CRISPR optimization of MIR172 secondary structure for accelerated flowering in brassica napus
Utilizing CRISPR base editing to modify MIR172 precursors in Brassica napus, this solution aims to optimize flowering time, enhancing resilience to heat and drought. The technology maintains natural miRNA sequences, minimizing off-target effects and providing a precise breeding tool.
Overview
This innovative solution leverages CRISPR base editing to optimize the secondary structure of MIR172 precursors in Brassica napus, a critical oilseed crop. By introducing single-nucleotide edits, the technology accelerates flowering time, allowing plants to complete this stage before adverse environmental conditions such as heat and drought stress. This approach ensures the mature miRNA sequence remains unchanged, minimizing off-target effects and preserving natural regulatory networks. The result is a flexible breeding tool capable of generating a gradient of flowering times, directly addressing the challenges of climate resilience and yield stability.
Technical specifications
Key Features:
- Utilizes CRISPR base editing for precise modification of MIR172 precursors.
- Maintains natural miRNA sequences to minimize off-target effects.
- Capable of generating allelic series with graded effects on flowering time.
- Optionally employs GRF-GIF chimera technology to enhance transformation efficiency in recalcitrant genotypes of B. napus.
Process Steps:
- Identification and modification of MIR172 loci in B. napus.
- Transformation via Agrobacterium, with optional GRF-GIF enhancement.
- Validation through sequencing and assessment of miRNA levels via small RNA blots and RT-qPCR.
- Evaluation of flowering time in greenhouse-grown T1/T2 lines.
Technology readiness level
This solution is currently at Technology Readiness Level 4, having demonstrated proof of concept through initial validation studies in controlled environments. Future steps include further validation and optimization in real-world agricultural settings.
About Instituto de Biología Molecular y Celular de Rosario
IBR is a public research institute jointly operated by CONICET and the National University of Rosario, with more than 240 researchers, staff, and trainees across two sites: the CONICET CCT‑Rosario campus and a facility within UNR’s Faculty of Biochemical and Pharmaceutical Sciences. For industry, the institute offers co‑located laboratories, shared instrumentation, BSL‑2/3 suites, an NMR annex, and open service platforms run by expert staff; these resources are used by more than 40 SMEs and large companies. Startup formation is supported by Bio.R, an on‑site accelerator and incubation space adjacent to the main building, complemented by a dedicated foundation that promotes transfer to the productive sector. Research is principally supported by Argentina’s national science system through CONICET and competitive programs, with international collaborations that comply with NIH Financial Conflict of Interest guidelines.
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