Genetic sampling for the Russia_Tagar set comprises eight individuals dated to ~1000–800 BCE. With only eight samples, conclusions must be framed as preliminary. Y-chromosome lineages are recorded as R in three individuals and Q in one. The R signal is notable because broad R lineages are frequent across Eurasian steppe populations and are often associated with male-mediated steppe expansions in other regions; however, the available data do not resolve subclades (R1a vs R1b), so precise historical inferences are limited. The presence of Y Q points to a contribution from northeastern Eurasian or Siberian paternal lineages.
Maternal haplogroups show a mixed palette: U (2) and H (1) are common west-Eurasian lineages, while N (2), F (1), and A (1) are more typical of eastern Eurasian or Siberian maternal ancestries. This mixture suggests that Tagar communities were genetically heterogeneous, reflecting contacts across an east–west gradient. Such a pattern is compatible with scenarios of admixture between incoming steppe-associated male lineages and local or eastern maternal pools, but with eight samples we cannot robustly test sex-biased admixture or demographic models. Autosomal genome-wide data, dense sampling across sites, and direct radiocarbon dates are needed to clarify timing, magnitude and directionality of gene flow.