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Denisovan DNA in the early human genome in East Asia



Denisovan DNA in the early human genome in East Asia

The yellow cap found in the Solkit Valley in eastern Mongolia belongs to a female who lived 34,000 years ago. Analysis shows that she inherited approximately 25% of the DNA from Western Eurasia.Image source: Institute of Archaeology, Mongolian Academy of Sciences

The researchers analyzed the genome of the oldest human fossil found in Mongolia so far, and the results showed that the 34,000-year-old woman inherited about 25% of her DNA from western Eurasia, which indicates that people were found shortly after being first discovered. Crossed Eurasia. Settled by the ancestors of the current population. This person and a 40,000-year-old man from China also carried the DNA of Denisovans, an extinct human form that had lived in Asia before the arrival of modern humans.


In 2006, miners discovered a per capita yellow skull with unique morphological characteristics in the Solkit River Valley in Norovlin County, eastern Mongolia. It was originally called Mongolanthropus and was considered a caveman, even Homo erectus. The remains of the “Salkhit”

; instance represent the only Pleistocene fossil in the country.

The ancient DNA extracted from the beanie shows that it belongs to a modern female woman who lived 34,000 years ago, and has a greater relationship with Asians than with Europeans. A comparison with the genetic studies of the only other early East Asian individuals so far shows that this is a 40,000-year-old male from Tianyuan Cave outside Beijing (China). The two individuals are related to each other. However, the difference between them is that one-fourth of the ancestors of the Sarkits came from Eurasia in the West, probably through mixing with the ancient Siberians.

Migration and interaction

The lead author of the Max-Planck Institute of Anthropology and researcher Dijando Masilani said: “This directly proves that the modern human community in East Asia was cosmopolitan as early as 34,000 years ago.” Rare specimens indicate that migration and interaction between populations across Eurasia occurred about 35,000 years ago.”

Speed ​​up the video of the excavation of the Baishigu Karst Cave.Image source: Han Yuanyuan, Zhang Dongju, Lanzhou University

The researchers used a new method developed by the Max Planck Institute for Evolutionary Anthropology to find DNA fragments in the extinct human element in the genomes of Salkhit and Tianyuan. They found that the two genomes contained not only Neandertal DNA, but also DNA from Denisovans, a relative of an elusive Asian Neanderthal. “It is surprising that the ancestors of the oldest humans in East Asia from which we can obtain genetic data have been mixed with Denisovans. Denisovans is an extinct human hormone that has contributed to the populations of Asia and Oceania today”, Said Byambaa Gunchinsuren, a researcher at the Institute of Archaeology of the Mongolian Academy of Sciences. “This directly proves that the Denisovans and modern humans met and merged more than 40,000 years ago.”

Denisovan DNA in the early human genome in East Asia

Xiahe Mandible. Credit: Menghan Qiu, Dongju Zhang, Lanzhou University

“Interestingly, the Denisovan DNA fragments in these very ancient East Asians overlap with the Denisovan DNA fragments in the genomes of the East Asian population today, but they do not overlap with the Denisovan DNA fragments in Oceania. This supports the many times between Denisovans and humans. A model of independent mixed events. Modern humans.” Masilani said.

The research report is in the journal science.


Neanderthals have older mothers and younger fathers


More information:
D. Massilani et al., “Denisovan Lineage and Population History of Tonesian People”, science (2020). science.sciencemag.org/cgi/doi…1126 / science.abc1166

D. Zhang et al. , “Denisovan DNA in Late Pleistocene Sediments from Baishiya Karst Caves on the Qinghai-Tibet Plateau”, science (2020). science.sciencemag.org/cgi/doi…1126 / science.abb6320

Courtesy of the Max Planck Institute

Citation: Denisovan DNA in the early East Asia (2020, October 29) genome was downloaded from https://phys.org/news/2020-10-denisovan-dna-genome-early-east.html on October 31, 2020 Search

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