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Evaluation of Library Preparation Workflows and Applications to Different Sample Types Using the PowerSeq® 46GY

Kyleen Elwick1, Patrick Rydzak1, James M Robertson2

  • 1Visiting Scientist Program, Research & Support Unit, Laboratory Division, Federal Bureau of Investigation, 2501 Investigation Parkway, Quantico, VA 22135, USA.

Genes
|May 27, 2023
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Summary

The PowerSeq 46GY System, with its manufacturer

Keywords:
PowerSeq® 46GY SystemSTRslibrarieslibrary preparationmassively parallel sequencing (MPS)next-generation sequencing (NGS)purification beads

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Area of Science:

  • Forensic Science
  • Genetics
  • Molecular Biology

Background:

  • Forensic DNA analysis relies on accurate and efficient methods for DNA profiling.
  • Optimizing library preparation and quantification is crucial for maximizing data quality in next-generation sequencing (NGS) based forensic applications.
  • The PowerSeq 46GY System is a prototype NGS platform for forensic DNA analysis.

Purpose of the Study:

  • To evaluate the prototype PowerSeq 46GY System for forensic DNA profiling.
  • To assess the impact of protocol modifications on read coverage and sample analysis.
  • To compare different library preparation kits and quantification methods.

Main Methods:

  • Evaluation of the PowerSeq 46GY System using donor DNA and casework samples.
  • Preparation of buccal and casework-type libraries using TruSeq DNA PCR-Free HT and KAPA HyperPrep kits.
  • Comparison of PowerSeq Quant MS System and KAPA Library Quantification Kit, alongside a KAPA size-adjustment workbook.
  • Sequencing on the MiSeq FGx platform and data analysis with STRait Razor.

Main Results:

  • All evaluated quantification methods overestimated library concentration; PowerSeq Quant MS System showed the highest accuracy.
  • The TruSeq library kit yielded superior results, including higher coverage and fewer allelic dropouts, compared to the KAPA kit.
  • Bone and hair samples showed complete profile recovery, with bone samples exhibiting higher average coverage.

Conclusions:

  • The manufacturer's protocol for the PowerSeq 46GY System provided the best overall results compared to alternative library preparation methods.
  • Optimized library preparation and accurate quantification are key to successful forensic DNA profiling using NGS technologies.
  • The PowerSeq 46GY System demonstrates potential for reliable forensic DNA analysis, even with challenging sample types.