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Population structure and genetic variability of mainland and insular populations of the Neotropical water rat, Nectomys squamipes (Rodentia, Sigmodontinae) Genet. Mol. Biol.
Almeida,Francisca C.; Maroja,Luana S.; Moreira,Miguel A.M.; Seuánez,Héctor N.; Cerqueira,Rui.
Seven microsatellite loci were used to investigate the genetic variability and structure of six mainland and two island populations of the Neotropical water rat Nectomys squamipes, a South American semi-aquatic rodent species with a wide distribution. High levels of variability were found within mainland populations while island populations were less variable but the more differentiated in respect to allele number and frequency. The time of biological divergence between mainland and island populations coincided with geological data. A significant geographic structure was found in mainland populations (theta = 0.099; rho = 0.086) although the degree of differentiation was relatively low in respect to the distance between surveyed localities (24 to 740 km)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microsatellites; Population genetics; Islands; Population expansion; Population size; Divergence time.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500008
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