Abstract
Relationships between ethnic and genetic differentiation with respect to 54 microsatellites have been analyzed in five Daghestan ethnic groups. To detect the microsatellites, human chromosomes 3, 17, and 18 were screened with a step of 10 cM (Weber/CHLC 9.0 markers) at the Mammalian Genotyping Service (National Institute of Health, United States). Comparison of the polymorphism of these loci in Daghestan populations with average worldwide data has revealed generally low heterozygosity in Daghestan populations, which is accounted for by traditional endogamous and consanguineous marriages throughout the history of these populations. The inbreeding coefficient in Daghestan ethnic groups varies from 0.005 to 0.0134 and is close to the worldwide maximum known to date. For some DNA loci, significant differences between the offsprings of consanguineous and exogamous marriages with respect to allele sizes and their variance have been found. The Daghestan ethnic populations studied differ from one another in both the frequencies of common alleles and the presence of rare alleles that are unique for each ethnic group of Daghestan and have not been found in any other population in the world.
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