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CODIS STR loci data from 41 sample populations.

B Budowle1, B Shea, S Niezgoda

  • 1FBI Laboratory Division, FBI Academy, Quantico, VA 22135, USA.

Journal of Forensic Sciences
|May 25, 2001
PubMed
Summary
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Allele distributions for 13 core CODIS short tandem repeat (STR) loci were analyzed across 41 population datasets. Genetic variation was minimal across major U.S. population groups, indicating Hardy-Weinberg equilibrium.

Area of Science:

  • Forensic Genetics
  • Population Genetics
  • Human Genetics

Background:

  • Short tandem repeat (STR) loci are critical for human identification.
  • The CODIS core loci are standard markers used in forensic databases worldwide.
  • Understanding allele distributions across diverse populations is essential for accurate forensic analysis.

Purpose of the Study:

  • To determine allele frequencies for 13 CODIS core tetrameric STR loci.
  • To analyze these distributions across 41 diverse population datasets in the U.S.
  • To assess genetic variation and Hardy-Weinberg equilibrium within these populations.

Main Methods:

  • Analysis of allele frequencies for 13 CODIS STR loci (CSF1PO, D3S1358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11, FGA, TH01, TPOX, vWA).

Related Experiment Videos

  • Data compilation from 41 population datasets representing major U.S. demographic groups.
  • Statistical evaluation for departures from Hardy-Weinberg expectations (HWE) and calculation of FST values.

    • Main Results:

    • Allele distributions were determined for 13 CODIS STR loci across five major population groups: African Americans, Caucasians, Hispanics, Far East Asians, and Native Americans.
    • Little evidence of significant departures from Hardy-Weinberg expectations was observed in any population group.
    • FST estimates indicated low genetic differentiation among these populations for the analyzed STR loci, with the exception of Native Americans.

    Conclusions:

    • The analyzed CODIS core STR loci exhibit stable allele distributions across major U.S. populations.
    • The observed genetic profiles are largely in Hardy-Weinberg equilibrium, supporting their utility in forensic identification.
    • Low FST values suggest minimal population substructure for these STR markers, enhancing their reliability in forensic casework.