Analysis of Cytochrome-b Nucleotide Diversity Confirms a Recent Range Expansion in Calomys musculinus (Rodentia, Muridae)

The rodent Calomys musculinus is the reservoir of the Junin virus, which causes Argentine hemorrhagic fever. A phylogeographic approach was used for the analysis of 6 populations from central Argentina based on cytochrome-b sequences from 27 individuals. Thirteen haplotypes were detected, each close...

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Bibliographic Details
Published in:Journal of mammalogy 2007-06, Vol.88 (3), p.777-783
Main Authors: González-Ittig, Raul E., Patton, James L., Gardenal, Cristina N.
Format: Article
Language:English
Subjects:
Aggressiveness
Animal ethology
Argentine hemorrhagic fever
Biological and medical sciences
Calomys musculinus
cytochrome b
DNA
Ecological genetics
Ecology
FEATURE ARTICLES
Fundamental and applied biological sciences. Psychology
Gene flow
Genetic diversity
Haplotypes
History
Infectious diseases
Junin virus
Mammalia
Mammalogy
mismatch distribution
Mitochondrial DNA
Muridae
Nucleotides
Population genetics
Psychology. Psychoanalysis. Psychiatry
recent range expansion
Rodentia
Rodents
Vertebrata
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Summary:The rodent Calomys musculinus is the reservoir of the Junin virus, which causes Argentine hemorrhagic fever. A phylogeographic approach was used for the analysis of 6 populations from central Argentina based on cytochrome-b sequences from 27 individuals. Thirteen haplotypes were detected, each closely linked in the phylogenetic network; 2 of the most frequent haplotypes were internal, whereas the majority were unique to single populations and presented distal positions in the network. Most of the variance was explained by within-population genetic diversity. Results of a mismatch distribution analysis and the deviation from neutrality confirmed that C. musculinus has experienced a recent range expansion; genetic drift has apparently been the main force acting at present, with low to moderate current gene flow. These results are in agreement with previous studies based on polymerase chain reaction–restriction fragment length polymorphism data of the mitochondrial D-loop region, and they support the reliability of both types of techniques.
ISSN:0022-2372
1545-1542
DOI:10.1644/06-MAMM-A-091R1.1