title: Universal primer-multiplex-polymerase chain reaction (UP-M-PCR) and capillary electrophoresis-laser-induced fluorescence analysis for the simultaneous detection of six genetically modified maize lines.
abstract: To meet the labeling and traceability requirement of genetically modified (GM) maize and their products for trade and regulation, it is essential to develop a specific detection method for monitoring the presence of GM content. In this work, six GM maize lines, including GA21, Bt11, NK603, Bt176, Mir604, and Mon810, were simultaneously detected by universal primer-multiplex-polymerase chain reaction (UP-M-PCR), and the amplicons for the six event-specific genes as well as the endogenous Ivr gene were successfully separated by the method of capillary electrophoresis-laser-induced fluorescence (CE-LIF). The UP-M-PCR method overcame the disadvantages in conventional M-PCR, such as complex manipulation, lower sensitivity, amplification disparity resulting from different primers, etc., and in combination with CE-LIF, it obtained a high sensitivity of 0.1 ng for both single and mixed DNA samples. The established method can be widely used for the qualitative identification of the GM maize lines.
authors.affiliation: Laboratory of Food Safety and Molecular Biology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, People's Republic of China.
authors.forename: Chunjiao
authors.initials: C
authors.lastname: Zhang
authors.forename: Wentao
authors.initials: W
authors.lastname: Xu
authors.forename: Zhifang
authors.initials: Z
authors.lastname: Zhai
authors.forename: Yunbo
authors.initials: Y
authors.lastname: Luo
authors.forename: Xinghua
authors.initials: X
authors.lastname: Yan
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.forename: Kunlun
authors.initials: K
authors.lastname: Huang
mesh_terms: D004247:DNA / Q000032:analysis*; D018744:DNA, Plant / Q000032:analysis; D019075:Electrophoresis, Capillary; D005453:Fluorescence; D005470:Fluorometry / Q000379:methods; D007834:Lasers; D030821:Plants, Genetically Modified / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D012639:Seeds / Q000235:genetics; D003313:Zea mays / Q000235:genetics*
chemical_list: D018744:DNA, Plant; D004247:DNA