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

Details

Serval ID
serval:BIB_5824216B3685
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Phylogeography of a cryptic speciation continuum in Eurasian spadefoot toads (Pelobates).
Journal
Molecular ecology
Author(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
Publication state
Published
Issued date
07/2019
Peer-reviewed
Oui
Volume
28
Number
13
Pages
3257-3270
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
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.
Keywords
Animals, Anura/classification, Bayes Theorem, DNA, Mitochondrial/genetics, Europe, Gene Flow, Genetic Speciation, Genetics, Population, Hybridization, Genetic, Middle East, Phylogeny, Phylogeography, Reproductive Isolation, Sequence Analysis, DNA, Sympatry, amphibia, anuran, hybrid zones, population genomics, reproductive isolation, speciation continuum
Pubmed
Web of science
Create date
18/07/2019 17:44
Last modification date
05/04/2020 6:20
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