SNP genotyping of forensic casework samples using the 52 SNPforID markers |
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| Institution: | 1. School of Forensic and Investigative Sciences, University of Central Lancashire, Preston, United Kingdom;2. Forensic Division, Department of Chemistry Malaysia (KIMIA), Ministry of Science and Technology and Innovation, Malaysia;1. Network of Forensic Science Institutes, Institute of Forensic Medicine, DNA Laboratory, Budapest, Hungary;2. Research Centre for Natural Sciences of the HAS, Department of Complex Systems, Budapest, Hungary;1. Flinders Centre for Nanoscale Science and Technology, Flinders University, Sturt Road, Bedford Park, Adelaide, South Australia, Australia;2. School of Biological Sciences, Flinders University, Sturt Road, Bedford Park, Adelaide, South Australia, Australia;1. Laboratorio de Genética Molecular de Cruz Vital – Cruz Roja Ecuatoriana Quito, Ecuador;2. Laboratorio GENES Ltda, Medellin, Colombia;1. Institute of Legal Medicine, Faculty of Medicine, University of Cologne, Cologne, Germany;2. IPATIMUP – Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal;3. Forensic Genetics Unit, Institute of Legal Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain;1. Forensics Genetic Service, Central Delegation, National Institute of Legal Medicine and Forensic Sciences, I.P., Coimbra, Portugal;2. Cencifor, Forensic Science Centre, Portugal;3. National Institute of Legal Medicine and Forensic Sciences, I.P., Portugal;4. Department of Biology, University of Aveiro, Portugal |
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| Abstract: | The analysis of degraded DNA is one of the biggest challenges in forensic casework. SNPs, which can be amplified using small amplicons, have previously been successfully applied to the profiling of forensic evidence that could not be analyzed using conventional STRs. Here we selected the 52 SNPforID SNP markers, with amplicons that ranged in size from 59 bp to 115 bp, and used them to profile a range of casework samples from Malaysia. DNA degradation is a common problem in Malaysia due to the high temperatures and humidity. To carry out the study we modified the 52 SNPforID markers into four 13-plex SNaPshot assays to enable easier interpretation of profiles on the ABI PRISM® 310 and 3500.Fifty-one crime samples comprising bloodstains on cloth, swabs, and a mat and 2 swabs of trace DNA from 10 crime scenes in Malaysia were profiled after DNA extraction using a phenol–chloroform method. The samples were also subjected to STR analysis using the Powerplex® 16 system (Promega), which resulted in only 17 full profiles and 9 partial profiles; using SNPs, 36 full profiles and 5 partial profiles could be generated. |
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| Keywords: | DNA profiling Degraded DNA Single nucleotide polymorphisms SNPforID |
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