scholarly journals LIFE‐Seq: A universal Large Integrated DNA Fragment Enrichment Sequencing strategy for deciphering the transgene integration of genetically modified organisms

2022 ◽  
Author(s):  
Hanwen Zhang ◽  
Rong Li ◽  
Yongkun Guo ◽  
Yuchen Zhang ◽  
Dabing Zhang ◽  
...  
Keyword(s):  
Genetically Modified Organisms ◽  
Genetically Modified ◽  
Transgene Integration ◽  
Sequencing Strategy ◽  
Dna Fragment

scholarly journals LIFE-Seq: A universal Large Integrated DNA Fragment Enrichment Sequencing strategy for transgene integration in genetically modified organisms

2021 ◽  
Author(s):  
Hanwen Zhang ◽  
Rong Li ◽  
Yongkun Guo ◽  
Yuchen Zhang ◽  
Dabing Zhang ◽  
...  
Keyword(s):  
Tandem Repeats ◽  
Genetically Modified Organisms ◽  
Genetically Modified ◽  
Transgenic Crops ◽  
Molecular Characterisation ◽  
Dna Fragments ◽  
Crop Species ◽  
Exogenous Dna ◽  
Transgene Integration ◽  
Dna Fragment

AbstractMolecular characterisation of genetically modified organisms (GMOs) yields basic information on exogenous DNA integration, including integration sites, entire inserted sequences and structures, flanking sequences and copy number, providing key data for biosafety assessment. However, there are few effective methods for deciphering transgene integration, especially for large DNA fragment integration with complex rearrangement, inversion, and tandem repeats. Herein, we developed a universal Large Integrated DNA Fragments Enrichment strategy combined with PacBio Sequencing (LIFE-Seq) for deciphering transgene integration in GMOs. Universal tilling DNA probes targeting transgenic elements and exogenous genes facilitate specific enrichment of large inserted DNA fragments associated with transgenes from plant genomes, followed by PacBio sequencing. LIFE-Seq were evaluated using six GM events and four crop species. Target DNA fragments averaging ∼6275 bp were enriched and sequenced, generating ∼26,352 high fidelity reads for each sample. Transgene integration structures were determined with high repeatability and sensitivity. Compared with whole-genome sequencing, LIFE-Seq achieved better data integrity and accuracy, greater universality, and lower cost, especially for transgenic crops with complex inserted DNA structures. LIFE-Seq could be applied in molecular characterisation of transgenic crops and animals, and complex DNA structure analysis in genetics research.

Capturing the Benefits of Genetically Modified Organisms for the Poor

2008 ◽  
Vol 10 (3) ◽  
pp. 38-40
Author(s):  
Catherine Ragasa ◽  
Eija Pehu
Keyword(s):  
Genetically Modified Organisms ◽  
Genetically Modified ◽  
The Poor
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