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Genetic structure of sigmodontine rodents (Cricetidae) along an altitudinal gradient of the Atlantic Rain Forest in southern Brazil Genet. Mol. Biol.
Gonçalves,Gislene L.; Marinho,Jorge R.; Freitas,Thales R.O..
The population genetic structure of two sympatric species of sigmodontine rodents (Oligoryzomys nigripes and Euryoryzomys russatus) was examined for mitochondrial DNA (mtDNA) sequence haplotypes of the control region. Samples were taken from three localities in the Atlantic Rain Forest in southern Brazil, along an altitudinal gradient with different types of habitat. In both species there was no genetic structure throughout their distribution, although levels of genetic variability and gene flow were high.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Euryoryzomys russatus; Gene flow; Mismatch distribution; Oligoryzomys nigripes; Population expansion.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400034
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Genetic variation and evolutionary demography of Fenneropenaeus chinensis populations, as revealed by the analysis of mitochondrial control region sequences Genet. Mol. Biol.
Kong,Xiao Yu; Li,Yu Long; Shi,Wei; Kong,Jie.
Genetic variation and evolutionary demography of the shrimp Fenneropenaeus chinensis were investigated using sequence data of the complete mitochondrial control region (CR). Fragments of 993 bp of the CR were sequenced for 93 individuals from five localities over most of the species' range in the Yellow Sea and the Bohai Sea. There were 84 variable sites defining 68 haplotypes. Haplotype diversity levels were very high (0.95 ± 0.03-0.99 ± 0.02) in F. chinensis populations, whereas those of nucleotide diversity were moderate to low (0.66 ± 0.36%-0.84 ± 0.46%). Analysis of molecular variance and conventional population statistics (F ST) revealed no significant genetic structure throughout the range of F. chinensis. Mismatch distribution, estimates of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fenneropenaeus chinensis; MtDNA; Isolation with migration (IM) coalescence; Historical demography; Population expansion.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000200029
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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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