[Objective] The research aimed to provide the theoretical basis for the variety resource protection and crossing utilization of mutton sheep.[Method] The genetic diversity among 3 foreign sheep varieties and 2 Chinese local sheep varieties was analyzed by using 7 microsatellite markers.Their intraspecific genetic variation and the interspecific genetic relationship were studied.[Result] 105 alleles were detected in 5 sheep varieties and more than 5 alleles could be detected in each microsatellite locus of e...