Human Y-chromosomal STR haplotypes in a Kurdish population sample

Area of Science:

• Population Genetics
• Human Genetics
• Forensic Science

Background:

• Understanding Y-chromosome short tandem repeat (STR) diversity is crucial for population genetics and forensic applications.
• Previous studies have not extensively characterized the Y-chromosome STR profiles of the Iraqi Kurdish population.

Purpose of the Study:

• To analyze the genetic diversity of seven polymorphic Y-chromosome STR loci in an Iraqi Kurdish population sample.
• To compare the observed Y-chromosome haplotypes with those of neighboring populations, specifically Turks and Germans.

Main Methods:

• Typing of seven Y-chromosome STR loci (DYS19, DYS389 I/II, DYS390, DYS391, DYS392, DYS393, and DXYS156-Y) in 101 Iraqi Kurdish individuals.
• Subtyping of the DYS389 locus into its four segments for detailed analysis.
• Calculation of haplotype diversity and comparison of observed haplotypes with other populations.

Main Results:

• A high haplotype diversity of 97.83% was observed, with 82 distinct haplotypes identified in the sample.
• The Iraqi Kurdish population shared some Y-chromosome types with southern Turks.
• A strikingly low degree of shared Y-chromosome types was found between Kurds and Germans, with sequence matches being 20-30 times less likely between these groups.

Conclusions:

• The Iraqi Kurdish population exhibits significant Y-chromosome STR diversity.
• The genetic data suggest a closer Y-chromosome relationship between Kurds and Turks compared to Kurds and Germans.
• These findings contribute to understanding the population history and genetic landscape of the Middle East.