01704nam a2200241Ia 4500 MX-MdCICY 20260521091750.0 CICY B-20992 Enhancing rice panicle branching and grain yield through tissue-specific brassinosteroid inhibition Science, 383(6687), p.eadk8838, 2024 Crop yield potential is constrained by the inherent trade-offs among traits such as between grain size and number. Brassinosteroids (BRs)promote grain size, yet their role in regulating grain number is unclear. By deciphering the clustered-spikelet rice germplasm, we show that activation of the BR catabolic gene BRASSINOSTEROID-DEFICIENT DWARF3 (BRD3)markedly increases grain number. We establish a molecular pathway in which the BR signaling inhibitor GSK3/SHAGGY-LIKE KINASE2 phosphorylates and stabilizes OsMADS1 transcriptional factor, which targets TERMINAL FLOWER1-like gene RICE CENTRORADIALIS2. The tissue-specific activation of BRD3 in the secondary branch meristems enhances panicle branching, minimizing negative effects on grain size, and improves grain yield. Our study showcases the power of tissue-specific hormonal manipulation in dismantling the trade-offs among various traits and thus unleashing crop yield potential in rice. Zhang, X. Meng, W. Liu, D. Pan, D. Yang, Y. Chen, Z. Tong, H. https://drive.google.com/file/d/17ltIptoXzwVNNIQdy2RW-yI9sebuS0HC/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 31010 31010 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-20992 2025-06-25 16:24:59 2025-06-25 REF1