Abstract
The SureID® PathFinder Plus is a new 6-dye, 41-plex Y-STR system that includes the 17 loci from the Yfiler® kit (DYS19, DYS385a/b, DYS389I/II, DYS390, DYS391, DYS392, DYS393, DYS437, DYS438, DYS439, DYS448, DYS456, DYS458, DYS635, and Y-GATA-H4) plus 14 rapidly mutating Y-STR loci (DYS449, DYS481, DYS518, DYS527a/b, DYS533, DYS549, DYS570, DYS576, DYS627, DYF387S1a/b, and DYF404S1), and 10 low-medium mutation loci (DYS388, DYS444, DYS447, DYS460, DYS522, DYS557, DYS593, DYS596, DYS643, and DYS645). The inclusion of the 14 rapidly mutating Y-STR loci improves the discrimination of related individuals. Conversely, the 10 low-medium mutation loci are suitable not only for familial searching but also for providing a higher refinement in the construction of Y chromosome phylogenetic relationships among lineages. The 41-plex Y-STR system is designed for direct amplification of reference samples, such as blood samples on an FTA® Card, gauze, tissue, or cotton substrates as well as hair root or buccal samples on swabs. We performed developmental validation work including accuracy, stability, stutter precision, species specificity, sensitivity, PCR inhibitors, reproducibility, parallel testing of the system, and suitability for use on DNA mixtures. In addition, mutations of the loci were analyzed by 754 DNA-confirmed father–son pairs. The results demonstrate that this kit, developed in-house, is time-efficient, accurate, reliable, and highly informative for forensic database, familial searching, and distinguishing related males.
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Acknowledgments
We thank all of the participants in this study. The authors would like to gratefully acknowledge the following laboratories for beta-testing of the SureID® PathFinder Plus Kit: Medical Research Center of Shaoxing University, Forensic Center of Shaoxing University, Human DNA Diagnostics Laboratory of Ningbo Health Gene Technologies Co. Ltd., and Forensic DNA laboratory of Shaoxing Municipal Public Security Bureau.
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Informed consent was obtained from all participating subjects, and this work was approved by the Ethics Committee of the Medical College, Shaoxing University.
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Fan, G., Pan, L., Tang, P. et al. Technical note: developmental validation of a novel 41-plex Y-STR system for the direct amplification of reference samples. Int J Legal Med 135, 409–419 (2021). https://doi.org/10.1007/s00414-020-02326-9
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DOI: https://doi.org/10.1007/s00414-020-02326-9