Evidence of Austronesian Genetic Lineages in East Africa and South Arabia: Complex Dispersal from Madagascar and Southeast Asia.

摘要: The Austronesian dispersal across the Indonesian Ocean to Madagascar and Comoros has been well documented, but in an unexplained anomaly, few no traces have found of expansion East Africa or Arabian Peninsula. To revisit this peculiarity, we surveyed Western Indian rim populations identify potential genetic ancestry. We generated full mitochondrial DNA genomes genome-wide genotyping data for these individuals compared them with Banjar, source population westward dispersal. find strong support Asian contributions maternal lineages autosomal variation modern day Somalia Yemen. Surprisingly, input reveals two apparently different geographic origins timings admixture contact; one at a very early phase (likely associated dispersals), later movement dating end nineteenth century. These gene flows come, respectively, from directly unidentified location Island Southeast Asia. This result far more complex dynamic dispersals through than previously understood suggests that movements within may part lengthy process, probably continuing into era.