[Validation and Forensic Application of a Domestic Human DNA Quantitative Detection Kit]

Area of Science:

• Forensic Science
• Molecular Biology
• Genetics

Background:

• Accurate human DNA quantification is crucial in forensic science for sample assessment.
• Real-time fluorescence quantitative PCR offers a sensitive method for DNA analysis.
• Challenges in forensic samples include low DNA quantity, degradation, inhibitors, and mixed DNA profiles.

Purpose of the Study:

• To evaluate the efficacy of a novel domestic human DNA quantification kit.
• To assess its performance in detecting total human DNA concentration.
• To determine its capability in quantifying male DNA in mixed samples, evaluating DNA degradation, and assessing inhibitor tolerance.

Main Methods:

• The domestic human DNA quantification kit was tested using samples with varying DNA concentrations, male/female ratios, inhibitor levels, and degradation degrees.
• Performance was benchmarked against a similar commercial kit.
• The kit's utility was demonstrated through application in real forensic cases.

Main Results:

• The kit accurately quantifies human DNA down to 0.00165 ng/μL and male DNA at 6.25 pg/μL in 1:15,000 male/female mixtures.
• Accurate detection persisted with high concentrations of inhibitors like humic acid (400 ng/μL) and hemin (1000 μmol/L).
• The degradation index effectively characterized sample degradation, and the kit showed successful application in forensic practice.

Conclusions:

• The domestic human DNA quantification kit is accurate and reliable for forensic applications.
• It demonstrates robust performance in quantitative accuracy, mixed sample analysis, and inhibitor tolerance.
• The kit shows significant potential for use in forensic case examinations due to its comprehensive capabilities.