

Maize Genomics and Genetics, 2025, Vol. 16, No. 4
Received: 23 Jun., 2025 Accepted: 10 Aug., 2025 Published: 28 Aug., 2025
Herbicide resistance is a critical challenge in maize (Zea mays L.) production, often leading to yield loss and increased production costs. In this study, we explored the application of base editing technology as a precise genome modification approach to improve herbicide resistance in maize. We first reviewed the principles of cytosine and adenine base editors, highlighting their ability to induce targeted point mutations without double-strand breaks and their advantages over traditional CRISPR-Cas9 systems. Target genes associated with herbicide action pathways, such as acetolactate synthase (ALS) and 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS), were identified, and strategies for multiplex editing to broaden resistance profiles were discussed. We proposed application strategies, including the selection of monocot-compatible editor variants, optimization of delivery methods, and validation via molecular and phenotypic assays. A case study on ALS gene base editing demonstrated successful point mutation introduction, resulting in enhanced herbicide resistance and stable agronomic performance. Our findings underscore the potential of base editing to deliver precision, shorter breeding cycles, and the ability to stack multiple resistance traits, while addressing challenges such as off-target effects and regulatory considerations. This work lays the foundation for integrating base editing with advanced breeding tools to promote sustainable maize production and reduce chemical herbicide dependence.
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. Xiaojing Yang

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