Flemish population data and sequence structure of the hypervariable tetranucleotide repeat locus D12S1090.

Area of Science:

• Forensic Genetics
• Population Genetics
• Human Identification

Background:

• Short tandem repeat (STR) loci are crucial for forensic genetics and population studies.
• The tetranucleotide repeat locus D12S1090 (also known as GATA5A09) is known for high polymorphism but has been understudied.
• Understanding STR characteristics is vital for accurate identity and paternity testing.

Purpose of the Study:

• To investigate the allele frequency and sequence structure of the D12S1090 STR locus in a Flemish population.
• To assess the forensic and population-level utility of D12S1090.
• To evaluate the genetic diversity and discriminatory power of D12S1090 in this specific population.

Main Methods:

• Analysis of allele frequency and sequence structure of the D12S1090 locus.
• Study conducted on a sample of 598 individuals from Flanders, Belgium.
• Assessment of Hardy-Weinberg equilibrium and mutation frequency.

Main Results:

• D12S1090 exhibits a complex organization with GATA, TA, and other nucleotide block repetitions.
• No deviation from Hardy-Weinberg equilibrium was observed, indicating genetic stability.
• The locus is highly polymorphic, demonstrating significant discriminatory power for identity, paternity testing, and differentiating closely related populations (e.g., Flemish and Germans).
• A relatively high mutation frequency of 5.1 x 10(-3) was observed, consistent with other highly variable STRs.

Conclusions:

• D12S1090 is a powerful and informative STR marker for forensic applications and population genetics in Flemish individuals.
• Its complex structure and high polymorphism make it valuable for distinguishing individuals and populations.
• The observed mutation rate necessitates consideration in forensic interpretations.