Brassica-derived diacylated cyanidins as a natural blue color alternate for blue #1
Cornell University breeding program developing pigmented Brassica vegetables (cabbage, kale, radish, broccoli) as low-cost raw material sources for extracting diacylated anthocyanins. These natural pigments target the challenging cyan-blue color spectrum, offering a cost-effective alternative to spirulina and synthetic Blue #1 for food applications.
Overview
Cornell University has developed pigmented Brassica vegetable lines bred specifically as raw material sources for extracting diacylated anthocyanins (cyanidins). These compounds serve as natural color alternates for synthetic Blue #1, particularly in the difficult cyan-blue spectrum where most natural options fall short. The breeding program focuses on kale, cabbage, radish, and broccoli market categories, producing hybrid pink cabbage varieties and baby green types optimized for both pigment yield and horticultural functionality. By leveraging agricultural breeding rather than complex food chemistry processing, this approach delivers a significantly lower-cost raw product base compared to current natural alternatives such as spirulina.
Technical specifications
Key features:
- High diacylated anthocyanin content in selected Brassica lines, specifically targeting the cyan-blue color spectrum perceived as blue in food products
- Hybrid pink cabbage varieties with anthocyanin profiles recovering color in the cyan range, enabling use for green and blue natural color applications
- Storage-compatible types including cabbage and radish (with internal hypocotyl pigmentation) that can be produced in high quantities and stored for extended periods
- Baby green production systems for broccoli and kale where pigment production can be enhanced through controlled fertigation stress in vertical growing systems
- Genotype evaluation and HPLC analysis used to identify and advance genetic types with the highest percentages of diacylated cyanidins
- Horticultural functionality bred into the lines, making them practical raw product sources for downstream extraction and processing
Technology readiness level
The program has completed significant HPLC analysis, color spectrum contrast studies, and genotype evaluation to identify genetic types with high diacylated cyanidin percentages. Breeding has advanced materials with suitable horticultural characteristics, and hybrid pink cabbage varieties have been developed. The current stage involves providing a validated raw product base for food chemistry analysis and natural color extraction. Future research will focus on optimizing pigment production through controlled environment fertigation parameters in vertical systems and validating extraction efficiency for commercial-scale natural blue color production.
About Cornell University
Cornell University is a comprehensive private, land-grant research university with campuses in Ithaca and New York City, combining significant scale with cross-disciplinary breadth. Industry connects through open-access user facilities and prototyping labs, pilot-scale testbeds, and a research and technology park that provide pathways from discovery to demonstration. A statewide extension network and integration with a major hospital system enable real-world deployment, while a graduate campus embedded in New York City’s tech corridor provides direct access to startups, venture investors, and corporate R&D teams. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, the Department of Energy, and the U.S. Department of Agriculture. A dedicated technology transfer office streamlines IP management, licensing, startup formation, and corporate partnerships across campuses.
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