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2011
- handle: 10670/1.yte0dx
- Moreau Claudia, Vézina Hélène, Jomphe Michèle, Lavoie Ève-Marie, Roy-Gagnon Marie-Hélène et Labuda Damian. (2011). When genetics and genealogies tell different stories-maternal lineages in Gaspesia. Annals of Human Genetics, 75, (2), p. 247-254.
- doi: 10.1111/j.1469-1809.2010.00617.x
Ce document est lié à :
https://constellation.uqac.ca/id/eprint/8290/
Ce document est lié à :
https://dx.doi.org/doi:10.1111/j.1469-1809.2010.00 [...]
Ce document est lié à :
doi:10.1111/j.1469-1809.2010.00617.x
Mots-clés
Histoire Démographie Génétique mtDNA genealogy genetic ancestry admixture Native American Quebec populationSujets proches
Populations, Human Human populations Population growth Human populationCiter ce document
Claudia Moreau et al., « When genetics and genealogies tell different stories-maternal lineages in Gaspesia », Constellation - Université du Québec à Chicoutimi, ID : 10.1111/j.1469-1809.2010.00617.x
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Résumé
Data from uniparentally inherited genetic systems were used to trace evolution of human populations. Reconstruction of the past primarily relies on variation in present-day populations, limiting historical inference to lineages that are found among living subjects. Our analysis of four population groups in the Gaspé Peninsula, demonstrates how this may occasionally lead to erroneous interpretations. Mitochondrial DNA analysis of Gaspesians revealed an important admixture with Native Americans. The most likely scenario links this admixture to French-Canadians from the St. Lawrence Valley who moved to Gaspesia in the 19th century. However, in contrast to genetic data, analysis of genealogical record shows that Native American maternal lineages were brought to Gaspesia in the 18th century by Acadians who settled on the south-western coast of the peninsula. Intriguingly, within three generations, virtually all Métis Acadian families separated from their nonadmixed relatives and moved eastward mixing in with other Gaspesian groups, in which Native American maternal lines are present in relatively high frequencies. Over time, the carriers of these lines eventually lost memory of their mixed Amerindian-Acadian origin. Our results show that a reliable reconstruction of population history requires cross-verification of different data sources for consistency, thus favouring multidisciplinary approaches.