title: Detection methods for biotech cotton MON 15985 and MON 88913 by PCR.
abstract: Plants derived through agricultural biotechnology, or genetically modified organisms (GMOs), may affect human health and ecological environment. A living GMO is also called a living modified organism (LMO). Biotech cotton is a GMO in food or feed and also an LMO in the environment. Recently, two varieties of biotech cotton, MON 15985 and MON 88913, were developed by Monsanto Co. The detection method is an essential element for the GMO labeling system or LMO management of biotech plants. In this paper, two primer pairs and probes were designed for specific amplification of 116 and 120 bp PCR products from MON 15985 and MON 88913, respectively, with no amplification from any other biotech cotton. Limits of detection of the qualitative method were all 0.05% for MON 15985 and MON 88913. The quantitative method was developed using a TaqMan real-time PCR. A synthetic plasmid, as a reference molecule, was constructed from a taxon-specific DNA sequence of cotton and two construct-specific DNA sequences of MON 15985 and MON 88913. The quantitative method was validated using six samples that contained levels of biotech cotton mixed with conventional cotton ranging from 0.1 to 10.0%. As a result, the biases from the true value and the relative deviations were all within the range of +/-20%. Limits of quantitation of the quantitative method were all 0.1%. Consequently, it is reported that the proposed detection methods were applicable for qualitative and quantitative analyses for biotech cotton MON 15985 and MON 88913.
authors.affiliation: Gene Analysis Laboratory, Experiment Research Institute of National Agricultural Products Quality Management Service, Seoul 150-043, South Korea. starlee@naqs.go.kr
authors.forename: Seong-Hun
authors.initials: SH
authors.lastname: Lee
authors.forename: Jin-Kug
authors.initials: JK
authors.lastname: Kim
authors.forename: Bu-Young
authors.initials: BY
authors.lastname: Yi
mesh_terms: D018744:DNA, Plant / Q000032:analysis; D004351:Drug Resistance / Q000235:genetics; D003368:Gossypium / Q000145:classification / Q000235:genetics*; D006540:Herbicides; D030821:Plants, Genetically Modified / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D015203:Reproducibility of Results
chemical_list: D018744:DNA, Plant; D006540:Herbicides