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  • Title: Allele frequency distribution based on 17 STR markers in three major Dravidian linguistic populations of Andhra Pradesh, India.
    Author: Bindu GH, Trivedi R, Kashyap VK.
    Journal: Forensic Sci Int; 2007 Jul 20; 170(1):76-85. PubMed ID: 16753275.
    Abstract:
    Allele frequencies for 15 tetranucleotides and 2 pentanucleotides repeat loci were determined in 317 unrelated, healthy individuals of Andhra Pradesh, India, belonging to three pre-dominant endogamous populations namely, Kappu Naidu, Kamma Chaudhary and Kapu Reddy. Adherence to the expectations of the Hardy-Weinberg equilibrium (HWE) was confirmed for all loci with few exceptions, which were not significant after applying Bonferroni's correction. Statistical parameters of forensic interest; observed heterozygosity, probability of homozygosity, probability of extact test, power of discrimination, match probability, polymorphism information content, power of exclusion and mean paternity index were determined for all loci. The present study reveals that Penta E and D2S1338 are the most informative loci in all the studied populations. The combined power of discrimination was greater than 0.976, whereas the cumulative power of exclusion gave an expected value of 0.9999 for all the tested microsatellite loci. No difference was observed in the discriminatory power of 15 loci in studied populations on comparison with other populations of India. Population differentiation tests revealed significant differences between the studied and neighboring populations at several loci. Analyzed parameters indicate the utility and efficacy of the studied 17 STR systems as a powerful tool in forensic human identification, paternity testing and human population genetic studies.
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