title: Development of the visual loop-mediated isothermal amplification assays for seven genetically modified maize events and their application in practical samples analysis.
abstract: As more and more genetically modified (GM) crops are approved for commercialization and planting, the development of quick and on-spot methods for GM crops and their derivates is required. Herein, we established the polymerase chain reaction and agarose gel electrophoresis-free system for the identification of seven GM maize events (DAS-59122-7, T25, BT176, TC1507, MON810, BT11, and MON863) employing a loop-mediated isothermal amplification (LAMP) technique. The LAMP assay was performed using a set of four specific primers at 60-65 °C in less than 40 min, and the results were observed by direct visual observation. In these developed assays, the specificity targeted at each GM maize event based on the event-specific sequence was well confirmed, and the limits of detection were as low as four copies of maize haploid genomic DNA with an exception of 40 copies for MON810 assay. Furthermore, these developed assays were successfully used to test six practical samples with different GM maize events and contents (ranged from 0.0 to 2.0%). All of the results indicated that the established event-specific visual LAMP assays are more convenient, rapid, and low-cost for GM maize routine analysis.
authors.affiliation: Laboratory of Plant Biotechnology, College of Life and Environment Sciences, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, People's Republic of China.
authors.forename: Lili
authors.initials: L
authors.lastname: Chen
authors.forename: Jinchao
authors.initials: J
authors.lastname: Guo
authors.forename: Qidi
authors.initials: Q
authors.lastname: Wang
authors.forename: Guoyin
authors.initials: G
authors.lastname: Kai
authors.forename: Litao
authors.initials: L
authors.lastname: Yang
mesh_terms: D017931:DNA Primers / Q000235:genetics; D030821:Plants, Genetically Modified / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D013045:Species Specificity; D003313:Zea mays / Q000235:genetics*
chemical_list: D017931:DNA Primers