Abstract
ABSTRACT Massively parallel sequencing (MPS) enables concurrent analysis of multiple single nucleotide polymorphisms (SNPs) and detection of alleles from minor contributors to extremely imbalanced DNA mixtures. To interpret the complex MPS data obtained from DNA mixtures, EuroForMix, linear regression, and neural network models were employed. Data of 960 autosomal SNPs sequenced through MPS of 10 single-source DNA samples, 26 nondegraded DNA mixtures from nonrelative (mixture ratio 1:29–1:99), 16 nondegraded DNA mixtures from relatives (1:29–1:99), 8 degraded DNA mixtures from nonrelatives (1:29–1:99), and 16 degraded DNA mixtures of relatives (1:29–1:99) were analysed. In total, 89.4% (59/66), 93.9% (62/66), and 93.9% (62/66) of the minor contributors to DNA mixtures could be correctly inferred using EuroForMix, linear regression, and a neural network, respectively. In conclusion, the linear regression and neural network models outperformed EuroForMix in determining the minor contributor to DNA mixtures from MPS data.
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