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A population Hub out of Africa explains East Asian lineages in Europe 45,000 years ago

Schematic of Eurasian people due to repeated waves of expansion from outside the African population hub (gray shaded area, exact location unknown). Red arrows represent expansions related to early Paleolithic material culture, and blue arrows represent expansions related to late Paleolithic communities. Kya = kylo years ago. Credits: Leonardo Vallini, Giulia Marciani

Ancient humans remain excavated in the Bachokilo Cave (now Bulgaria), Recently genetically described Surprisingly, it was reported to be more closely associated with modern East Asians than with modern Europeans. Several scenarios have been proposed to explain this finding, but this mysterious result can so far explain the existence of genetically East Asian individuals in Europe about 45,000 years ago. It raised more questions than the answer on the underlying ancient migration.

Research published in Genome biology and evolution We sought to solve this mystery by placing these individuals in the broader context of the Eurasian Paleolithic human genome and co-analyzing genetic and archaeological evidence. The study was led by Professors Leonardo Vallini and Luca Pagani of the University of Padua in collaboration with Dr. Giulia Marciani and Professor Stefano Benazzi of the University of Bologna, Italy.

In the scenario proposed by the author, the colonization of East Eurasia and West Eurasia was characterized by several events of expansion from the population hub and local extinction. A few years ago.

The early unsuccessful expansion of Homo sapiens occurred earlier than 45,000 years ago. The only representative of the migration, unrelated to modern Europeans and modern Asians, was recovered from the present-day Zlatý kůň in the Czech Republic, but it is still unknown how widespread it was.

“Then, at about 45 kya, a new expansion, emanating from the hub and colonized over a wide area from Europe to East Asia and Oceania, is associated with production modes. Stone tool Known as the Early Upper Paleolithic, “says Leonardo Valini, the lead author of the study.

The fate of these settlers was different in East Asia and Europe: in the former they endured and eventually led to the formation of a modern population in East Asia, but the European representatives of this expansion declined and Almost disappeared, leaving Bachokilo, an elusive Oase individual from Romania and some others remain the only evidence of this early people in Europe.

“It’s strange to note that at about the same time, the last Neanderthals were also extinct,” said Julia Marciani of the University of Bologna, co-author of the study.

“Finally, the last expansion occurred before 38 kya and was re-colonized to Europe from the same population hub. Its location has not yet been revealed,” said Luca Pagani, senior author of the study. Says. “Even in Europe there were occasional interactions with survivors of the previous wave, but the widespread generalized mixture between the two waves occurs only in Siberia, where it has a unique ancestor known as ancestral northern Eurasia. Produced and it ultimately contributed to its ancestors Native American. “

This migration is associated with a different cultural rally named Upper Paleolithic that characterizes Europe’s major Paleolithic sites. “From a cultural point of view, it is worth noting that these new stone tools are often depicted as independent assemblies rather than local developments of existing European technology. Genetic and cultural information “A comprehensive scenario,” said Telmo Pievani of the University of Padua, concluding that he is a co-author of the study.

The authors conclude that further efforts should be made to clarify the geographic location of the hub and identify the internal and external causes underlying these ancient migrations, as well as the associated cultural dynamics. It is attached.

Genome analysis reveals the migration of unknown ancients in Europe

For more information:
Genetics and material culture support the repeated expansion of Africa’s population hub to Paleolithic Eurasia. Genome biology and evolution (2022). DOI: 10.1093 / gbe / evac045

Courtesy of the University of Bologna

Quote: The African Population Hub describes the East Asian pedigree of Europe 45,000 years ago (April 7, 2022). .html

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