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Updated: May 1, 2026

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Published on: February 21, 2011
Modelling PowerPlex® Y stutter and artefacts
Jo-Anne Bright1, James M Curran2, John S Buckleton3
1ESR Ltd, Private Bag 92021, Auckland 1142, New Zealand; Department of Statistics, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
Abstract:
We have investigated the suitability of models used to predict expected stutter ratios and their variance developed for autosomal STR markers for application to Y STR markers. Models for expected back stutter, double back stutter, and forward stutter ratios for all loci in the PowerPlex(®) Y multiplex and the heights of stutter-like artefacts at DYS19 and DYS385 are proposed. The longest uninterrupted stretch of repeats within an allele (LUS), marker and parent allele height was investigated as explanatory variables for stutter ratio and artefact height. The models are intended to be used within an expert system employing a continuous method of DNA interpretation.
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