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When genetics and genealogies tell different stories-maternal lineages in Gaspesia

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.

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URL officielle: https://dx.doi.org/doi:10.1111/j.1469-1809.2010.00...

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.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:00034800
Volume:75
Numéro:2
Pages:p. 247-254
Version évaluée par les pairs:Oui
Date:2011
Identifiant unique:10.1111/j.1469-1809.2010.00617.x
Sujets:Sciences sociales et humaines > Sciences humaines > Histoire
Sciences sociales et humaines > Sciences sociales > Démographie
Sciences de la santé > Sciences médicales > Génétique
Département, module, service et unité de recherche:Départements et modules > Département des sciences humaines
Mots-clés:mtDNA, genealogy, genetic ancestry, admixture, Native American, Quebec population
Déposé le:08 oct. 2022 19:39
Dernière modification:08 oct. 2022 19:39
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