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[Polymorphism of five X-STR loci in Chinese Achang ethnic group].

OBJECTIVE
To investigate the genetic polymorphism and applied value in forensic medicine of five short tandem repeats (STRs) loci(DXS7130, DXS7132, DXS7133, DXS6804 and DXS8378) on X-chromosome in Achang ethnic group.


METHODS
Allele frequency and genotype distribution of five X-STR loci among 100 unrelated individuals from Achang ethnic group were analyzed by PCR following polyacrylamide gel electrophoresis and silver staining. Hardy-Weinberg equilibrium of females was tested and forensic parameters were calculated.


RESULT
All the five STR loci were polymorphic in Achang ethnic group. Chi-square test indicated that genotype distribution of females was in accordance with Hardy-Weinberg equilibrium.


CONCLUSION
These results enrich Chinese genetic database and can be applied to individual identification, paternity testing and population genetics.