Gastvortrag Pavel Flegontov
11:00 - 12:30
University of Ostrava
MPI SHH Jena
Siberian ancestry in Na-Dene speakers, where did it come from?
Abstract:According to the three-wave model of settlement of the Americas, a
majority of modern Native Americans come from the first migration wave.
Two migrations of smaller scale occurred around 5,000 and 1,000 YBP,
bringing Paleo-Eskimos (nowadays extinct) and modern Eskimos/Inuits,
respectively, to the north of the continent. While modern descendants of
the first and third waves are clearly identifiable, this is not the
case for the second wave. Ethnic groups speaking Na-Dene languages have
been suggested as possible candidates, but that has been disputed
recently based on genomic data. The second wave of migration may have
transmitted Siberian languages into America, giving rise to the putative
Dene-Yeniseian language family. As ancient Paleo-Eskimos represent the
only native group bearing substantial Siberian ancestry in America,
finding a Siberian signal in Na-Dene would suggest that they are
descended from the second wave. We have analyzed Beringian and Siberian
ancestry in Native Americans, relying on rare SNP allele and autosomal
haplotype sharing patterns. Using the Rarecoal approach, we have also
modelled a population tree with admixture events. Our results speak in
favor of the Paleo-Eskimo ancestry in Na-Dene.