Cannabinoid Pathway

The cannabinoid pathway refers to the biochemical route through which cannabis plants synthesize cannabinoids like THC and CBD from precursor molecules. This metabolic process involves multiple enzymatic steps, beginning with geranyl pyrophosphate and olivetolic acid, which combine to form cannabigerolic acid (CBGA)—the parent molecule from which other cannabinoids are derived. CBGA is then converted into THCA, CBDA, CBCA, or CBGVA by specific synthase enzymes, depending on plant genotype and environmental conditions. Understanding this pathway is foundational to cannabis genetics, as it explains how different cultivars produce distinct cannabinoid profiles and why certain strains consistently express higher ratios of specific compounds.

Breeders leverage knowledge of the cannabinoid pathway to select for plants expressing particular synthase enzymes—such as THCA synthase or CBDA synthase—that favor desired cannabinoid outcomes. By identifying and crossing plants with reliable enzymatic expression patterns, breeders can stabilize chemotype profiles across generations and develop cultivars with predictable cannabinoid compositions.