Monoterpene Pathways

Monoterpene pathways refer to the biochemical routes cannabis plants use to synthesize C10 volatile compounds—the foundational building blocks of terpene diversity. These pathways begin with geranyl pyrophosphate (GPP), a precursor molecule that branches into distinct synthetic routes producing limonene, pinene, myrcene, and other single-ring or acyclic monoterpenes. Different cultivars and chemotypes express varying enzyme activities within these pathways, resulting in distinct terpene profiles. Understanding monoterpene pathways is central to cannabis genetics research, as pathway expression is influenced by both genotype and environmental factors like temperature and light. Breeders and researchers track monoterpene pathway dominance to characterize strain families and predict aromatic phenotypes across generations.

Breeders working with monoterpene pathways select parent plants that express desired enzyme profiles—such as high limonene synthase or pinene synthase activity—to stabilize specific aromatic families. Crosses targeting particular monoterpene dominance help establish consistent terpene signatures across F1 and F2 generations, crucial for both preservation and novel chemotype development.