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Related Experiment Video

Updated: May 5, 2026

Agrobacterium-Mediated Immature Embryo Transformation of Recalcitrant Maize Inbred Lines Using Morphogenic Genes
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A built-in strategy to mitigate transgene spreading from genetically modified corn.

Jing Li1, Hui Yu, Fengzhen Zhang

  • 1State Key Laboratory of Rice Biology, Institute of Insect Sciences, School of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China.

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|December 11, 2013
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Summary

New genetically modified (GM) corn offers built-in biological containment. Silencing a specific gene makes GM corn sensitive to a common herbicide, preventing transgene spread from conventional fields.

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Area of Science:

  • Agricultural Science
  • Biotechnology
  • Genetics

Background:

  • Transgene spread from genetically modified (GM) corn is a significant concern.
  • Current containment relies on physical isolation, which is not always sufficient.
  • New biological containment strategies are needed to mitigate transgene escape.

Purpose of the Study:

  • To develop and evaluate a novel built-in biological containment method for GM corn.
  • To engineer GM corn with herbicide sensitivity for effective transgene control.
  • To assess the efficacy of this containment strategy in field conditions.

Main Methods:

  • Constructed an RNAi cassette to suppress CYP81A9 (nicosulfuron detoxifying enzyme) and an expression cassette for glyphosate-tolerant EPSPS G10.
  • Transformed corn with these constructs using Agrobacterium-mediated transformation.
  • Conducted field tests to evaluate herbicide sensitivity and transgene containment.

Main Results:

  • Generated GM corn plants sensitive to nicosulfuron and resistant to glyphosate, opposite to conventional corn.
  • Field tests confirmed GM corn with silenced CYP81A9 could be effectively controlled with nicosulfuron at recommended doses.
  • The developed method demonstrated effective biological containment of transgenes.

Conclusions:

  • The built-in containment method effectively mitigates transgene spreading in GM corn.
  • This approach offers an easy-to-implement biological solution to transgene escape.
  • The strategy presents a promising advancement in GM crop safety and management.