[Development of an 18 X-InDel multiplex PCR system]
Fa Yi Xue Za Zhi
|July 31, 2014
Summary
A new forensic DNA typing system, InDel X-18PLEX, was developed using 18 X-chromosome Insertion/Deletion (InDel) markers. This system shows high discrimination power and exclusion chance, making it effective for forensic analysis.
Area of Science:
- Forensic genetics
- Population genetics
- Molecular biology
Background:
- Insertion/Deletion (InDel) polymorphisms on the X chromosome are valuable genetic markers.
- Developing efficient forensic DNA typing systems is crucial for identification and kinship analysis.
Purpose of the Study:
- To investigate X-chromosome InDel polymorphism.
- To screen 18 InDel loci for the Chinese Han population as an auxiliary forensic DNA typing system.
Main Methods:
- Selected 18 X-InDel markers using the Human Genome Browser and dbSNP database.
- Designed multiplex PCR primer pairs and divided them into 3 fluorescence-labeled groups.
- Investigated population genetics and performed comparative analysis across 5 Chinese ethnic groups.
Main Results:
- Successfully developed and validated the InDel X-18PLEX multiplex genotyping system with 18 X-InDel markers and 1 Amelogenin marker.
- Observed significant differences in genotype distributions among the 5 ethnic groups, with no deviation from Hardy-Weinberg equilibrium within groups.
- Achieved high female (0.9999994) and male (0.99988) discrimination power and high mean exclusion chances in trios (0.999992) and duos (0.99) for the Han population.
Conclusions:
- The InDel X-18PLEX system meets forensic DNA complementary kit requirements.
- Provides effective supplementary analytical tools for challenging forensic cases.
- Enhances forensic DNA typing capabilities, particularly for complex scenarios.
