Haplogroup N in the Americas?

[alchemist223]

Haplogroup N has appeared to be non-existent in the Americas, despite the fact that it is common in the region of Siberia from which the ancestors of Native Americans migrated. However, two haplogroup N samples (belonging to the clade M178) has been found in two Tlicho (https://en.wikipedia.org/wiki/T%C5%82%C4%B1%CC%A8ch%C7%AB) men, a Na-Dene/Athabaskan speaking people in Northern Canada, according to the paper Y-chromosome analysis reveals genetic divergence and new founding native lineages in Athapaskan- and Eskimoan-speaking populations (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3365193) by Dulik, Owings, et. al.

Have there been any other recorded cases of Haplogroup N among indigenous Americans? This seems to be the only recorded case.

[The Saite]

Didn't the new preprint study The genomic formation of First American ancestors in East and Northeast Asia (https://www.biorxiv.org/content/10.1101/2020.10.12.336628v1) spoke about a loss of ancestries happening in Beringia ? maybe selection and drift played a certain role in reduction of Haplogroups among the first inhabitants of America. Not necessary in Mainland Asia tho and not necessary in only archaic ages.

[alchemist223]

Possibly. I find it notable that this case occurs among a Na-Dene people, who arrived in the Americas after most Amerindian groups. Perhaps this plays into the Paleosiberian vs. Neosiberian distinction, with Na-Dene peoples having some Neosiberian ancestry with it being completely lacking in other New World peoples (Paleosiberian lineages belonging to Q, C, and possibly R).