ArticleBMC genomics2026
An improved Agrobacterium-mediated transformation method for genome editing using CRISPR/Cas9 in elite indica rice (Oryza sativa L.).
Article in BMC genomics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Rice feeds nearly half of the world’s population and underpins global food security. Climate change now poses a major threat to rice productivity worldwide. Genome editing has reshaped crop improvement strategies. Among these tools, the Clustered Regularly Interspaced Short Palindromic Repeats/CRISPR-associated protein (CRISPR/Cas) system stands out for its precision, efficiency, and scalability. However, Agrobacterium-mediated transformation efficiency is often low, particularly in indica rice varieties. Here, we optimized an Agrobacterium-mediated transformation protocol for indica rice cultivars. The method was established in Lalat and MTU-1010. Seed-derived embryogenic calli were used to introduce the thermosensitive genic male sterile (OsTMS5) gene. A CRISPR/Cas9 vector carrying a gRNA and the selectable marker hptII was used for transformation. Callus induction reached 96.87% in MTU-1010 and 93.30% in Lalat MS medium supplemented with 3 mg/L 2,4-D and 0.5 mg/L BAP. In contrast, regeneration efficiency was higher in Lalat (90.28%) than in MTU-1010 (87.51%) on MS medium supplemented with 0.25 mg/L NAA, 0.5 mg/L kinetin, and 2 mg/L BAP. In addition, PCR analysis further verifies the integration of the transgene. Subsequently, the transformation efficiency was 37.20% in Lalat and 29.62% in MTU-1010. Therefore, this protocol provides a robust platform for gene function analysis and trait editing in rice. Its application may accelerate yield improvement and enhance stress tolerance under changing climatic conditions.
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