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A real-time quantitative polymerase chain reaction (PCR) technique was developed for the quantification of chamois and pyrenean ibex DNAs in meat mixtures by using a SYBR green detection platform. Two species-specific systems and a eukaryotic endogenous system were combined in the real-time PCR approach to quantify the target species. In the specific systems, a 133 base pair (bp) fragment of the 12S rRNA gene was amplified from chamois DNA, and an 88 bp fragment from the D-loop region was amplified from pyrenean ibex DNA. In the endogenous system, universal primers amplified a 141 bp fragment on the nuclear 18S rRNA gene from eukaryotic DNA. The threshold cycle values obtained with the 18S rRNA primers were used to normalize those obtained from chamois- or pyrenean ibex-specific systems, serving as endogenous control for the total content of PCR-amplifiable DNA in the sample. Analysis of experimental raw and heat-treated binary mixtures of chamois and pyrenean ibex meat in a swine meat matrix demonstrated the suitability of the assay for the detection and quantification of the target DNAs in the range of 0.10.8, depending on the species and treatment of the meat samples.

Real-Time PCR for Quantitative Detection of Chamois (Rupicapra rupicapra) and Pyrenean Ibex (Capra pyrenaica) in MeatMixtures