Enzyme Pathways

Enzyme pathways in cannabis refer to the biochemical sequences that regulate cannabinoid and terpene synthesis. These metabolic routes—including the fatty acid oxidation pathway, mevalonate pathway, and shikimate pathway—determine which secondary metabolites a plant produces and in what proportions. Understanding enzyme pathways is foundational to cannabis breeding, as genetic variation in key enzymes (like CBDA synthase, THCA synthase, and terpene synthases) directly influences final cannabinoid and terpene profiles. Breeders and researchers study these pathways to predict offspring chemistry and identify plants with rare or desirable metabolite combinations. Modern breeding increasingly relies on pathway knowledge to develop stable, consistent genetics rather than phenotype-hunting alone.

Breeders working with enzyme pathway knowledge can select parents more strategically, targeting specific synthase activity levels and predicting chemotype ratios in crosses. Understanding pathway bottlenecks—such as which enzymes limit CBD or rare terpene production—enables more efficient trait fixation and the creation of novel cannabinoid or aromatic profiles.