Papua New Guinean genomes reveal the complex settlement of north Sahul

Brucato, Nicolas, André, Mathilde, Tsang, Roxanne, Saag, Lauri, Kariwiga, Jason, Sesuki, Kylie, Beni, Teppsy, Pomat, William, Muke, John, Meyer, Vincent, Boland, Anne, Deleuze, Jean-François, Sudoyo, Herawati, Mondal, Mayukh, Pagani, Luca, Gallego Romero, Irene, Metspalu, Mait, Cox, Murray, Leavesley, Matthew, and Ricaut, François-xavier (2021) Papua New Guinean genomes reveal the complex settlement of north Sahul. Molecular Biology and Evolution, 38 (11). pp. 5107-5121.

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Abstract

The settlement of Sahul, the lost continent of Oceania, remains one of the most ancient and debated human migrations. Modern New Guineans inherited a unique genetic diversity tracing back 50,000 years, and yet there is currently no model reconstructing their past population dynamics. We generated 58 new whole-genome sequences from Papua New Guinea, filling geographical gaps in previous sampling, specifically to address alternative scenarios of the initial migration to Sahul and the settlement of New Guinea. Here, we present the first genomic models for the settlement of northeast Sahul considering one or two migrations from Wallacea. Both models fit our data set, reinforcing the idea that ancestral groups to New Guinean and Indigenous Australians split early, potentially during their migration in Wallacea where the northern route could have been favored. The earliest period of human presence in Sahul was an era of interactions and gene flow between related but already differentiated groups, from whom all modern New Guineans, Bismarck islanders, and Indigenous Australians descend. The settlement of New Guinea was probably initiated from its southeast region, where the oldest archaeological sites have been found. This was followed by two migrations into the south and north lowlands that ultimately reached the west and east highlands. We also identify ancient gene flows between populations in New Guinea, Australia, East Indonesia, and the Bismarck Archipelago, emphasizing the fact that the anthropological landscape during the early period of Sahul settlement was highly dynamic rather than the traditional view of extensive isolation.

Item ID: 69890
Item Type: Article (Research - C1)
ISSN: 1537-1719
Keywords: Papuan, human genome, demographic history, Sahul, Oceania
Copyright Information: © The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
Funders: National Geographic Society, Leakey Foundation, European Union Horizon 2020
Projects and Grants: EU H2020
Date Deposited: 08 Nov 2021 02:26
FoR Codes: 45 INDIGENOUS STUDIES > 4513 Pacific Peoples culture, language and history > 451301 Archaeology of New Guinea and Pacific Islands (excl. New Zealand) @ 30%
43 HISTORY, HERITAGE AND ARCHAEOLOGY > 4301 Archaeology > 430101 Archaeological science @ 70%
SEO Codes: 13 CULTURE AND SOCIETY > 1307 Understanding past societies > 130799 Understanding past societies not elsewhere classified @ 100%
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