Polymorphism of three rural populations of the Tuva Republic was examined using a set of five autosomal Aluinsertions at the ACE, PLAT, PV92, APOA1,and F13Bloci. The allele frequency distribution patterns revealed in Tuvinians were typical to Mongoloid populations of Asia and were characterized by relatively high frequency of the Alu-repeat insertion at the PV92and F13Bloci along with relatively low insertion frequency at the APOA1locus. With respect to the test systems used, Tuvinian populations examined displayed high levels of genetic diversity. The mean expected heterozygosity values in the populations of Kungurtug, Toora-Khem, and Teeli were 0.433, 0.407, and 0.437, respectively. The level of genetic diversity in the pooled Tuvinian sample was 0.432. The coefficient of genetic differentiation in the three populations studied was 1.4% pointing to relatively low level of genetic subdivision of the indigenous Tuvinian populations. However, estimates of genetic differentiation of the Tuvinian gene pool made by use of the Alu-repeat system were higher compared to those performed using classical protein systems, mtDNA, or Y-chromosomal haplotypes. Even though Tuvinian populations were characterized by common gene pool, some features specific to Western Tuvinian population could be distinguished. These features could be associated with higher contribution of the Caucasian component to the gene pool of this population. Phylogenetic analysis demonstrated close genetic relationships between the Tuvinian and Altaic ethnic populations.
Russian Journal of Genetics – Springer Journals
Published: Oct 16, 2004
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