They did not participate in the demographic growth driven by agriculture that transformed Europe and much of Asia. Trajectory left scars in his genome.
For decades that unique physical traits From the people of Papua New Guinea intrigue scientists, and now Artificial Intelligence (IA) can provide answers to the long questions around their complex origin.
According to recent AI-based analyzes, Papua-New Guinea share a common ancestry with other Asian peoples. The appearance of the new-new papaineenses has long feeded the narrative that they could descend from a distinct human lineage, separated from the other non-African populations, but the similarity may after all, it is due to natural selection processes and adaptation to the tropical climate, not a different genetic origin, the new investigation points out, on July 9 in nature communications.
The results challenge the hypothesis of the so -called “first output of Africa” – which argued that the ancestors of the papuasi would have been part of an initial migration, prior to that of the remaining modern humans, following a coastal route through southern Asia.
Although archaeological traces in Oceania, about 50 to 60,000 years, suggest very old human occupation, new genetic data do not confirm a separate lineage. Studies to Mitochondrial DNA and Y chromosome indicate that these peoples descend from the same dispersion event that originated the other non -African populationsoccurred about 50 to 70 thousand years.
A singular data of papássia genetics is the high proportion of DNA of Denisovanosa – An extinct human group appeared to the Neanderthals, recalls the main author of the study to. This genetic inheritance will have resulted from crosses between the ancestors of the new-New Papua and Denisovans populations in Southeast Asia or Oceania.
According to the investigators, the ancestors of the new-New Papua-News faced a marked “population strangulation” after reaching the New Guinea Papua-a drastic reduction in the number of individuals who lasted for thousands of years. Unlike other non-African peoples, they did not participate in the demographic growth driven by agriculture that transformed Europe and much of Asia, remaining relatively isolated. This unique demographic trajectory left marks on its genome that, misunderstood, could seem evidence of genetic contributions from unknown populations.
Still, scientists admit that some issues remain open, such as the possibility of residual traits of this hypothetical “first output of Africa.”
