Secondary Metabolite Genes

Secondary metabolite genes govern the biosynthetic pathways that produce cannabinoids, terpenes, and flavonoids in cannabis tissues. Rather than primary metabolites (sugars, proteins, nucleic acids), these genes code for enzymes that build complex aromatic and psychoactive compounds. Understanding secondary metabolite genetics is central to modern cannabis breeding, as these pathways directly determine chemical phenotype. Research into the genetic architecture of these pathways remains ongoing, with studies identifying multiple genes involved in cannabinoid synthase, terpene cyclase, and flavonoid oxidase families. Breeders working to stabilize or enhance specific terpene or cannabinoid profiles focus selection pressure on these underlying genetic loci.

Breeders leverage knowledge of secondary metabolite genes to select for consistent terpene expression, cannabinoid ratios, and color production across generations. Marker-assisted selection and genomic tools increasingly allow targeted breeding for desirable metabolic profiles without relying solely on phenotypic observation.