Secondary Metabolite Pathways

Secondary metabolite pathways are the biochemical routes through which cannabis plants synthesize compounds beyond primary growth and survival needs—including cannabinoids, terpenes, and flavonoids. These pathways are regulated by genetics, environmental conditions, and developmental stage, making them central to breeding and phenotype expression. Understanding secondary metabolism helps breeders select for desired chemical profiles and predict chemotypic outcomes across generations. Different cultivars exhibit distinct pathway activity levels; some prioritize cannabinoid production while others emphasize volatile terpene accumulation. Lineage records frequently report variation in metabolite ratios even within stabilized cultivars, reflecting the polygenic nature of these biosynthetic routes.

Breeders working in this category select parent plants based on secondary metabolite profiles—measured via gas chromatography or liquid chromatography—to stabilize desired chemotypes. Crosses targeting specific terpene or cannabinoid dominance rely on understanding which genetic backgrounds express preferred pathway ratios across multiple generations.