Crispr/cas9 gene editing for enhanced tomato disease resistance and yield

Overview

This research project explores the use of CRISPR/Cas9 technology to edit the CCoAOMT gene in tomatoes, specifically targeting the resistant cultivar LA2172 and the susceptible cultivar NC161L. The objective is to enhance plant defense mechanisms, improve fruit quality, and increase yield by manipulating lignin biosynthesis pathways. Lignin plays a critical role in plant defense against pathogens and environmental stresses, making this genetic modification potentially transformative for the tomato industry.

Technical specifications

• Gene Target: CCoAOMT located on tomato chromosome 5, associated with disease resistance.
• CRISPR/Cas9 System: Utilizes SpCas9 enzyme for gene knockout and precise nucleotide modifications.
• Vector Construction: Insertion of SpCas9 into the pMDC32 vector with CaMV 35S promoter and two 20-bp gRNA target sites.
• SNP Swap: Critical SNP (T vs. C) interchange between resistant LA2172 and susceptible NC161L cultivars using primer editing.
• Verification: Gene presence confirmed by RT-PCR after transformation into Agrobacterium tumefaciens strain GV3101 and selection using hygromycin.

Technology readiness level

The current technology readiness level for this project is 2, indicating that the concept has been formulated and the necessary components have been identified for further development and validation. Future work includes transgenic plant selection and analysis of edited lines' impact on growth, quality, and disease resistance.