The invention discloses a
fluorescence quantitative PCR (
Polymerase Chain Reaction) detection method for a
porcine transmissible gastroenteritis virus gene S and a primer thereof in the technical field of
biotechnology. The method comprises the following steps of:
cloning a PCR amplification target segment identified as a positive PCR product to a vector pMD18-T, transforming to a
competent cell DH5alpha, selecting positive clone by screening blue and
white spots and identifying sequencing; extracting a positive recombinant
plasmid, quantifying by using an
ultraviolet spectrophotometer, diluting a
standard product series by 10 times of gradient until the final concentration is 1.0*10<3>-1.0*10<11> copies / mL, undergoing a
fluorescence quantitative PCR by taking the
standard product series as a template, and establishing a
fluorescence quantitative PCR
standard curve; and extracting
virus RNA (Ribonucleic Acid) of a clinical excrement sample, undergoing a fluorescence quantitative PCR, and calculating the content of viruses in the sample according to a result and the
standard curve, wherein the sequences of the primer are sequence 1 and sequence 2. The method and the primer have theadvantages that: a fluorescent probe does not need to be designed additionally, the cost is lowered, operation is easy and convenient, and detection can be completed within 2 hours. The detection method and the primer are suitable for any fluorescence
quantitative PCR instrument, and can be applied to the detection of large-scale and high-flux samples.