A novel multiplex assay for simultaneously analysing 13 rapidly mutating Y-STRs.

Area of Science:

• Forensic genetics
• Molecular biology
• Human population genetics

Background:

• Y-chromosomal short tandem repeat (Y-STR) markers are crucial for human identity testing.
• Rapidly mutating Y-STR (RM Y-STR) markers offer enhanced discriminatory power for male lineage analysis.
• Existing multiplex assays may not encompass all recently identified RM Y-STRs.

Purpose of the Study:

• To develop and optimize a multiplex assay for simultaneous amplification of 13 RM Y-STR markers.
• To assess the sensitivity and performance of the multiplex assay for human identity testing.
• To provide a validated tool for forensic and anthropological studies.

Main Methods:

• Development of a multiplex polymerase chain reaction (PCR) assay named RM-Yplex.
• Selection of 13 recently identified RM Y-STR markers for simultaneous amplification.
• Optimization of PCR conditions for sensitivity and specificity.

Main Results:

• The RM-Yplex assay successfully amplified all 13 RM Y-STR markers simultaneously.
• Complete RM Y-STR profiles were obtained from as little as 62.5pg of male DNA.
• The assay performed effectively on male-female DNA mixtures across all tested ratios.

Conclusions:

• The RM-Yplex assay is a sensitive and effective tool for simultaneous genotyping of 13 RM Y-STRs.
• This multiplex assay significantly improves the ability to differentiate between unrelated males.
• The RM-Yplex assay is suitable for widespread application in forensic science and anthropological research.