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2018
- ISIDORE Id: 10670/1.0dc57d...
- hal: hal-02112694
- doi: 10.1016/j.ajhg.2017.11.011
- PUBMED: 29304377
- PUBMEDCENTRAL: PMC5777450
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ajhg.2017.11.011
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info:eu-repo/semantics/altIdentifier/pmid/29304377
info:eu-repo/semantics/OpenAccess
Mots-clés
Comoros East Africa Madagascar admixture migration population genetics -bio]/Genetics/Human genetics -bio]/Genetics/Populations and Evolution [q-bio.PE]Sujets proches
Natural science Sciences Science of scienceCiter ce document
Nicolas Brucato et al., « The Comoros Show the Earliest Austronesian Gene Flow into the Swahili Corridor », HAL SHS (Sciences de l’Homme et de la Société), ID : 10.1016/j.ajhg.2017.11.011
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Résumé
At the dawn of the second millennium, the expansion of the Indian Ocean trading network aligned with the emergence of an outward-oriented community along the East African coast to create a cosmopolitan cultural and trading zone known as the Swahili Corridor. On the basis of analyses of new genome-wide genotyping data and uniparental data in 276 individuals from coastal Kenya and the Comoros islands, along with large-scale genetic datasets from the Indian Ocean rim, we reconstruct historical population dynamics to show that the Swahili Corridor is largely an eastern Bantu genetic continuum. Limited gene flows from the Middle East can be seen in Swahili and Comorian populations at dates corresponding to historically documented contacts. However, the main admixture event in southern insular populations, particularly Comorian and Malagasy groups, occurred with individuals from Island Southeast Asia as early as the 8th century, reflecting an earlier dispersal from this region. Remarkably, our results support recent archaeological and linguistic evidence-based suggestions that the Comoros archipelago was the earliest location of contact between Austronesian and African populations in the Swahili Corridor.
