[Genetic diversity and population structure of BMY and brahman cattle revealed by six microsatellite loci].

The genetic variations and polymorphisms of six microsatellite loci were analyzed to determine the population structure and breeding progress of BMY and Brahman cattle. The range of polymorphic information content of six loci was 0.524-0.752. The unbiased expected and observed heterozygosity were similar and were 0.7376 and 0.7396, 0.6412 and 0.6537 for BMY and Brahman cattle, respectively. The expected heterozygosity was relatively high in the second generation of BMY in inter se breeding, which was congruent with the breeding progress. In addition, the value for Red Angus was 0.4609, which was lower and close to the Japanese Brown cattle (0.471), and may indicate its relative homogeneity.