Global population growth increases the demand for nutritious food, while tomato (Solanum lycopersicum L.) productivity often declines due to biotic and abiotic stress. CRISPR/Cas9 technology offers a precision approach to improving the nutritional quality, disease resistance, and metabolic efficiency of tomatoes. This review analyzes research from 2015 to 2025 on gene editing related to vitamin C enhancement, leaf morphology modification, fruit ripening, and strengthening resistance to pathogens such as TYLCV and powdery mildew, with Agrobacterium-based transformation proven effective in producing stable changes. However, challenges such as off-target risks and limited access to technology remain obstacles. Overall, CRISPR/Cas9 has the potential to accelerate tomato variety improvement for global food security, but further research is needed to enhance the precision and sustainability of its development.
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