Frequency distribution of D1S80 alleles in the northern Thai population analyzed by amplified fragment length polymorphism technique.

A population study on the D1S80 locus in 100 northern Thais was performed using polymerase chain reaction (PCR) and high resolution polyacrylamide gel electrophoresis. Sixteen alleles and 39 genotypes were observed with a heterozygosity of 82%. In contrast to other studies, the allele with 31 repeat units was found to be the most common, followed by alleles 24 and 18. Alleles with more than 41 repeat units were also observed in this study. When applying statistical tests for Hardy-Weinberg equilibrium, no significant deviations were found in this Thai population. The average power of exclusion (in no-parent and one-parent cases) and the discriminating power (DP) was calculated to be 0.52, 0.69 and 0.94, respectively.