Transgene-free CRISPR editing technology to develop early-flowering rapeseed
Transgene-free CRISPR editing strategy to generate early-flowering Brassica napus by targeting flowering-time regulatory genes, including negative regulators such as FLC. The approach uses protoplast-based RNP delivery for precise genome edits and applies comparative omics and genotype-to-phenotype insights to guide gRNA selection, balancing editing efficiency and off-target risk. Planned validation includes greenhouse phenotyping and field evaluations to assess vegetative-to-reproductive transition timing and performance.
Overview
Researchers at the University of Nebraska, Lincoln, are leveraging insights from Camelina sativa to develop early-flowering rapeseed (Brassica napus) using a transgene-free CRISPR editing technology. By targeting flowering-time associated genes, particularly negative regulators like FLC, this project aims to shorten the vegetative-to-reproductive transition without compromising field performance or yield. The method draws on genotype-to-phenotype studies and comparative omics data to support successful genetic modifications that promote early flowering.
Technical specifications
Key features:
- Transgene-free CRISPR editing: Utilizes a protoplast-based ribonucleoprotein (RNP) delivery system for precise genome editing.
- Targeted gene modification: Focuses on flowering-time negative regulators, especially FLC homeologs, to induce early flowering.
- Comparative analysis and gRNA design: Incorporates functional significance, sequence conservation, editing efficiency, and off-target risk in selecting genomic targets.
- Collaborative development: Involves work with Swedish colleagues and a plant transformation core facility.
Technology readiness level
The current technology readiness level is 4, indicating that the concept is validated in the lab with initial protoplast transfection and plant regeneration processes underway. Future validation includes greenhouse phenotyping and field evaluations to further refine and advance the technology.
About University of Nebraska, Lincoln
The University of Nebraska–Lincoln is a comprehensive public research university and the flagship campus of the University of Nebraska system, combining land-grant reach with a collaborative, industry-engaged culture. A research and technology park adjacent to campus provides modern wet and dry labs, greenhouses, offices, and conferencing, enabling companies to co-locate with faculty and access shared equipment and pilot environments. A statewide extension network links university expertise with producers and communities, creating rapid pathways for field trials, demonstrations, and workforce pipelines. Research is supported by competitive federal funding from NSF, USDA, DOE, and NIH. A dedicated technology transfer office manages IP, licensing, agreements, and startup formation with industry-friendly terms.
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