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D3S1358: sequence analysis and gene frequency in a German population

E Mornhinweg1, C Luckenbach, R Fimmers

  • 1Institut für Anthropologie und Humangenetik, Tübingen, Germany.

Forensic Science International
|September 2, 1998
PubMed
Summary

This study sequenced eight alleles of the D3S1358 short tandem repeat (STR) system. Analysis of 499 individuals from Southwest Germany revealed no Hardy-Weinberg deviation, with a mutation rate of 0.8%.

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Area of Science:

  • Forensic genetics
  • Population genetics
  • Molecular biology

Background:

  • Short tandem repeat (STR) loci are crucial for human identification.
  • Understanding STR allele diversity and frequency is essential for population genetics and forensic applications.
  • The D3S1358 locus is a commonly used marker in forensic DNA profiling.

Purpose of the Study:

  • To characterize the alleles of the D3S1358 STR system.
  • To determine the allele frequencies in a Southwest German population.
  • To compare allele frequencies with a Portuguese population and estimate the mutation rate.

Main Methods:

  • Sequencing of eight D3S1358 alleles.
  • Analysis of allele sizes and repeat motifs (tetranucleotides [AGAT] and [AGAC]).

Related Experiment Videos

  • Population genetics analysis of 499 unrelated individuals from Southwest Germany and comparison with a Portuguese sample.

    • Main Results:

    • Observed alleles ranged from 119 bp (13 repeats) to 147 bp (20 repeats).
    • Allele frequencies in the Southwest German population showed no deviation from Hardy-Weinberg equilibrium.
    • Minor differences in allele distribution were noted when compared to a Portuguese population, with one allele absent in the Portuguese sample.

    Conclusions:

    • The D3S1358 STR system exhibits specific allele characteristics and repeat structures.
    • The genetic profile of the Southwest German population at D3S1358 is in equilibrium.
    • Population-specific allele frequency data are important for accurate forensic interpretation and understanding human genetic variation.