Polyketide Pathway

The polyketide pathway is a fundamental biochemical route in cannabis that generates diverse secondary metabolites, including flavonoids, stilbenes, and certain aromatic compounds. Unlike the more widely studied cannabinoid and terpene biosynthetic routes, polyketide-derived compounds accumulate in plant tissues and contribute to the phytochemical profile. Breeders and researchers studying cannabis chemistry recognize polyketide metabolism as a parallel biosynthetic axis that influences overall plant composition. The pathway operates through the action of polyketide synthase enzymes, which iteratively condense acyl units to build larger molecular structures. Understanding polyketide production helps explain variation in cannabis flower pigmentation, UV-protective compounds, and non-volatile secondary metabolites across cultivars and genetic backgrounds.

Breeders working in chemotype selection increasingly consider polyketide-derived traits—particularly flavonoid expression and pigmentation stability—as markers of genetic diversity. Cultivars with enhanced polyketide pathway activity often exhibit distinctive visual and chemical profiles, informing decisions in lineage development and trait stacking programs.