Genetic Contribution of Indigenous Yakutian Cattle to Two Hybrid Populations, Revealed by Microsatellite Variation

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Abstract

and Kholmogory cattle breeds on a large scale from the year 1929 onwards (Dmitriev and Ernst, 1989). In this study, two hybrid populations of the Yakutian-Simmental and Yakutian-Kholmogory cattle breeds, established by continuous crossbreeding between native Yakutian cattle and East Siberian populations of Simmental and Kholmogory cattle, were analysed for their genetic admixture. In the Megino-Kangalasskyi region (61N 130E), the Yakutian-Simmental hybrid population had been formed by crossing commercial Simmental cows with local Yakutian bulls followed by inter se breeding of the first crossbred generations since 1995. In the Namsky region (62N 129E), Kholmogory cows had been crossed with Yakutian bulls, continued by backcrossing with Kholmogory bulls as the recurrent parent over generations since 1979 However, the not well-registered pedigree information and the stochastic processes in carrying out the breeding schedules made the proportional contributions of the parental cattle populations in the two hybrid populations unclear. Knowledge of the parental contributions in the hybrid populations is of great commercial, conservational, ethnographic and historical

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