Generation of targeted mutant rice using a CRISPR-Cpf1 system

Area of Science:

• Plant biotechnology
• Molecular biology
• Genetics

Background:

• CRISPR-Cpf1 is a novel CRISPR-Cas system engineered for genome editing.
• Its application in plant mutagenesis, particularly in rice, requires thorough investigation.

Purpose of the Study:

• To evaluate the efficacy of the engineered CRISPR-Cpf1 system for inducing targeted mutations in rice.
• To assess the efficiency, specificity, and heritability of CRISPR-Cpf1-induced mutations in rice.

Main Methods:

• Stable transformation of rice plants with the CRISPR-Cpf1 system.
• Targeting specific sequences within the OsPDS and OsBEL genes.
• Comparison of pre-crRNAs and mature crRNAs for mutation efficiency.

Main Results:

• CRISPR-Cpf1 efficiently induced mutations at both targeted genes in transgenic rice.
• Pre-crRNAs demonstrated significantly higher editing efficiencies than mature crRNAs.
• CRISPR-Cpf1-induced mutations were specific and heritable across generations.

Conclusions:

• CRISPR-Cpf1 is a powerful and efficient tool for generating specific and heritable targeted mutations in rice.
• This system represents a novel and important approach for precise plant genome editing.
• The use of pre-crRNAs enhances the efficiency of CRISPR-Cpf1-mediated mutagenesis in rice.