Developmental validation of the HomyGene19+14Y System

Area of Science:

• Forensic Genetics
• Molecular Biology
• Population Genetics

Background:

• Short tandem repeat (STR) analysis is crucial in forensic science for human identification.
• Simultaneous typing of multiple STR loci enhances discrimination power and efficiency.
• Y-chromosome STR (Y-STR) analysis is valuable for paternal lineage tracing and male suspect identification.

Purpose of the Study:

• To validate the HomyGene19+14Y (HG19+14Y) System, a multiplex PCR kit for forensic DNA typing.
• To assess the kit's performance according to Scientific Working Group on DNA Analysis Methods (SWGDAM) guidelines.
• To evaluate the system's utility for various forensic applications including kinship and mixture analysis.

Main Methods:

• Developmental validation of the HG19+14Y multiplex PCR kit.
• Testing for sensitivity, specificity, DNA mixtures, stability, precision, stutter, and reproducibility.
• Population analysis of 18 autosomal STR loci in 528 individuals and 14 Y-STR loci in 452 unrelated males.

Main Results:

• The HG19+14Y System successfully typed 18 autosomal STR loci and 14 Y-STR loci, including amelogenin.
• Validation demonstrated robustness, reliability, and high polymorphism for the kit.
• The combined match probability (CMP) was calculated as 2.39 × 10^-29, indicating high discriminatory power.

Conclusions:

• The HG19+14Y System is a robust, reliable, and highly informative forensic DNA typing kit.
• The system meets SWGDAM validation requirements for forensic applications.
• The kit's high polymorphism and efficiency support its use in single-source searches, kinship analysis, and international data sharing.