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Six bovine microsatellite loci were analyzed to characterize the genetic structure of Korean cattle (Hanwoo) plus three populations of Yanbian yellow cattle, Japanese black cattle, and Holstein. Allele diversity, observed heterozygosities, expected heterozygosities, polymorphic information contents, gene differentiation (F_(ST)), indirect estimates of gene flow (Nm: migrants per generation), and Nei´s DA distance were calculated. The highest genetic diversity was exhibited in Yanbian yellow cattle (Het_E = 0.732) and the lowest in Japanese black cattle (Het_E = 0.450). Korean cattle showed relatively high genetic diversity (Het_E = 0.690). The genetic differentiation values between populations, as measured by pairwise F_ST, Nm, and Nei´s genetic distance, indicated Korean cattle showed a close relationship with Yanbian yellow cattle. Taken together, it is concluded that there is extensive gene flow between Korean cattle and Yanbian yellow cattle.
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