[Restriction-deletion polymorphism of the mitochondrial DNA V-region in populations from the Volga-Ural region].

: Data on the occurrence of deletion and the AvaII polymorphic site in the V region of mitochondrial DNA in the populations of the Volga-Ural region, including four ethnic groups of Bashkirs, Tartars, Chuvashs, Maris, Udmurts, Mordovians, and Komis are presented. The frequency of the 9-bp deletion ranged from 7.7% to 2.3% in Bashkirs and was 6.2% in Maris, 2.9% in Udmurts, 2.0% in Komis, and 1.8% in Tartars. This deletion was not detected in Bashkirs from the Abzelilovskii region, Chuvashs, or Mordovians. Insertion was not found in any of the populations studied. A total of four mitotypes formed by the combination of two polymorphic markers of the V region of mitochondrial DNA were detected, and gene diversities against different markers and mitotypes were calculated. The data were compared with that on other ethnic groups and populations.