Study on Genetic Diversity of Some Cattle Breeds

<正> Four microsatellites IDG VA-11, IDG VA-27, IDG VA-44 and IDG VA-46 were used to analyze genetic diversity of five cattle breeds. The average gene diversity of the four loci was 0.57, of which IDG VA-11 was 0.66. Genetic diversity of five cattle breeds was 0. 57, Nanyang was the highest 0. 66, Yanbian and Korea cattle were 0.51 and 0. 53, respectively. The fact that the observed diversity was lower than expected in Simmental and Piemontese crossbred showed existing selection and inbreeding impacts. The gene flow between Yanbian and Korea cattle, and that between Simmental and Piemontese crossbred were as high as 23. 79 and 7.15 for each pairs of them, which showed their closer origins.