Publications des scientifiques de l'IRD

Patin E., Laval G., Barreiro L.B., Salas A., Semino O., Santachiara-Benerecetti S., Kidd K.K., Kidd J.R., Van Der Veen L., Hombert J.M., Gessain A., Froment Alain, Bahuchet S., Heyer E., Quintana-Murci L. (2009). Inferring the demographic history of African farmers and pygmy hunter-gatherers using a multilocus resequencing data set. PLoS Genetics, 5 (4), art. no e1000448 [13 p. en ligne].

Titre du document
Inferring the demographic history of African farmers and pygmy hunter-gatherers using a multilocus resequencing data set
Année de publication
2009
Type de document
Article référencé dans le Web of Science WOS:000266320200008
Auteurs
Patin E., Laval G., Barreiro L.B., Salas A., Semino O., Santachiara-Benerecetti S., Kidd K.K., Kidd J.R., Van Der Veen L., Hombert J.M., Gessain A., Froment Alain, Bahuchet S., Heyer E., Quintana-Murci L.
Source
PLoS Genetics, 2009, 5 (4), art. no e1000448 [13 p. en ligne]
The transition from hunting and gathering to farming involved a major cultural innovation that has spread rapidly over most of the globe in the last ten millennia. In sub-Saharan Africa, hunter-gatherers have begun to shift toward an agriculture-based lifestyle over the last 5,000 years. Only a few populations still base their mode of subsistence on hunting and gathering. The Pygmies are considered to be the largest group of mobile hunter-gatherers of Africa. They dwell in equatorial rainforests and are characterized by their short mean stature. However, little is known about the chronology of the demographic events-size changes, population splits, and gene flow--ultimately giving rise to contemporary Pygmy (Western and Eastern) groups and neighboring agricultural populations. We studied the branching history of Pygmy hunter-gatherers and agricultural populations from Africa and estimated separation times and gene flow between these populations. We resequenced 24 independent noncoding regions across the genome, corresponding to a total of approximately 33 kb per individual, in 236 samples from seven Pygmy and five agricultural populations dispersed over the African continent. We used simulation-based inference to identify the historical model best fitting our data. The model identified included the early divergence of the ancestors of Pygmy hunter-gatherers and farming populations approximately 60,000 years ago, followed by a split of the Pygmies' ancestors into the Western and Eastern Pygmy groups approximately 20,000 years ago. Our findings increase knowledge of the history of the peopling of the African continent in a region lacking archaeological data. An appreciation of the demographic and adaptive history of African populations with different modes of subsistence should improve our understanding of the influence of human lifestyles on genome diversity.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Société, développement social [106] ; Démographie [108]
Description Géographique
AFRIQUE SUBSAHARIENNE
Localisation
Fonds IRD
Identifiant IRD
PAR00007497
Contact