Transgene Bioconfinement: Don't Flow There

Area of Science:

• Agricultural Science
• Genetics
• Environmental Science

Background:

• Genetically engineered (GE) crops provide economic and environmental advantages.
• Concerns exist regarding transgene movement from GE crops to wild relatives, especially in native regions.
• Enhanced fitness traits in GE crops could negatively impact natural populations if introgressed.

Purpose of the Study:

• To survey bioconfinement systems for preventing transgene flow from GE crops.
• To evaluate the utility, efficacy, and commercial adoption potential of various bioconfinement strategies.
• To discuss the role of emerging technologies like CRISPR/Cas9 in transgene containment.

Main Methods:

• Review of existing and experimental bioconfinement strategies.
• Analysis of systems focusing on male and seed sterility.
• Assessment of transgene excision, delayed flowering, and gene editing approaches.

Main Results:

• Several bioconfinement approaches show promise for preventing transgene flow.
• No single system has achieved widespread commercial adoption despite decades of GE crop use.
• CRISPR/Cas9 technology presents a potential avenue for reducing or eliminating transgene flow.

Conclusions:

• Bioconfinement systems may be necessary for new GE crops or those with high outcrossing potential.
• Further development and evaluation are needed to ensure system efficacy and commercial viability.
• Addressing regulatory and environmental concerns requires robust transgene containment solutions.