Generating Mutant for a Stress-Responsive Gene in Rice Using CRISPR-Cas9 System.

Area of Science:

• Agricultural Science
• Molecular Biology
• Biotechnology

Background:

• The CRISPR/Cas9 system is a powerful genome editing tool widely used in various organisms, including crop plants.
• Its popularity stems from its simplicity, cost-effectiveness, and reliability in genetic engineering.
• This system utilizes a Cas9 nuclease guided by a single guide RNA (gRNA) to create targeted double-strand DNA breaks (DSB).

Purpose of the Study:

• To present a simplified and efficient protocol for generating targeted gene mutations in rice using the CRISPR/Cas9 system.
• To facilitate basic and applied research in crop improvement through accessible genome editing techniques.

Main Methods:

• Utilizing the CRISPR/Cas9 system for targeted genome modification in rice.
• Employing a single guide RNA (gRNA) to direct the Cas9 nuclease to specific DNA sequences.
• Leveraging the cell's natural DNA repair mechanisms (non-homologous end joining) to introduce insertions or deletions (indels) at the target site.

Main Results:

• Successful generation of double-strand DNA breaks (DSB) at the targeted genomic locus in rice.
• Induction of mutations, characterized by nucleotide additions or deletions, at the DSB site through error-prone repair.
• Demonstration of a simplified protocol applicable for generating mutants in genes of interest in rice.

Conclusions:

• The simplified CRISPR/Cas9 protocol provides an effective means for generating gene mutants in rice.
• This method holds significant value for advancing both fundamental understanding and practical applications in rice research and crop development.