Meat speciation by restriction fragment length polymorphism analysis using an α-actin cDNA probe.

Area of Science:

• Molecular Biology
• Food Science
• Genetics

Background:

• Classical DNA fingerprinting uses repetitive sequences, unsuitable for species identification in meat.
• Existing methods lack specificity for differentiating meat species.

Purpose of the Study:

• To evaluate a conserved actin gene probe for accurate meat speciation.
• To develop a reproducible method for identifying animal species in meat products.

Main Methods:

• Genomic DNA extraction from muscle tissue.
• Restriction digestion with BamHI and gel electrophoresis.
• Hybridization with a murine α-actin cDNA probe.

Main Results:

• Characteristic DNA fingerprints were generated for beef, pork, lamb, horse, chicken, and fish.
• The method successfully discriminated between closely related species.
• Identical patterns were observed for fresh and heated meat (120 °C).
• No significant differences were found between breeds within a species.

Conclusions:

• A single actin cDNA probe and conditions enable reliable meat speciation.
• The method is robust, reproducible, and effective for identifying diverse meat species.
• This approach offers a simple and effective tool for meat speciation and related biological applications.