African Mtdna
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Molecular analyses reveal the occurrence of three new sympatric lineages of velvet worms (Onychophora: Peripatidae) in the eastern Amazon basin
Abstract In the present study, we investigated the possible existence of new lineages of peripatids through comparisons between known Neotropical species and specimens obtained from two locations in Pará, a state in eastern Brazilian Amazonia using a molecular approach based on sequences of the mtDNA genes COI, 16Sr RNA, and 18S RNA. The analyses included a
Genet. Mol. Biol.. Publicado em: 02/03/2017
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2. Mitochondrial and Y chromosome genetic diversity in the Portuguese Lidia bovine breed
ABSTRACT A total of 80 samples were collected to analyze the mitochondrial DNA (mtDNA) and Y chromosome genetic diversity of two main Portuguese Lidia bovine populations and clarify their genetic relationships with Spanish Lidia lineages. A 521-bp D-loop fragment was sequenced in 40 animals belonging to four herds (three Brava dos Açores and one Casta Portu
R. Bras. Zootec.. Publicado em: 2017-02
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3. Uniparental ancestry markers in Chilean populations
Abstract The presence of Native Americans, Europeans, and Africans has led to the development of a multi-ethnic, admixed population in Chile. This study aimed to contribute to the characterization of the uniparental genetic structure of three Chilean regions. Newborns from seven hospitals in Independencia, Providencia, Santiago, Curicó, Cauquenes, Valdívia
Genet. Mol. Biol.. Publicado em: 04/08/2016
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4. High interpopulation homogeneity in Central Argentina as assessed by Ancestry Informative Markers (AIMs)
The population of Argentina has already been studied with regard to several genetic markers, but much more data are needed for the appropriate definition of its genetic profile. This study aimed at investigating the admixture patterns and genetic structure in Central Argentina, using biparental markers and comparing the results with those previously obtained
Genet. Mol. Biol.. Publicado em: 2015-09
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5. Reconstruction of major maternal and paternal lineages of the Cape Muslim population
The earliest Cape Muslims were brought to the Cape (Cape Town -South Africa) from Africa and Asia from 1652 to 1834. They were part of an involuntary migration of slaves, political prisoners and convicts, and they contributed to the ethnic diversity of the present Cape Muslim population of South Africa. The history of the Cape Muslims has been well documente
Genet. Mol. Biol.. Publicado em: 19/04/2013
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6. Genetic diversity of the Brazilian Creole cattle Pé-duro assessed by microsatellites and mitochondrial DNA
The objective of this study was to describe the genetic diversity and structure of the largest Pé-duro population by assessing variation at ten autosomal microsatellite (STR) loci and mitochondrial DNA (mtDNA) sequences. The mean expected heterozygosity was 0.755, the mean observed heterozygosity was 0.600 and significant inbreeding coefficient (Fis) and de
R. Bras. Zootec.. Publicado em: 2012-11
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7. Uniparental (mtDNA, Y-chromosome) polymorphisms in French Guiana and two related populations : implications for the region's colonization
Blood samples collected in four Amerindian French Guiana populations (Palikur, Emerillon, Wayampi and Kali’na) in the early 1980s were screened for selected mtDNA and Y-chromosome length polymorphisms, and sequenced for the mtDNA hypervariable segment I (HVS-I). In addition, two other Amerindian populations (Apala´ı and Matsiguenga) were examined for the
Publicado em: 2011
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8. Mitochondrial DNA mapping of social-biological interactions in Brazilian Amazonian African-descendant populations
The formation of the Brazilian Amazonian population has historically involved three main ethnic groups, Amerindian, African and European. This has resulted in genetic investigations having been carried out using classical polymorphisms and molecular markers. To better understand the genetic variability and the micro-evolutionary processes acting in human gro
Publicado em: 2010
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9. Ribeiro's typology, genomes, and Spanish colonialism, as viewed from Gran Canaria and Colombia
Four biallelic and six multiallelic Y-chromosome polymorphisms were investigated in 59 Gran Canarian, 60 North African Berber and 46 Spanish subjects. These new data were merged with equivalent literature information to obtain the parental Y-chrosomomal contribution in Gran Canarians, Colombians, and Venezuelans. The results were then compared, for Gran Cana
Publicado em: 2010
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10. Genetic signatures of parental contribution in black and white populations in Brazil
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the
Publicado em: 2010
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11. Genetic signatures of parental contribution in black and white populations in Brazil
Two hundred and three individuals classified as white were tested for 11 single nucleotide polymorphisms plus two insertion/deletions in their Y-chromosomes. A subset of these individuals (n = 172) was also screened for sequences in the first hypervariable segment of their mitochondrial DNA (mtDNA). In addition, complementary studies were done for 11 of the
Genetics and Molecular Biology. Publicado em: 10/01/2009
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12. Genotipic variability study of Rhipicephalus sanguineus (Latreille, 1806) (Acari, Ixodidae) from different geografic regions of Brazil. / Estudo da variabilidade genotípica de Rhipicephalus sanguineus (Latreille, 1806) (Acari, Ixodidae) de diferentes regiões geográficas do Brasil
The taxonomic status of ticks of the Rhipicephalus sanguineus group is difficult to be determined by phenotypic methods and has been object of frequent revisions and ongoing debate. The differentiation of species within this group has clinical importance, especially in veterinary medicine due to transmission of different pathogens. The objective of this stud
Publicado em: 2008