Technological breakthroughs in generating transgene-free and genetically stable CRISPR-edited plants

Area of Science:

• Agricultural Science
• Biotechnology
• Genetics

Background:

• CRISPR/Cas9 gene editing offers significant potential for crop improvement.
• A key challenge is producing transgene-free edited crops for trait stability and regulatory approval.

Purpose of the Study:

• To present and evaluate various strategies for generating transgene-free and target gene-edited crop plants.
• To provide guidance on selecting optimal strategies for specific crop editing applications.

Main Methods:

• Genetic segregation through sexual reproduction.
• Marker-assisted tracking for transgene elimination.
• Programmed self-elimination of transgenes using suicide genes.
• Non-transgenic approaches like ribonucleoprotein transfection and transient expression.
• Nanobiotechnology applications.

Main Results:

• Multiple strategies effectively generate transgene-free gene-edited crops.
• Genetic segregation and marker-assisted selection are viable but can be time-consuming.
• Self-eliminating transgenes and non-transgenic methods accelerate the process.
• Each strategy has distinct advantages and disadvantages.

Conclusions:

• Effective methods exist to produce transgene-free CRISPR/Cas9 gene-edited crops.
• The choice of strategy depends on the specific crop and desired outcomes.
• These advancements are vital for the commercialization and regulatory acceptance of gene-edited crops.