductively isolated species simply depending on the time they persist in allopatry, and without definite ecomorphological divergence.
Mots-clé
amphibia, anuran, hybrid zones, population genomics, reproductive isolation, speciation continuum
Pubmed
Web of science
Création de la notice
18/07/2019 17:44
Dernière modification de la notice
21/08/2019 6:36
Données d'usage