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Colonization Process of the Brazilian Common Vesper Mouse, Calomys expulsus (Cricetidae, Sigmodontinae): A Biogeographic Hypothesis.

Authors :
NASCIMENTO, FABRÍCIA FERREIRA DO
PEREIRA, LUCIANA G.
GEISE, LENA
BEZERRA, ALEXANDRA M. R.
D'ANDREA, PAULO S.
BONVICINO, CIBELE R.
Source :
Journal of Heredity; May2011, Vol. 102 Issue 3, p260-268, 9p, 1 Diagram, 1 Chart, 2 Graphs, 1 Map
Publication Year :
2011

Abstract

Riverine barriers have been associated to genetic diversification and speciation of several taxa. The Rio São Francisco is one of the largest rivers in South America, representing the third largest river basin in Brazil and operating as a geographic barrier to gene flow of different taxa. To evaluate the influence of the Rio São Francisco in the speciation of small rodents, we investigated the genetic structure of Calomys expulsus with phylogenetic and network analyses of cytochrome b DNA. Our results suggested that C. expulsus can be divided into 3 subpopulations, 2 on the left and another one on the right bank of this river. The time of divergence of these subpopulations, using a Bayesian framework, suggested colonization from the south to the north/northeast. Spatial analysis using a clustering method and the Monmonier's algorithm suggested that the Rio São Francisco is a biogeographic barrier to gene flow and indicated that this river may play a role in the incipient speciation process of these subpopulations. [ABSTRACT FROM PUBLISHER]

Subjects

Subjects :
CALOMYS
MURIDAE
CYTOCHROME b
RODENTS

Details

Language :
English
ISSN :
00221503
Volume :
102
Issue :
3
Database :
Complementary Index
Journal :
Journal of Heredity
Publication Type :
Academic Journal
Accession number :
60161066
Full Text :
https://doi.org/10.1093/jhered/esr012