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Ly G., Alard B., Laurent R., Lafosse S., Toupance B., Monidarin C., Diffloth G., Bourdier Frédéric, Evrard Olivier, Pavard S., Chaix R. (2018). Residence rule flexibility and descent groups dynamics shape uniparental genetic diversities in South East Asia. American Journal of Physical Anthropology, 165 (3), 480-491. ISSN 0002-9483

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Lien direct chez l'éditeur doi:10.1002/ajpa.23374

Titre
Residence rule flexibility and descent groups dynamics shape uniparental genetic diversities in South East Asia
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000425728300006
AuteursLy G., Alard B., Laurent R., Lafosse S., Toupance B., Monidarin C., Diffloth G., Bourdier Frédéric, Evrard Olivier, Pavard S., Chaix R.
SourceAmerican Journal of Physical Anthropology, 2018, 165 (3), p. 480-491. ISSN 0002-9483
RésuméObjectives Social organization plays a major role in shaping human population genetic diversity. In particular, matrilocal populations tend to exhibit less mitochondrial diversity than patrilocal populations, and the other way around for Y chromosome diversity. However, several studies have not replicated such findings. The objective of this study is to understand the reasons for such inconsistencies and further evaluate the influence of social organization on genetic diversity. Materials and Methods We explored uniparental diversity patterns using mitochondrial HV1 sequences and 17 Y-linked short tandem repeats (STRs) in 12 populations (n=619) from mainland South-East Asia exhibiting a wide range of social organizations, along with quantitative ethno-demographic information sampled at the individual level. Results MtDNA diversity was lower in matrilocal than in multilocal and patrilocal populations while Y chromosome diversity was similar among these social organizations. The reasons for such asymmetry at the genetic level were understood by quantifying sex-specific migration rates from our ethno-demographic data: while female migration rates varied between social organizations, male migration rates did not. This unexpected lack of difference in male migrations resulted from a higher flexibility in residence rule in patrilocal than in matrilocal populations. In addition, our data suggested an impact of clan fission process on uniparental genetic patterns. Conclusions The observed lack of signature of patrilocality on Y chromosome patterns might be attributed to the higher residence flexibility in the studied patrilocal populations, thus providing a potential explanation for the apparent discrepancies between social and genetic structures. Altogether, this study highlights the need to quantify the actual residence and descent patterns to fit social to genetic structures.
Plan de classementSociété, développement social [106] ; Démographie [108] ; Sciences fondamentales / Techniques d'analyse et de recherche [020]
Descr. géo.CAMBOGDE LAOS
LocalisationFonds IRD [F B010072399]
Identifiant IRDfdi:010072399
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010072399

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