A research team has produced the first gap-free, telomere-to-telomere (T2T) reference genome for broccoli and used it to uncover a major genetic switch behind purple bud coloration. The assembly closes longstanding gaps across all nine chromosomes, giving researchers a clearer view of regions that were previously difficult to resolve. Guided by this complete map, the team identified BoF3'H as a key regulator of anthocyanin production and showed that disrupting the gene sharply reduced purple pigments and turned buds green. The work links genome completeness directly to trait discovery, offering a practical foundation for breeding broccoli with tailored color, nutritional quality, stress resilience and market appeal for consumers and growers worldwide.