title: Analysis of short tandem repeat (STR) polymorphisms by the powerplex 16 system and capillary electrophoresis: application to forensic practice.
abstract: Allele and genotype frequencies for 15 short tandem repeat (STR) polymorphisms--D3S1358, TH01, D21S11, D18S51, Penta E, D5S818, D13S317, D7S820, D16S539, CSF1PO, Penta D, vWA, D8S1179, TPOX and FGA--in a Japanese population were estimated. No deviations of the observed allele frequency from Hardy-Weinberg equilibrium expectations were found for any of the systems studied. Between 2 new pentanucleotide STR loci, Penta E and Penta D, for which there is only limited data regarding the allelic distribution in Japanese, the Penta E locus was found to be highly polymorphic and exhibited a tri- or tetra-modal distribution pattern having allelic peaks with 5, 11, 15 and 20 repeats. The distribution was significantly different from that of the other ethnic groups. Statistical parameters of forensic importance, the power of discrimination (PD), observed and expected heterozygosity values (H), polymorphism information content (PIC), power of discrimination (PD), matching probability (pM), power of exclusion (PE), and typical paternity index (PI), were calculated for the loci. These parameters indicated the usefulness of the loci in forensic personal identification and paternity testing among Japanese. The systems Penta E, FGA, D18S51 and D8S1179 were the most informative. This method was successfully applied to forensic personal identification and paternity testing among Japanese, thereby confirming its efficacy for forensic practice.
authors.affiliation: Department of Legal Medicine, Okayama University Graduate School of Medicine and Dentistry, Okayama 700-8558, Japan.
authors.forename: Osamu
authors.initials: O
authors.lastname: Okamoto
authors.forename: Yuji
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Sachiyo
authors.initials: S
authors.lastname: Inagaki
authors.forename: Kei
authors.initials: K
authors.lastname: Yoshitome
authors.forename: Takaki
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Kiyomi
authors.initials: K
authors.lastname: Imabayashi
authors.forename: Satoru
authors.initials: S
authors.lastname: Miyaishi
authors.forename: Hideo
authors.initials: H
authors.lastname: Ishizu
mesh_terms: D000328:Adult; D002648:Child; D019075:Electrophoresis, Capillary; D005260:Female; D005554:Forensic Medicine / Q000379:methods*; D005787:Gene Frequency; D005828:Genetics, Population; D006801:Humans; D007564:Japan; D008297:Male; D010334:Paternity; D016133:Polymerase Chain Reaction / Q000379:methods; D011110:Polymorphism, Genetic; D011446:Prospective Studies; D020080:Tandem Repeat Sequences