Phytochemical Phenotype

Phytochemical phenotype refers to the observable chemical profile of a cannabis plant—the specific combination of cannabinoids, terpenes, flavonoids, and other secondary metabolites it expresses. This phenotype results from both genetic potential and environmental conditions during cultivation, making it distinct from genotype alone. Breeders and researchers use phytochemical analysis to identify and stabilize desirable compound profiles across generations. Understanding phenotype variation within a strain family is central to cannabis genetics work, as identical genetics can express different terpene ratios or cannabinoid levels under different growing conditions.

Breeders select for consistent phytochemical phenotypes by growing multiple plants from the same cross and analyzing their secondary metabolite profiles using techniques like GC-MS or HPLC. Stabilizing a target phenotype—high myrcene with specific cannabinoid ratios, for example—typically requires multiple generations of selection and testing across varied environments.