The Ancient Beringian (AB) is a human

archaeogenetic Archaeogenetics is the study of ancient DNA using various molecular genetic methods and DNA resources. This form of genetic analysis can be applied to human, animal, and plant specimens. Ancient DNA can be extracted from various fossilized specime ...

lineage, based on the genome of an infant found at the Upward Sun River site (dubbed USR1), dated to 11,500 years ago. The AB lineage diverged from the Ancestral Native American (ANA) lineage about 20,000 years ago. The ANA lineage was estimated as having been formed between 20,000 and 25,000 years ago by a mixture of

East Asian East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Ja ...

(~65%) and

Ancient North Eurasian In archaeogenetics, the term Ancient North Eurasian (ANE) refers to an ancestral component that represents the lineage of the people of the Mal'ta–Buret' culture () and populations closely related to them, such as the Upper Paleolithic individ ...

(~35%) lineages, consistent with the model of the

peopling of the Americas It is believed that the peopling of the Americas began when Paleolithic hunter-gatherers (Paleo-Indians) entered North America from the North Asian Mammoth steppe via the Beringia land bridge, which had formed between northeastern Siberia and we ...

via

Beringia Beringia is defined today as the land and maritime area bounded on the west by the Lena River in Russia; on the east by the Mackenzie River in Canada; on the north by 70th parallel north, 72° north latitude in the Chukchi Sea; and on the south ...

during the

Last Glacial Maximum The Last Glacial Maximum (LGM), also referred to as the Last Glacial Coldest Period, was the most recent time during the Last Glacial Period where ice sheets were at their greatest extent between 26,000 and 20,000 years ago. Ice sheets covered m ...

Research

The Ancient Beringian lineage is extinct, and is not found as a contribution to modern indigenous lineages in

Alaska Alaska ( ) is a non-contiguous U.S. state on the northwest extremity of North America. Part of the Western United States region, it is one of the two non-contiguous U.S. states, alongside Hawaii. Alaska is also considered to be the north ...

. The 2018 study suggests that the AB lineage was replaced by or absorbed in a back-migration of "North Native American" (NNA) to Alaska. The modern

Athabaskan Athabaskan ( ; also spelled ''Athabascan'', ''Athapaskan'' or ''Athapascan'', and also known as Dene) is a large branch of the Na-Dene language family of North America, located in western North America in three areal language groups: Northern, ...

populations are derived from an admixture of this NNA back-migration and a

Paleo-Siberian The Paleo-Siberian languages are several language isolates and small language families spoken in parts of Siberia. They are not known to have any genetic relationship to each other; their only common link is that they are held to have antedated ...

(

Early Paleo-Eskimo The Early Paleo-Eskimo is the first of three distinct periods of human occupation recognized by archaeologists in the eastern North American Arctic, the others being the Late Paleo-Eskimo and the Thule. Dates for these occupations vary according ...

) lineage before about 2,500 years ago. The discovery was made from

analyses on the remains of two female infants discovered in 2013 at the Upward Sun River site (USR). The USR site is affiliated with the

Denali Complex The Paleo-Arctic Tradition is the name given by archaeologists to the cultural tradition of the earliest well-documented human occupants of the North American Arctic, which date from the period 8000–5000 BC. The tradition covers Alaska, and e ...

, a dispersed archaeological culture of the American Arctic. The genomic analysis of nuclear DNA of the older of the two infants (USR1) was done at the

Centre for Geogenetics The Centre for Geogenetics is a Danish Basic Research Centre of Excellence (Grundforskningscenter) which officially opened in September 2010. It is located at the Natural History Museum of Denmark, University of Copenhagen and financed by the Danis ...

at the

University of Copenhagen The University of Copenhagen (, KU) is a public university, public research university in Copenhagen, Copenhagen, Denmark. Founded in 1479, the University of Copenhagen is the second-oldest university in Scandinavia, after Uppsala University. ...

Natural History Museum of Denmark The Natural History Museum of Denmark () is a natural history museum located in Copenhagen, Denmark. It is affiliated with the University of Copenhagen The museum became an organizational entity in 2004 with the merger of Copenhagen's Zoological ...

. Results from the team's genetic analysis were published in January 2018 in the scientific journal ''

Nature Nature is an inherent character or constitution, particularly of the Ecosphere (planetary), ecosphere or the universe as a whole. In this general sense nature refers to the Scientific law, laws, elements and phenomenon, phenomena of the physic ...

''. The analysis compared the infant's genomes with both ancient and contemporary genomes. The results suggested that the pre-"Ancestral Native American" lineage derived from the East Asian lineage after 36 kya, with gene flow until about 25 kya. During 25–20 kya, this lineage was later substantially mixed with the

lineage (~35%), who are described as the "result of a palaeolithic admixture" between ancient West Eurasians and ancient East Eurasians, to form the "Ancestral Native American" lineage by 20 kya. The "Ancient Beringian" (AB) lineage derived from ANA and persisted without significant admixture in Alaska until the time of USR1, some 8,000 years later. The lineage of other

Paleo-Indians Paleo-Indians were the first peoples who entered and subsequently inhabited the Americas towards the end of the Late Pleistocene period. The prefix ''paleo-'' comes from . The term ''Paleo-Indians'' applies specifically to the lithic period in ...

diverged from AB at ca. 20–18 kya, and further divided into "North Native American" (NNA) and "South Native American" lineages between 17.5 kya and 14.6 kya, reflecting the dispersal associated with the early

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* * * {{human genetics AB Pleistocene North America Peopling of the Americas Prehistory of the Arctic Paleo-Indian people Native American history of Alaska

Research

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