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The Dagestan Mountain (DM) cattle breed was established to provide cheese and milk products to mountain dwellers in the specific conditions of the Republic of Dagestan in Southern Russia. Only 650 head of DM cattle were registered in 2020, and their "breed purity" is questionable. We aimed to assess the genetic diversity and population structure of modern DM cattle using short tandem repeat (STR) markers. The sample included 150 animals collected from private owners in Dagestan during a scientific expedition (n = 32) and provided by a gene pool farm (n = 118). An additional 166 samples from other cattle breeds distributed in the breeding zone of DM cattle were used as the comparison groups. The genotypes for the 11 STR loci recommended by ISAG were obtained using a genetic analyzer. We identified a high level of genetic diversity as revealed by allelic richness calculations (Ar = 6.82 vs. 4.38–5.82 in other cattle breeds) and observed heterozygosity indices (uHe = 0.76 vs. 0.65–0.72). Based on the STRUCTURE results, animals with low levels of admixture with other breeds were found within the DM cattle, which can be considered as candidates for use in germplasm conservation programs. [ABSTRACT FROM AUTHOR]

Cheap pasture fodder and a long grazing season are favorable for cattle breeding in the Dagestan Republic of Russia. However, specific natural and geographical conditions, including mountain terrain, hypoxia, and high humidity slow down the intensification of cattle breeding in this region. Thus, the maintenance of genetic diversity of local cattle breeds, which fits well into specific environments, is of special importance for mountain ethnic communities. Dagestan Mountain cattle have valuable biological traits, including strong hooves, stamina, and adaptability to extreme mountain conditions. This sample included 32 individuals of Dagestan Mountain cattle collected from private owners in the mountain villages of Dagestan during a scientific expedition. We observed a high level of genetic diversity in Dagestan Mountain cattle, as revealed by calculations of the mean number of alleles per locus (6.82 compared to 4.79–5.82 in other breeds) and observed heterozygosity indices (Ho = 0.73, which was higher compared to the other breeds (Ho = 0.69) excluding Simmentals and Brown Swiss (Ho = 0.74). Based on STRUCTURE results, the individuals with a low level of admixture with other breeds were found within Dagestan Mountain cattle, which can be considered as candidates for using conservation programs in germplasms. [ABSTRACT FROM AUTHOR]