RESUMO
<p><b>OBJECTIVE</b>To investigate genetic polymorphisms of 10 short tandem repeats loci (D6S1043, D7S3048, D9S925, D10S2325, D11S2368, D14S608, D15S659, D17S1290, D20S470 and GATA198B05) in Tibetans from Lhasa, China.</p><p><b>METHODS</b>Following extraction, DNA from 208 unrelated Tibetan individuals was amplified with a self-designed multiplex PCR system. The amplified fragments were separated by electrophoresis on an ABI 3130 Genetic Analyzer and analyzed with GeneMapper®3.2 software.</p><p><b>RESULTS</b>The distributions of genotype for the 10 STR loci in the population were in accordance with Hardy-Weinberg equilibrium. The polymorphism information component for the 10 loci was 0.750-0.860, the degree of heterozygosity was 0.726-0.865, the discrimination power was 0.919-0.968, and the probability of exclusion was 0.470-0.725. The combined probability of exclusion and combined discrimination power was 0.9998 and 0.999 999 999 997, respectively.</p><p><b>CONCLUSION</b>Above STR loci have high probability of exclusion and discrimination power, which can be used as candidate markers for population genetic research and forensic practice for Tibetans from Lhasa, China.</p>