Short tandem repeat analysis in Japanese population

✍ Scribed by Masaki Hashiyada

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 50 KB
• Volume: 21
• Category: Article
• ISSN: 0173-0835
• DOI: 10.1002/(sici)1522-2683(20000101)21:2<347::aid-elps347>3.0.co;2-9

✦ Synopsis

Short tandem repeats (STRs), known as microsatellites, are one of the most informative genetic markers for characterizing biological materials. Because of the relatively small size of STR alleles (generally 100±350 nucleotides), amplification by polymerase chain reaction (PCR) is relatively easy, affording a high sensitivity of detection. In addition, STR loci can be amplified simultaneously in a multiplex PCR. Thus, substantial information can be obtained in a single analysis with the benefits of using less template DNA, reducing labor, and reducing the contamination. We investigated 14 STR loci in a Japanese population living in Sendai by three multiplex PCR kits, GenePrint TM Pow-erPlex TM 1.1 and 2.2. Fluorescent STR System (Promega, Madison, WI, USA) and AmpFI STR Profiler TM (Perkin-Elmer, Norwalk, CT, USA). Genomic DNA was extracted using sodium dodecyl sulfate (SDS) proteinase K or Chelex 100 treatment followed by the phenol/chloroform extraction. PCR was performed according to the manufacturer©s protocols. Electrophoresis was carried out on an ABI 377 sequencer and the alleles were determined by GeneScan TM 2.0.2 software (Perkin-Elmer). In 14 STRs loci, statistical parameters indicated a relatively high rate, and no significant deviation from Hardy-Weinberg equilibrium was detected. We apply this STR system to paternity testing and forensic casework, e.g., personal identification in rape cases. This system is an effective tool in the forensic sciences to obtain information on individual identification.