Species Determination Within the Felidae Family Using mtDNA Minibarcoding

Area of Science:

• Conservation genetics
• Molecular ecology
• Forensic science

Background:

• Wildlife forensic analysis often involves degraded DNA from sources like tanned hides and traditional medicine products.
• Traditional DNA barcoding struggles with these degraded samples due to the inability to amplify long DNA fragments.
• Short DNA fragments are crucial for species identification in challenging forensic cases.

Purpose of the Study:

• To develop and validate a DNA minibarcoding method for analyzing degraded wildlife samples.
• To design primers for amplifying short mitochondrial DNA (mtDNA) fragments of the cytochrome C oxidase subunit I (COI) gene.
• To enhance species identification accuracy in wildlife forensics.

Main Methods:

• Designed five primer pairs to amplify short mtDNA fragments (~100 bp).
• Sequenced and aligned fragments to cover ~500 bp of the COI gene.
• Validated primers using in silico analysis and experimental testing on degraded and non-degraded animal tissues.

Main Results:

• The DNA minibarcoding method successfully amplified short DNA fragments from degraded samples.
• The method demonstrated high efficacy and reliability in species identification.
• Validated primers provide a robust tool for analyzing challenging DNA sources.

Conclusions:

• The developed DNA minibarcoding technique overcomes limitations of traditional barcoding for degraded samples.
• This method significantly improves the accuracy and success rate of species identification in wildlife forensics.
• The technique supports effective wildlife conservation, management, and legal investigations.