Evaluation of the InnoTyper® 21 genotyping kit in multi-ethnic populations

Peter Gustav Ristow, Nicole Barnes, Gina Pineda Murphy, Hiromi Brown, Kevin Wesley Cloete, Maria Eugenia D'Amato*

*Corresponding author af dette arbejde

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    7 Citationer (Scopus)

    Abstract

    We report the findings of the evaluation of the InnoTyper® 21 genotyping kit for the use of human identification (HID) and paternity testing in South Africa. This novel forensic kit evaluates 20 retrotransposable elements (AC4027, MLS26, ALU79712, NBC216, NBC106, RG148, NBC13, AC2265, MLS09, AC1141, TARBP, AC2305, HS4.69, NBC51, ACA1766, NBC120, NBC10, NBC102, SB19.12 and NBC148) and the Amelogenin locus for sex determination. The evaluation of the genotyping performance showed no significant spectral pull-up for peak heights between 100 and 30,000 RFUs. All loci presented biallelic patterns except the triallelic RG148 locus resulting from a variant insertion allele, named RG148I-1, observed exclusively in the Bantu. The InnoTyper® 21 kit was found to be highly discriminatory between the 507 unrelated individuals of the Afrikaaner, Asian Indian, Coloured, amaXhosa and amaZulu groups. The HID parameters: the CPD ranged between 0.99999987 and 0.9999999845, and the CMP between 1.0335 × 10−7 and 1.5506 × 10−8. The paternity parameters: the CPI ranged between 0.0202 and 0.3177, and the CPE between 0.9161 and 0.9749. There were no significant signs of deviations from HWE or linkage disequilibrium (LD) after applying a Bonferroni correction. This kit also showed minor levels of population structure which could differentiate between the African and non-African population groups. Finally, in challenging casework with severely degraded biological material, the InnoTyper® 21 genotyping kit was compatible with GlobalFiler® and Investigator DIPplex® to increase the HID parameters.

    OriginalsprogEngelsk
    TidsskriftForensic Science International: Genetics
    Vol/bind30
    Sider (fra-til)43-50
    Antal sider8
    ISSN1872-4973
    DOI
    StatusUdgivet - sep. 2017

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