Genetic relationships of the western Mediterranean painted frogs based on allozymes and mitochondrial markers: evolutionary and taxonomic inferences (Amphibia, Anura, Discoglossidae)

Allozymes and sequencing of mitochondrial cytochrome b (cyt b) and 12S genes were used to reconstruct the genetic structure and phylogenetic relationships of all Discoglossus taxa described so far (except the probably extinct D. nigriventer). This is the first time that a comprehensive study on the...

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Bibliographic Details
Published in:Biological journal of the Linnean Society 2006-04, Vol.87 (4), p.515-536
Main Authors: FRANCESCA, ZANGARI, ROBERTA, CIMMARUTA, GIUSEPPE, NASCETTI
Format: Article
Language:English
Subjects:
Amphibia
Amphibia. Reptilia
ancestral polymorphism sorting
Anura
Biological and medical sciences
Biological evolution
Discoglossidae
Discoglossus
Fundamental and applied biological sciences. Psychology
genetic structure
Genetics of eukaryotes. Biological and molecular evolution
molecular phylogeny
mtDNA sequencing
palaeogeography
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
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Summary:Allozymes and sequencing of mitochondrial cytochrome b (cyt b) and 12S genes were used to reconstruct the genetic structure and phylogenetic relationships of all Discoglossus taxa described so far (except the probably extinct D. nigriventer). This is the first time that a comprehensive study on the Discoglossus painted frogs has used nuclear and mitochondrial markers, evidencing a discordant pattern between the two datasets. Comparison of these discrepancies suggests a role of stochastic sorting of ancestral polymorphisms, possibly associated with male‐biased dispersal and present or past secondary contact. The genetic relationships between taxa with intermediate levels of divergence were well defined by allozyme data, but showed short internodes and low bootstrap values for mitochondrial data, suggesting a rapid radiation of their lineages during the Messinian Lago Mare phase. The results provide information about the taxonomic status of D. galganoi and D. jeanneae, considered as subspecies, and indicate D. pictus as nonmonophyletic, confirming D. scovazzi as a distinct species. © 2006 The Linnean Society of London, Biological Journal of the Linnean Society, 2006, 87, 515–536.
ISSN:0024-4066
1095-8312
DOI:10.1111/j.1095-8312.2006.00585.x