Dash HR, Vajpayee K, Agarwal R, Gang A, Shukla R, Srivastava A. Evaluation of diallelic STR markers with inter-population allelic database for their usefulness in paternity trios in the Central Indian population.
Ann Hum Biol 2021;
48:605-613. [PMID:
34866517 DOI:
10.1080/03014460.2021.2014567]
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Abstract
BACKGROUND
Most of the forensic DNA laboratories have migrated to new generation STR kits of 6 dye chemistry with more than 20 autosomal STRs. The population-specific databases of such STR markers are lacking in many regions.
AIM
To evaluate the effect of the inter-population database in 100 paternity trios with no inconsistencies at 23 STRs.
SUBJECTS AND METHODS
100 paternity trios were evaluated considering inter-population allelic frequency values for calculation of Combined Paternity Index (CPI) and Probability of Paternity (POP).
RESULTS
No significant variation (p < 0.05) among the allele frequencies at the interpopulation level was observed. The number of obligate alleles and the likelihood of transferring obligate alleles from the putative father showed a positive correlation (p < 0.005) with Power of Discrimination (PD), Polymorphic Information Content (PIC), Power of Exclusion (PE), Paternity Index (PI), Observed and Expected Heterozygosity (Ho and He), and a statistically significant negative correlation (p < 0.005) with Matching Probability (Pm). The average Combined Paternity Index (CPI) and Probability of Paternity (POP) did not show any statistically significant difference (p < 0.05) at the interpopulation level.
CONCLUSION
The allelic database showed no effect on the CPI and POP in 100 paternity trios. This suggests no urgent need for using population-specific databases for statistical evaluation of paternity trios without inconsistencies.
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