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The Kets, an ethnic group in the Yenisei River basin, Russia, are consideredthe last nomadic hunter-gatherers of Siberia, and Ket language has notransparent affiliation with any language family. We investigated connectionsbetween the Kets and Siberian and North American populations, with emphasis onthe Mal'ta and Paleo-Eskimo ancient genomes using original data from 46unrelated samples of Kets and 42 samples of their neighboring ethnic groups(Uralic-speaking Nganasans, Enets, and Selkups). We genotyped over 130,000autosomal SNPs, determined mitochondrial and Y-chromosomal haplogroups, andperformed high-coverage genome sequencing of two Ket individuals. Weestablished that the Kets belong to the cluster of Siberian populations relatedto Paleo-Eskimos. Unlike other members of this cluster (Nganasans, Ulchi,Yukaghirs, and Evens), Kets and closely related Selkups have a high degree ofMal'ta ancestry. Implications of these findings for the linguistic hypothesisuniting Ket and Na-Dene languages into a language macrofamily are discussed.

Genomic study of the Ket: a Paleo-Eskimo-related ethnic group with significant ancient North Eurasian ancestry