Allele frequencies and genetic data of 16 highly polymorphic loci in Koreans

A Simple Method of VNTR D1S80 Locus Allelic Ladder Construction for Capillary Electrophoresis-based Genotyping

VNTR D1S80 locus genotyping has been largely replaced in forensics by STR. As the statute of limitations on murder cases was abolished in the Republic of Korea in July 2015, the demand for re-analysis of DNA from unresolved murder cases has increased. The National Forensic Service includes several recorded D1S80 genotypes as crucial clues. Here, we re-established the D1S80 analysis system using capillary electrophoresis and confirmed the reproducibility of the system by comparison with the genotypes of eight DNA samples that had been analyzed using PAGE in 2006. In addition, we created an allelic ladder via new methodology using flanking region sequences. A single DNA sample (K562) and seven primers were used for the new ladder, which contains 12 alleles. Although artificial owing to the use of the flanking region rather than repeat unit reduction, the method is rapid and simple, and could be applicable in any laboratory.

Population data on 10 non-CODIS STR loci in Japanese population using a newly developed multiplex PCR system

This paper describes a newly devised autosomal short tandem repeat (STR) multiplex polymerase chain reaction (PCR) systems for 10 loci (D1S1656, D2S1353, D8S1132, D12S1090, D14S608, D18S535, D19S253, D20S480, D21S226, and D22S689) unlinked to the core STR loci (non-CODIS loci). Of 252 samples taken from the Japanese population, PCR products ranged in length from 107 bp to 319 bp. No significant deviations from Hardy-Weinberg equilibrium were observed at any of the 10 loci. The accumulated power of discrimination and power of exclusion for the 10 loci were 0.999999999998 and 0.99991, respectively. We conclude that the present multiplex system for the 10 non-CODIS loci represents a powerful tool for forensic applications.