Mitochondrial DNA control region variation in an Iraqi population sample

Area of Science:

• Forensic genetics
• Population genetics
• Human genetics

Background:

• Mitochondrial DNA (mtDNA) typing is vital for forensic science and identifying missing persons due to its high copy number, maternal inheritance, and lack of recombination.
• Forensic reference data for mitochondrial DNA control regions in Iraqi populations, especially southern Iraq, is limited.
• The Iraqi population possesses a rich cultural history and strategic geographic location, underscoring the need for localized genetic data.

Purpose of the Study:

• To establish a forensic reference database for the mitochondrial DNA (mtDNA) control region in the Iraqi population.
• To characterize the genetic diversity within the southern Iraqi population using mtDNA control region polymorphisms.
• To provide essential data for forensic casework and missing persons investigations in Iraq.

Main Methods:

• Mitochondrial DNA (mtDNA) control region was analyzed in 203 unrelated Iraqi individuals from Samawah City.
• Polymerase chain reaction (PCR) and Sanger sequencing were employed to detect polymorphisms.
• Sequences were aligned against the revised Cambridge Reference Sequence (rCRS) for comparison.

Main Results:

• A total of 111 unique mitochondrial DNA (mtDNA) haplotypes were identified among the 203 individuals.
• The analysis revealed 143 polymorphic positions within the mtDNA control region.
• Sixty-three haplotypes were unique to individuals, while 48 were shared, providing valuable population-specific data.

Conclusions:

• This study successfully generated novel mitochondrial DNA (mtDNA) control region haplotype data for the Iraqi population.
• The findings contribute significantly to the forensic genetic landscape, offering reference data for southern Iraq.
• The generated data will be accessible via EMPOP (accession number EMP00814), facilitating future forensic and anthropological research.