Cannabinoid Chemotypes

Cannabinoid chemotypes refer to distinct chemical profiles within cannabis varieties, defined primarily by the ratio and concentration of major cannabinoids like THC, CBD, and CBG. These profiles emerge from both genetic expression and environmental conditions during cultivation, and are classified into several standardized types (Type I: THC-dominant; Type II: THC/CBD balanced; Type III: CBD-dominant; Type IV: CBG-dominant; Type V: low-cannabinoid). Chemotype designation is central to breeding programs, regulatory frameworks, and seed selection, as it directly determines the botanical composition of harvested material. Understanding chemotypes is essential for lineage tracking and predicting offspring cannabinoid expression across generations.

Breeders selectively cross parent plants with target chemotypes to stabilize desired cannabinoid ratios in offspring. Chemotype stability—how consistently a strain expresses its chemical profile across crops and environments—is a primary breeding goal and selection criterion for commercial and research programs.