Thc Dominant Selections

THC-dominant selections refer to cannabis cultivars bred and selected primarily for elevated tetrahydrocannabinol (THC) concentration relative to cannabidiol (CBD) and other minor cannabinoids. Modern breeding programs intensified focus on THC dominance beginning in the 1970s–1980s, particularly in regions with established cultivation networks. These selections typically exhibit THC:CBD ratios ranging from 10:1 to 50:1 or higher, depending on variety and environmental conditions. Lineage records frequently report THC-dominant traits emerging from deliberate crossing of high-THC parent plants over multiple generations. This classification encompasses the majority of contemporary recreational-market genetics, though cannabinoid profiles vary significantly by strain family and phenotype.

Breeders working with THC-dominant selections prioritize trait stability through backcrossing and phenotype selection, documenting cannabinoid ratios via testing to identify consistent high-THC expressions. Understanding THC dominance is foundational for targeted breeding programs aiming to develop novel chemotypes, refine terpene profiles in high-THC backgrounds, or produce F1 hybrids with predic