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Transgene introgression from genetically modified crops to their wild relatives
C Neal Stewart1, Matthew D Halfhill, Suzanne I Warwick
1Department of Plant Sciences, University of Tennessee, Knoxville, Tennessee 37996, USA. nealstewart@utk.edu
Nature Reviews. Genetics
|October 4, 2003
Summary
Gene flow from crops to wild relatives is a concern. This research explores genetic barriers and transformation strategies to mitigate unintended transgene persistence and ecological impacts.
Area of Science:
- Agricultural Science
- Genetics
- Ecology
Background:
- Engineered transgenes in crops pose a risk of unintended gene flow to wild relatives.
- Concerns exist regarding the environmental persistence and potential negative ecological consequences of these transgenes.
Purpose of the Study:
- To investigate which crops and transgenic traits raise the most concern for gene escape.
- To identify natural genetic barriers that can minimize transgene flow.
- To explore the potential of exploiting genetic transformation processes to create new barriers to gene flow.
Main Methods:
- Review of existing literature on transgene escape and gene flow.
- Analysis of crop-wild relative interactions and genetic compatibility.
- Evaluation of genetic engineering techniques for containment strategies.
Main Results:
- Certain crops and traits present higher risks for transgene persistence in wild relatives.
- Natural genetic barriers vary in their effectiveness in preventing gene flow.
- The genetic transformation process itself may offer avenues for engineering containment.
Conclusions:
- Understanding transgene flow risks is crucial for risk assessment.
- Natural and engineered genetic barriers are key to minimizing ecological impacts.
- Further research is needed to optimize containment strategies for genetically engineered crops.
Keywords:
Non-programmatic