Creating Targeted Gene Knockouts in Brassica oleracea Using CRISPR/Cas9

Area of Science:

• Agricultural Science
• Biotechnology
• Plant Genetics

Background:

• Genetic modification faces public and political challenges, limiting its application.
• Genome editing presents a more efficient alternative for altering plant traits by modifying existing genes.

Purpose of the Study:

• To describe an Agrobacterium-mediated genome editing method for Brassica oleracea.
• To demonstrate the recovery of non-transgenic, genome-edited Brassica oleracea plants.

Main Methods:

• Utilized Agrobacterium-mediated delivery of Cas9 and dual sgRNAs.
• Targeted 4-day-old cotyledonary petioles of Brassica oleracea.
• Analyzed mutations in primary transgenic and subsequent T1 and T2 generations.

Main Results:

• Detected mutations in approximately 10% of primary transgenic plants.
• Observed segregation of mutations away from T-DNA in later generations.
• Successfully recovered non-transgenic plants with targeted mutations.

Conclusions:

• Agrobacterium-mediated genome editing is effective in Brassica oleracea.
• This approach facilitates the development of edited plants without foreign DNA integration.
• Genome editing offers a promising tool for crop improvement and genetic variation.