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Article dans une revue Nature Communications Année : 2024

Positive selection in the genomes of two Papua New Guinean populations at distinct altitude levels

Mathilde André
Vasili Pankratov
Danat Yermakovich
Rita Kreevan
Nicholas Evans
Michael Dannemann
Mait Metspalu

Résumé

Highlanders and lowlanders of Papua New Guinea have faced distinct environmental stress, such as hypoxia and environment-specific pathogen exposure, respectively. In this study, we explored the top genomics regions and the candidate driver SNPs for selection in these two populations using newly sequenced whole-genomes of 54 highlanders and 74 lowlanders. We identified two candidate SNPs under selection - one in highlanders, associated with red blood cell traits and another in lowlanders, which is associated with white blood cell count – both potentially influencing the heart rate of Papua New Guineans in opposite directions. We also observed four candidate driver SNPs that exhibit linkage disequilibrium with an introgressed haplotype, highlighting the need to explore the possibility of adaptive introgression within these populations. This study reveals that the signatures of positive selection in highlanders and lowlanders of Papua New Guinea align closely with the challenges they face, which are specific to their environments.
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Dates et versions

hal-04616627, version 1 (18-06-2024)

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Mathilde André, Nicolas Brucato, Georgi Hudjasov, Vasili Pankratov, Danat Yermakovich, et al.. Positive selection in the genomes of two Papua New Guinean populations at distinct altitude levels. Nature Communications, 2024, 15 (1), pp.3352. ⟨10.1038/s41467-024-47735-1⟩. ⟨hal-04616627⟩
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