A multiplex panel of short-amplicon insertion-deletion DNA polymorphisms for forensic analysis.

Area of Science:

• Genetics
• Forensic Science

Background:

• A previous panel of 40 insertion-deletion (INDEL) human DNA polymorphisms demonstrated broad coverage of global genetic diversity.
• This panel exhibited low matching probabilities in global and Brazilian populations.

Purpose of the Study:

• To optimize the existing INDEL DNA polymorphism panel for degraded DNA samples commonly found in forensic analysis.
• To develop a new, highly efficient multiplex panel for forensic applications.

Main Methods:

• Significantly reduced amplicon sizes of insertion-deletion (INDEL) markers.
• Developed a new multiplex panel with amplicon sizes ranging from 50 to 153 base pairs (mean 93 bp).
• Utilized polymerase chain reaction for amplification in two multiplex reactions, followed by electrophoretic separation and identification using an ABI3130 DNA analyzer.

Main Results:

• The new multiplex panel successfully amplified degraded DNA samples.
• Validated results confirmed the panel's efficacy for forensic analysis.
• The optimized panel maintains high discriminatory power for human identification.

Conclusions:

• The developed multiplex INDEL panel is suitable for forensic applications, particularly with challenging degraded DNA samples.
• This optimized panel enhances the analysis of human genetic diversity in forensic contexts.
• The validated panel provides a robust tool for individual identification.