Thc Content

THC content refers to the concentration of tetrahydrocannabinol, the primary psychoactive cannabinoid in cannabis, typically measured as a percentage of dry flower weight. Breeders working in this category have historically selected for plants expressing higher or lower THC biosynthesis pathways, creating lineages that range from trace amounts to 30%+ concentrations. THC potency became a major breeding target starting in the 1980s-90s, particularly in regions with established cultivation markets. Modern testing labs quantify THC content through HPLC or GC-MS chromatography, providing standardized metrics for breeder selection. Understanding THC concentration genetics remains foundational to cannabis breeding programs, as the trait is polygenic and influenced by both cultivar lineage and environmental conditions.

Breeders use THC content measurements to maintain strain consistency, establish parental plant lines for crosses, and develop cultivars for specific market segments or research applications. Selection for high or low THC expression requires multiple generations of phenotypic screening and predictive lineage mapping.