title: Evaluation of tetranucleotide repeat locus D7S809 (wg1g9) in the Japanese population.
abstract: The tetrameric short tandem repeat (STR) locus (D7S809) has been evaluated in the Japanese population. In order to detect the alleles, PCR was carried out using primers, one of which was end labelled with 32P, and PCR products were separated by electrophoresis on a denaturing polyacrylamide gel. Using this method, accurate genotypes could be determined from as little as 0.5 ng of genomic DNA. Thirteen different alleles were identified on 256 chromosomes tested. All alleles differed in size by one (4 bp) repeat unit, and no "interalleles' were found. The estimated heterozygosity and the polymorphism information content (PIC) were 0.86 and 0.83, respectively. We observed 42 of the 91 possible different genotypes. The power of discrimination (PD) was 0.96, and no significant deviations from the Hardy-Weinberg equilibrium were found. We retyped all apparently homozygous samples using an alternative pair of flanking primers in order to confirm homozygosity. We also demonstrated a typing result involving sexual assault. D7S809 appears to be a very useful STR locus for forensic practice in Japanese.
authors.affiliation: Department of Legal Medicine, Nagoya University School of Medicine, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Tamaki
authors.forename: X L
authors.initials: XL
authors.lastname: Huang
authors.forename: H
authors.initials: H
authors.lastname: Nozawa
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.forename: R
authors.initials: R
authors.lastname: Uchihi
authors.forename: Y
authors.initials: Y
authors.lastname: Katsumata
authors.forename: J A
authors.initials: JA
authors.lastname: Armour
mesh_terms: D001483:Base Sequence; D004247:DNA / Q000235:genetics*; D016172:DNA Fingerprinting / Q000379:methods*; D016002:Discriminant Analysis; D004591:Electrophoresis, Polyacrylamide Gel; D006580:Genetic Carrier Screening; D015894:Genome, Human; D005838:Genotype; D006720:Homozygote; D006801:Humans; D007564:Japan; D018895:Microsatellite Repeats / Q000235:genetics*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction / Q000379:methods; D011110:Polymorphism, Genetic; D011902:Rape / Q000175:diagnosis; D015203:Reproducibility of Results
chemical_list: D004247:DNA