학술논문
Positive selection in the genomes of two Papua New Guinean populations at distinct altitude levels
Document Type
article
Author
Mathilde André; Nicolas Brucato; Georgi Hudjasov; Vasili Pankratov; Danat Yermakovich; Francesco Montinaro; Rita Kreevan; Jason Kariwiga; John Muke; Anne Boland; Jean-François Deleuze; Vincent Meyer; Nicholas Evans; Murray P. Cox; Matthew Leavesley; Michael Dannemann; Tõnis Org; Mait Metspalu; Mayukh Mondal; François-Xavier Ricaut
Source
Nature Communications, Vol 15, Iss 1, Pp 1-15 (2024)
Subject
Language
English
ISSN
2041-1723
Abstract
Abstract 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.