Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae).

Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae). Research Abstract Details 

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Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae). Abstract Text:

Massimo Giovannotti,Paola Nisi Cerioni,Mohsen Kalboussi,Gennaro Aprea,Vincenzo Caputo,Massimo Giovannotti,Paola Nisi Cerioni,Mohsen Kalboussi,Gennaro Aprea,Vincenzo Caputo,

Genetic diversity was analyzed in Chalcides chalcides populations from peninsular Italy, Sardinia, Sicily and Tunisia by sequencing 400 bp at the 5' end of the mitochondrial gene encoding cytochrome b (cyt b) and by restriction fragment length polymorphism (RFLP) analysis of two mitochondrial DNA segments (ND-1/2 and ND-3/4). The results of the phylogenetic analysis highlighted the presence of three main clades corresponding with three of the four main geographical areas (Tunisia, Sicily and the Italian peninsula), while Sardinia proved to be closely related to Tunisian haplotypes suggesting a colonization of this island from North Africa by human agency in historical times. On the contrary, the splitting times estimated on the basis of cyt b sequence data seem to indicate a more ancient colonization of Sicily and the Italian Peninsula, as a consequence of tectonic and climatic events that affected the Mediterranean Basin during the Pleistocene. Finally, the analysis of the genetic variability of C. chalcides populations showed a remarkable genetic homogeneity in Italian populations when compared to the Tunisian ones. This condition could be explained by a rapid post-glacial expansion from refugial populations that implied serial bottlenecking with progressive loss of haplotypes, resulting in a low genetic diversity in the populations inhabiting the more recently colonized areas.

Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae). Publishing Authors By Initials

M Giovannotti,PN Cerioni,M Kalboussi,G Aprea,V Caputo,M Giovannotti,PN Cerioni,M Kalboussi,G Aprea,V Caputo,

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Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae). Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of experimental zoology. Part B. Molecular

VOLUME: 308

Page Numbers: 297-307

Journal Abbreviation: J. Exp. Zool. B Mol. Dev. Evol

ISSN: 1552-5007

DAY: 15

MONTH: May

YEAR: 2007

Phylogeographic inferences from the mtDNA variation of the three-toed skink, Chalcides chalcides (Reptilia: Scincidae). Information

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LANGUAGE: eng

NlmUniqueID: 101168228

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AFFILIATION: Istituto di Biologia e Genetica, Università Politecnica delle Marche, I-60100 Ancona, Italy.

Country: United States

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MEDLINETA: J Exp Zoolog B Mol Dev Evol

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