[Genotype validation of 12 STR loci by sequencing method]

Area of Science:

• Forensic Genetics
• Molecular Biology
• Human Identification

Background:

• Short tandem repeat (STR) analysis is a cornerstone of forensic genetics and human identification.
• Accurate genotyping is crucial for reliable DNA profiling and interpretation.
• Validation of new methodologies ensures the robustness of genetic analysis.

Purpose of the Study:

• To validate the accuracy and sensitivity of a sequencing-based method for genotyping 12 specific STR loci.
• To establish a reliable method for confirming STR genotyping results.

Main Methods:

• Designed specific PCR primers targeting 12 STR loci (CSF1PO, FGA, TH01, TPOX, VWA, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, and D21S11).
• Sequenced PCR products from control DNA (9947A) and STR mutation samples.
• Compared sequencing results with existing genotyping data.

Main Results:

• Sequencing results for the control DNA (9947A) precisely matched its known genotyping profile.
• Sequencing analysis of STR mutation samples yielded results consistent with their established genotypes.
• Demonstrated concordance between sequencing-derived genotypes and prior genotyping data.

Conclusions:

• The developed sequencing method is accurate and sensitive for STR locus analysis.
• This method provides a reliable means to validate STR genotyping results.
• The technique holds potential for routine application in forensic and genetic laboratories.