Genomic portrait and relatedness patterns of the Iron Age Log Coffin culture in northwestern Thailand

Selina Carlhoff (), Wibhu Kutanan, Adam B. Rohrlach, Cosimo Posth, Mark Stoneking, Kathrin Nägele, Rasmi Shoocongdej () and Johannes Krause ()
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Selina Carlhoff: Max Planck Institute for Evolutionary Anthropology
Wibhu Kutanan: Naresuan University
Adam B. Rohrlach: Max Planck Institute for Evolutionary Anthropology
Cosimo Posth: University of Tübingen
Mark Stoneking: Max Planck Institute for Evolutionary Anthropology
Kathrin Nägele: Max Planck Institute for Evolutionary Anthropology
Rasmi Shoocongdej: Silpakorn University
Johannes Krause: Max Planck Institute for Evolutionary Anthropology

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract The Iron Age of highland Pang Mapha, northwestern Thailand, is characterised by a mortuary practice known as Log Coffin culture. Dating between 2300 and 1000 years ago, large coffins carved from individual teak trees have been discovered in over 40 caves and rock shelters. While previous studies focussed on the cultural development of the Log Coffin-associated sites, the origins of the practice, connections with other wooden coffin-using groups in Southeast Asia, and social structure within the region remain understudied. Here, we present genome-wide data from 33 individuals from five Log Coffin culture sites to study genetic ancestry profiles and genetic interconnectedness. The Log Coffin-associated genomes can be modelled as an admixture between Hòabìnhian hunter-gatherer-, Yangtze River farmer-, and Yellow River farmer-related ancestry. This indicates different influence spheres from Bronze and Iron Age individuals from northeastern Thailand as reflected by cultural practices. Our analyses also identify close genetic relationships within the sites and more distant connections between sites in the same and different river valleys. In combination with high mitochondrial haplogroup diversity and genome-wide homogeneity, the Log Coffin-associated groups from northwestern Thailand seem to have been a large, well-connected community, where genetic relatedness played a significant role in the mortuary ritual.

Date: 2023
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DOI: 10.1038/s41467-023-44328-2

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