A Genetic Perspective on the Origin and Migration of the Samoyedic-Speaking Populations from Siberia
Abstract To study the affinities of Siberian populations and to address hypotheses on the origin of the Samoyed peoples, 567,096 autosomal genome-wide single-nucleotide polymorphisms (SNPs) and 147 Y-chromosome data from 15 Siberian and 12 reference populations were examined. For several analyses, w...
| Main Authors: | , , |
|---|---|
| Format: | Book Part |
| Language: | English |
| Published: |
Oxford University PressNew York
2021
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1093/oso/9780190945961.003.0008 https://academic.oup.com/book/chapter-pdf/57910981/oso-9780190945961-chapter-8.pdf |
| Summary: | Abstract To study the affinities of Siberian populations and to address hypotheses on the origin of the Samoyed peoples, 567,096 autosomal genome-wide single-nucleotide polymorphisms (SNPs) and 147 Y-chromosome data from 15 Siberian and 12 reference populations were examined. For several analyses, we used the intersection of our data with publicly available ancient Siberian samples. To examine genetic relatedness among populations, PCA, FST, TreeMix, and ADMIXTURE analyses were applied. The distribution of runs of homozygosity (ROH) and identical by descent (IBD) sharing within populations were studied to explore the potential effect of demography and evolutionary processes on the population structure. Analyses of autosomal and Y-chromosome data revealed high differentiation of the Siberian groups. A substantial level of variation among Samoyedic-speaking populations alone did not differ significantly from the whole of Siberia. Several populations (i.e., Nganasans, Evenks, Yukagirs, and Koryaks) did not appear to have experienced admixture with other Siberian populations (i.e., producing only positive f3), while for the other tested populations the composition of mixing sources always included Nganasans or Evenks. The Nganasans from the Taymyr Peninsula demonstrated the greatest level of shared shorter ROH and IBD with nearly all other Siberian populations. Autosomal SNP and Y-chromosome data demonstrate that Samoyedic populations differ significantly in their genetic composition. Genetic relationship is observed only between Forest and Tundra Nentsi. Selkups are affiliated with the Kets from the Yenisey River, while the Nganasans are separated from their linguistic neighbors, showing closer affinities with the Evenks and Yukagirs. |
|---|