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  • Title: Sixteen X-chromosomal STRs in two octaplex PCRs in Japanese population and development of 15-locus multiplex PCR system.
    Author: Nakamura Y, Minaguchi K.
    Journal: Int J Legal Med; 2010 Sep; 124(5):405-14. PubMed ID: 20512346.
    Abstract:
    X-chromosome short tandem repeat (STR) polymorphisms are a useful tool in the fields of human population genetics and personal identification and are indispensable in investigating complex kinship or deficiency cases in circumstances where information on mtDNA or Y-chromosome polymorphisms is unavailable. The purpose of this study was to construct a multiplex polymerase chain reaction (PCR) system capable of analyzing a large number of X-STR loci and establish a 16-X-STR database in the Japanese population We developed two octaplex X-STR systems, one including the DXS7424, GATA172D05, HPRTB, DXS8377, GATA31E08, DXS9895, DXS7423, and DXS981 loci and the other the DXS6803, DXS6789, DXS6800, DXS6809, DXS7133, DXS7132, DXS101, and DXS6807 loci, and conducted a population study in 512 Japanese individuals comprising 339 men and 173 women. A 16-locus multiplex system produced unwanted PCR products due to mixture of the DXS9895 primer with the primers of two other loci. However, a 15-locus multiplex system exclusive of the DXS9895 locus did not. The 15-locus multiplex system amplified the largest number of loci among the X-STR multiplex systems used and afforded a power of discrimination of 0.99999999999997 in women and 0.999999997 in men.
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