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前爱斯基摩人的mtDNA显示母系遗传在格陵兰的断绝

Paleo-Eskimo mtDNA Genome Reveals Matrilineal Discontinuity in Greenland

The Paleo-Eskimo Saqqaq and Independence I cultures,
documented from archaeological remains in Northern
Canada and Greenland, represent the earliest human
expansion into the New World’s northern extremes.
However, their origin and genetic relationship to later
cultures is unknown. We sequenced a mitochondrial
genome from a Paleo-Eskimo human, using 3,400-4,500
year-old frozen hair excavated from an early Greenlandic
Saqqaq settlement. The sample is distinct from modern
Native Americans and Neo-Eskimos, falling within
haplogroup D2a1, a group previously observed among
modern Aleuts and Siberian Sireniki Yuit. This suggests
that the earliest migrants into the New World’s northern
extremes derived from populations in the Bering Sea area,
and were neither directly related to Native Americans nor
the later Neo-Eskimos that replaced them.

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