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Related Concept Videos

Gene Flow02:39

Gene Flow

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Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
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Overview of Transposition and Recombination02:13

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Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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Transgenic Plants02:50

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Recombinant DNA technology called transgenesis is often used to add a foreign gene or remove a detrimental gene from an organism. Such genetically modified organisms are called transgenic organisms.
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...
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Related Experiment Video

Updated: Apr 19, 2026

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Transgene flow: facts, speculations and possible countermeasures.

Gerhart U Ryffel1

  • 1a Institut für Zellbiologie (Tumorforschung); Universitätsklinikum Essen ; Essen , Germany.

GM Crops & Food
|December 20, 2014
PubMed
Summary

Unintended transgene escape from genetically modified (GM) crops like maize and cotton is a documented issue. Future GM crop development should prioritize advanced techniques and containment to ensure ecological safety and public trust.

Keywords:
EPSP, enolpyruvylshikimate-3 phospathe conferring glyphosate resistancePAT, phosphinothricin acetyl transferase conferring glufosinate resistanceVT, volunteerapomixiscisgenesiscleistogamyinfertilityintragenesistransgene flowtransgenic mitigation

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Area of Science:

  • Agricultural biotechnology
  • Ecology
  • Genetics

Background:

  • Evidence confirms unintended transgene escape in major GM crops such as oilseed rape, maize, cotton, and creeping bentgrass.
  • Escaped transgenes have been detected in non-GM cultivars, wild relatives, and hybrid offspring, indicating gene flow.
  • The presence of unplanted stacked events suggests unintended recombination of transgenic traits.

Purpose of the Study:

  • To address the ecological risks associated with transgene escape from genetically modified (GM) crops.
  • To propose advanced gene technology strategies for future GM crop development.
  • To advocate for enhanced containment measures for GM crops.

Main Methods:

  • Review of existing evidence on transgene escape in various GM crops.
  • Discussion of potential future gene technology approaches, including site-directed mutagenesis and cisgenesis.
  • Analysis of containment strategies for managing transgene flow.

Main Results:

  • Transgene escape is a confirmed phenomenon in commercially grown GM crops.
  • Unintended recombination of transgenic traits can occur, even in non-commercially planted events.
  • The ecological consequences of continuous transgene escape remain unpredictable.

Conclusions:

  • Future GM crop development should employ sophisticated methods like site-directed mutagenesis or cisgenesis to prevent transgene escape.
  • When transgenic traits are necessary, robust containment strategies must be implemented.
  • A cautious approach to GM crop innovation is essential for sustainability and public acceptance of green gene technology.