Chemotype Screening

Chemotype screening is a laboratory classification method used to identify and categorize cannabis plant chemistry based on cannabinoid and terpene profiles rather than morphology or traditional phenotype markers. This approach involves testing plant material to determine the presence and concentration of compounds like THC, CBD, CBG, and dominant terpene profiles. Chemotype classification enables breeders to select for specific biochemical traits independent of visual plant characteristics. The practice has become standard in regulated breeding programs where consistent cannabinoid ratios or terpene signatures are breeding objectives. Chemotypes are often designated by their primary cannabinoid ratio (THC-dominant, CBD-dominant, balanced, or minor-cannabinoid-focused) rather than named variety alone.

Breeders use chemotype screening to verify offspring chemistry aligns with intended breeding goals and to identify plants suitable for specific extraction or product applications. Chemotype data informs parent selection and helps establish stable lines where biochemistry remains consistent across generations.