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	Provedor de dados Genet. Mol. Biol. (2) Zoologia (1) Autor Almeida,Francisca C. (3) Bonvicino,Cibele R. (2) Cerqueira,Rui (2) Moreira,Miguel A.M. (2) Lima,José F. S. (1) Maroja,Luana S. (1) Seuánez,Héctor N. (1) Mais... Palavra-chave Brazilian Cerrado (1) Calomys (1) Divergence time (1) Islands (1) Karyotype (1) Microsatellites (1) Morphology (1) New species (1) Population expansion (1) Population genetics (1) Population size (1) Mais... Tipo do documento Info:eu-repo/semantics/article (3) Ano 2005 (1) 2003 (1) 2000 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última 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 RAPD analysis of Nectomys squamipes (Rodentia, Sigmodontinae) populations Genet. Mol. Biol. Almeida,Francisca C.; Moreira,Miguel A.M.; Bonvicino,Cibele R.; Cerqueira,Rui. Random amplified of polymorphic DNA (RAPD) analysis was used to assess genetic distance and the genetic structure of populations of Nectomys squamipes, a semiaquatic rodent species distributed along watercourses. DNA samples of five populations were analyzed using three primers, producing 45 scorable bands, 31 of which were polymorphic. There was a significant differentiation among populations [F ST = 0.17; phiST = 0.14 (P < 0.004)] but gene flow (Nm = 1.25) was sufficient to overcome genetic drift effects. No fixed specific markers were found for any population. The Mantel's test and UPGMA cluster analysis showed a lack of relationship between genetic and geographic distances. The apparent homogeneity indicated by RAPD markers coincided with... Tipo: Info:eu-repo/semantics/article Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000400014 A new species of Calomys Waterhouse (Rodentia, Sigmodontinae)from the Cerrado of Central Brazil Zoologia Bonvicino,Cibele R.; Lima,José F. S.; Almeida,Francisca C.. A new Brazilian Calomys Waterhouse, 1837 species is described based on morphologic and karyologic data. This species is endemic to the Cerrado of Central Brazil and allopatric with all other species of the genus Calomys. Its chromosome complement (2n = 46, AN = 66) is different from those described in other Calomys species. Morphometric analysis significantly distinguished this new species from other Calomys of the Brazilian fauna like C. callosus (Renger, 1830), C. expulsus (Lund, 1841) and C. tener (Winge, 1887) and placed it among the large-sized Calomys. Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian Cerrado; Calomys; Karyotype; Morphology; New species. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200021 Registros recuperados: 3 Primeira ... 1 ... Última

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