Objective To explore the polymorphisms of the five Y-chromosomal short tandem repeats(STR) loci: DYS19,DYS389 II,DYS385,DYS390 and DYS391 in the Han population in Chongqing,China,so as to evaluate their value in forensic science.Methods The whole blood genomic DNAs were collected from 130 unrelated males in Chongqing.These 5 Y-STR had been amplified by PCR,and the haplotype diversity of the 5 Y-STRs were analyzed by non-denatured polyacrylamide gel electrophoresis followed by silver staining.Results DYS19,D...