Nucleotide variability of HV-I in admixed population of the Brazilian Amazon Region

Feio-dos-Santos, Ana Cecília; Carvalho, Berta; Santos, Sidney Emanuel Batista dos; Ribeiro-dos-Santos, Ândrea

doi:10.1016/j.forsciint.2005.12.032

Cited by 12 publications

(6 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the notable finding related to the Gauchos is that the mtDNA Amerindian proportion (52%) is similar to those observed in northern Brazilian/Amazonian populations (54-64%) [33,80] . These results suggest that the contemporary Gauchos have the most important reservoir of Amerindian mtDNA lineages in Brazil outside the Amazonian region.…”

Section: Discussionsupporting

confidence: 59%

Pre- and Post-Columbian Gene and Cultural Continuity: The Case of the <i>Gaucho</i> from Southern Brazil

et al. 2007

View full text Add to dashboard Cite

Objective: To investigate the evolutionary and demographic history of the Gaucho, a distinct population of southern Brazil, relating it to their culture, to assess possible parallel continuity. Methods: Six binary polymorphisms, an Alu insertion polymorphism (YAP) and 12 short tandem repeat loci in the non-recombining region of the Y-chromosome, as well as the sequence of the first hypervariable segment (HVS-I) of the mitochondrial DNA (mtDNA) control region were studied in 150 unrelated males born in the Pampa region of Rio Grande do Sul. Results: Comparison of the results with the other Brazilian and Uruguayan populations, as well as with their putative ancestors, indicated a stronger male Spanish influence than that observed elsewhere in Brazil, a former Portuguese colony. Extensive mtDNA analyses of their Amerindian component gave clear indications of the presence there of material from extinct (Charrua), as well as extant (Guarani) tribes. Conclusions: The genetic analyses contributed in a significant way to reveal that the known cultural continuity between pre- and post-Columbian Pampa populations was also accompanied by an extraordinary genetic continuity.

show abstract

Section: Discussionsupporting

confidence: 59%

Pre- and Post-Columbian Gene and Cultural Continuity: The Case of the <i>Gaucho</i> from Southern Brazil

et al. 2007

View full text Add to dashboard Cite

show abstract

“…In the present study, the samples were aligned and subjected to phylogenetic analyses with other groups of samples from previous mitochondrial studies [24,25,[45][46][47]. An NJ tree (Figure 2) of this data set gives tenuous support for separation into seven clusters.…”

Section: Resultsmentioning

confidence: 93%

“…Of these, only the mutations in bold are consensually accepted as haplogroup motifs. In order to assign the haplogroups, scientific articles [24,25,45,46,[54][55][56] and databases specialized in mtDNA analysis HaploGrep (http://haplogrep.uibk.ac.at/) and Phylotree (http://www.phylotree.org/) were used.…”

Section: Resultsmentioning

confidence: 99%

Paleogenetic Studies in Guajajara Skeletal Remains, Maranhão State, Brazil

Leite

Leitão

Schaan

et al. 2014

Journal of Anthropology

View full text Add to dashboard Cite

In the early 17th century, French and Portuguese colonizers and Jesuit priests settled in the state of Maranhão and made contact with the Guajajara, an ethnic group that lived along the margins of the Pindaré River. The Guajajara maintained contact with Brazilian national society over the centuries, including with Brazilian admixed populations, and with African slaves that flocked towards the region from the 18th century onwards. The present study investigates the origins of this admixture using mitochondrial genetic variability. The bones of 12 individuals investigated, which are currently part of the collection of the National Museum, were tested for genetic diversity. aDNA was extracted by the phenol-chloroform method and by DNA IQ (Promega, Madison, WI, USA). Amplification of the HVS I region was performed by PCR, followed by direct sequencing using the Big Dye kit (Life Technologies, Foster City, CA, USA). This region was found to represent haplogroups of Amerindians (A, C, and D) and Africans (L, L1b, L1c, and L3). The presence of African haplogroups in Guajajara bones from as early as the 18th century is consistent with historical and anthropological data, suggesting the admixture with Africans and/or Afrodescendants. Therefore, this study demonstrates that women with African haplogroups were introduced into the Guajajara population.

show abstract

“…The remaining populations are the Garifunas in Belize [44], some English-speaking Caribbean groups such as St Kitts, St Vincent and St Lucia [45], Afro-Venezuelians in Curiepe [5] and the black communities of Porto Alegre, Rio de Janeiro in Brazil [46,47]. The 71 maternal lineages of other African American or urban hybridised communities were highly different from the Noir Marron (Fst > 0.25), such as the neighbouring Afro-Brazilian groups, notably due to their Amerindian ancestry [5,47-51]. …”

Section: Resultsmentioning

confidence: 99%

The imprint of the Slave Trade in an African American population: mitochondrial DNA, Y chromosome and HTLV-1 analysis in the Noir Marron of French Guiana

et al. 2010

View full text Add to dashboard Cite

BackgroundRetracing the genetic histories of the descendant populations of the Slave Trade (16th-19th centuries) is particularly challenging due to the diversity of African ethnic groups involved and the different hybridisation processes with Europeans and Amerindians, which have blurred their original genetic inheritances. The Noir Marron in French Guiana are the direct descendants of maroons who escaped from Dutch plantations in the current day Surinam. They represent an original ethnic group with a highly blended culture. Uniparental markers (mtDNA and NRY) coupled with HTLV-1 sequences (env and LTR) were studied to establish the genetic relationships linking them to African American and African populations.ResultsAll genetic systems presented a high conservation of the African gene pool (African ancestry: mtDNA = 99.3%; NRY = 97.6%; HTLV-1 env = 20/23; HTLV-1 LTR = 6/8). Neither founder effect nor genetic drift was detected and the genetic diversity is within a range commonly observed in Africa. Higher genetic similarities were observed with the populations inhabiting the Bight of Benin (from Ivory Coast to Benin). Other ancestries were identified but they presented an interesting sex-bias. Whilst male origins spread throughout the north of the bight (from Benin to Senegal), female origins were spread throughout the south (from the Ivory Coast to Angola).ConclusionsThe Noir Marron are unique in having conserved their African genetic ancestry, despite major cultural exchanges with Amerindians and Europeans through inhabiting the same region for four centuries. Their maroon identity and the important number of slaves deported in this region have maintained the original African diversity. All these characteristics permit to identify a major origin located in the former region of the Gold Coast and the Bight of Benin; regions highly impacted by slavery, from which goes a sex-biased longitudinal gradient of ancestry.

show abstract

Nucleotide variability of HV-I in admixed population of the Brazilian Amazon Region

Cited by 12 publications

References 5 publications

Pre- and Post-Columbian Gene and Cultural Continuity: The Case of the <i>Gaucho</i> from Southern Brazil

Pre- and Post-Columbian Gene and Cultural Continuity: The Case of the <i>Gaucho</i> from Southern Brazil

Paleogenetic Studies in Guajajara Skeletal Remains, Maranhão State, Brazil

The imprint of the Slave Trade in an African American population: mitochondrial DNA, Y chromosome and HTLV-1 analysis in the Noir Marron of French Guiana

Contact Info

Product

Resources

About