Along the Indian Ocean coast: genomic variation in Mozambique provides new insights into the Bantu expansion
| Autor: | Jorge Rocha, Sandra Oliveira, João Emílio Almeida, Bérénice Alard, Armando Semo, Anne-Maria Fehn, Carina M. Schlebusch, Magdalena Gayà-Vidal, Cesar Fortes-Lima, António Prista, Albertino Damasceno |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Black People
India Bantu languages Rainforest Biology migration Polymorphism Single Nucleotide Evolution Molecular 03 medical and health sciences 0302 clinical medicine Genetics Chromosomes Human Humans Genetik Molecular Biology Indian Ocean Ecology Evolution Behavior and Systematics Discoveries Mozambique 030304 developmental biology 0303 health sciences Ecology Central africa population structure Cline (biology) Genomics 15. Life on land Emigration and Immigration biology.organism_classification Indian ocean Phylogeography Tanzania Genetics Population Angola Iron Age Biological dispersal admixture Bantu expansion 030217 neurology & neurosurgery |
| Zdroj: | Molecular Biology and Evolution |
| Popis: | The Bantu expansion, which started in West Central Africa around 5,000 BP, constitutes a major migratory movement involving the joint spread of peoples and languages across sub-Saharan Africa. Despite the rich linguistic and archaeological evidence available, the genetic relationships between different Bantu-speaking populations and the migratory routes they followed during various phases of the expansion remain poorly understood. Here, we analyze the genetic profiles of southwestern and southeastern Bantu-speaking peoples located at the edges of the Bantu expansion by generating genome-wide data for 200 individuals from 12 Mozambican and 3 Angolan populations using ∼1.9 million autosomal single nucleotide polymorphisms. Incorporating a wide range of available genetic data, our analyses confirm previous results favoring a “late split” between West and East Bantu speakers, following a joint passage through the rainforest. In addition, we find that Bantu speakers from eastern Africa display genetic substructure, with Mozambican populations forming a gradient of relatedness along a North-South cline stretching from the coastal border between Kenya and Tanzania to South Africa. This gradient is further associated with a southward increase in genetic homogeneity, and involved minimum admixture with resident populations. Together, our results provide the first genetic evidence in support of a rapid North-South dispersal of Bantu peoples along the Indian Ocean Coast, as inferred from the distribution and antiquity of Early Iron Age assemblages associated with the Kwale archaeological tradition. Introduction Results and Discussion - Genetic Variation in Mozambique - Genetic Relationships with Other African Populations Conclusion Materials and Methods - Population Samples - Genotyping and Phasing - Data Merging - Genetic Data Analysis - Linguistic Data Analysis |
| Databáze: | OpenAIRE |
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