Ancient human parallel lineages within North America contributed to a coastal expansion

AI interpretationAI-generated

Two ancient North American ancestries shaped the peopling of the Americas.

This study analyzed 91 ancient genomes from California and Ontario. It reveals two distinct ancestral populations in North America that likely split south of the ice sheets. Both ancestries contributed to all modern Central and South Americans, suggesting a coastal dispersal with multiple admixture events. This challenges the idea of a single founding population.

• Two distinct ancestries existed in ancient North America, possibly splitting south of the ice sheets.
• Both ancestries contributed to all modern Central and South Americans.
• The proportions of these ancestries match a coastal dispersal model with multiple admixture events.

Sample interpretation

The 17 ancient samples are all male, with Y haplogroups exclusively Q, dominated by Q-M3 (6). Mitochondrial DNA is mainly A2c (6) and A2cb (2), with one C1b41a1. Most samples come from one site (ERR2604067, n=16), limiting geographic diversity. Cultures include Alaskan Athabaskan and ASO.

For genealogy enthusiasts

For ancestry enthusiasts, this means your Native American roots may trace back to two ancient North American lineages, not just one. Coastal migration and mixing were key, so expect complex admixture in your DNA results.