Development of A Monoclonal Antibody Sandwich ELISA for Detection of bar Gene Transgenic Plant and Element Development and Standardization of Qualitative PCR Detection Method Targeting barnase Gene Real-time Quantitative PCR Detection of Genetically Modified Maximizerâ Maize and YieldGardâ Maize Establishment of Phytase-Specific Qualitative PCR Detection Method and Construction of a Positive Plasmid Molecule