Y-Chromosomal insights into the paternal genealogy of the Kerey tribe have called into question their descent from the Stepfather of Genghis Khan.

The Kerey is one of the prominent Kazakh tribes and has long been a subject of ethnographic scrutiny, with a lack of consensus on its origin and traditional genealogy. Their historical significance, intertwined with the emergence of the empire established by Genghis Khan, necessitates a comprehensive understanding of their genetic history. This study focuses on unraveling the genetic heritage of the Kerey tribe. We conducted a comprehensive analysis of Y-chromosome data from genetic genealogy as citizen science and genetic screening of 23 Y-STRs and 37 Y-SNPs on 207 males from the Kerey tribe within academic science. Our results reveal two prevalent phylogenetic lineages within the C2a1a3a-F3796 haplogroup, also known as the C2*-Star Cluster (C2*-ST), which is one of the founding paternal lineages of the ancient Niru'un clan of the Mongols: C2-FT411734 and C2-FT224144, corresponding to the Abak and Ashamaily clans. While indicating a common male ancestry for them, our findings challenge the notion that they are full siblings. Additionally, genetic diversity analysis of the Y-chromosomes in the Kerey tribe and Kazakhs confirms their kinship with the Uissun tribe but refutes the claim of the Abak clan's progenitor originating from this tribe. Furthermore, genetic evidence fails to support popular historical and ethnographic hypotheses regarding the Kerey tribe's kinship with the Uak, Sirgeli, Adai, Törtkara, Karakerey, and Kereyit Kazakh tribes. The absence of a genetic paternal connection with the Kereyt tribe raises doubts about the genealogical link between the Kerey tribe and the stepfather of Genghis Khan.

Kazak mitochondrial genomes provide insights into the human population history of Central Eurasia.

As a historical nomadic group in Central Asia, Kazaks have mainly inhabited the steppe zone from the Altay Mountains in the East to the Caspian Sea in the West. Fine scale characterization of the genetic profile and population structure of Kazaks would be invaluable for understanding their population history and modeling prehistoric human expansions across the Eurasian steppes. With this mind, we characterized the maternal lineages of 200 Kazaks from Jetisuu at mitochondrial genome level. Our results reveal that Jetisuu Kazaks have unique mtDNA haplotypes including those belonging to the basal branches of both West Eurasian (R0, H, HV) and East Eurasian (A, B, C, D) lineages. The great diversity observed in their maternal lineages may reflect pivotal geographic location of Kazaks in Eurasia and implies a complex history for this population. Comparative analyses of mitochondrial genomes of human populations in Central Eurasia reveal a common maternal genetic ancestry for Turko-Mongolian speakers and their expansion being responsible for the presence of East Eurasian maternal lineages in Central Eurasia. Our analyses further indicate maternal genetic affinity between the Sherpas from the Tibetan Plateau with the Turko-Mongolian speakers.