This study used Bayesian analogs in regression analysis of stutter in DNA mixtures.
Probabilistic genotyping methods use a hierarchical probability model in deconvolution of DNA mixtures. The parameters of the model, including the stutter which are required to calculate the expected values of peak heights, are estimated in the validation process. Linear modeling of stutter, as a common artifact in DNA genotyping, has been reported previously. The typically right-skewed error distribution and non-negativeness of stutter to its allele peak heights ratios make generalized linear models preferable, especially Bayesian analogs, which enable even more flexibility. The current project shows how such models can be fitted and applied with the aid of Markov chain Monte Carlo methods. (publisher abstract modified)
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