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Nine karyomorphs for spiny rats of the genus Proechimys (Echimyidae, Rodentia) from North and Central Brazil Genet. Mol. Biol.
Machado,Taís; Silva,Maria José de J.; Leal-Mesquita,Emygdia Rosa; Carmignotto,Ana Paula; Yonenaga-Yassuda,Yatiyo.
Spiny rats of the genus Proechimys are morphologically diverse, widely distributed and have diploid numbers ranging from 2n = 14-16 to 2n = 62. In this paper we present cytogenetical data and brief comments on morphological and biogeographical issues related to spiny rats. In our sample of 42 spiny rats collected from 12 Brazilian Amazonian tropical rainforest and the Cerrado (Brazilian savanna) sites we detected nine karyological entities: four different karyomorphs with 2n = 30, three with 2n = 28, one with 2n = 15 and one with 2n = 44. Based on qualitative morphological characters these karyomorphs can be allocated to five species within the goeldii, guyannensis and longicaudatus species groups.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Proechimys; Rodents; Cytogenetics; Karyomorph; Morphology.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500007
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Genetic characterization of the population of São Luís, MA, Brazil Genet. Mol. Biol.
Ferreira,Francileide Lisboa; Leal-Mesquita,Emygdia Rosa; Santos,Sidney Emanuel Batista dos; Ribeiro-dos-Santos,Ândrea Kely Campos.
Five loci (vWA1, F13A1, D12S67, Apo-B and D1S80) were investigated by polyacrylamide gel electrophoresis followed by silver staining in a sample of 177 individuals from the population of São Luís, State of Maranhão, Brazil. A total of 70 different alleles were identified. A statistically significant deviation from the Hardy-Weinberg equilibrium was observed in a single locus (F13A1, p = 0.0075). The average heterozygosity (H) was estimated at 77.7%, the mean number of alleles per locus as 14. The PD (capacity of genotype differentiation at each locus) ranged from 88.9% (vWA1) to 96.7% (F13A1). The combined PE (power of exclusion) of these five loci was 99.8%. In terms of racial admixture (42% European, 39% Indian, and 19% African Black ancestry), São Luís...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon region; DNA; Polymorphisms; VNTRs; STRs; Interethnic admixture.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000100004
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