Monogenic Selection

Monogenic selection refers to breeding work focused on a single gene or trait controlled by one primary genetic locus. In cannabis cultivation, breeders practicing monogenic selection typically isolate and stabilize individual characteristics—such as specific cannabinoid ratios, leaf morphology, or flowering time—by selectively crossing plants that express the desired allele. This approach contrasts with polygenic selection, where multiple genes influence the trait. Monogenic traits in cannabis often follow predictable inheritance patterns, making them valuable for establishing true-breeding lines. Examples commonly tracked in breeding records include certain terpene profiles, specific leaf shapes, or simple color variations. Understanding monogenic inheritance helps breeders achieve rapid stabilization of single-trait improvements.

Breeders use monogenic selection to efficiently fix desirable single traits into new varieties, reducing selection cycles compared to polygenic work. This method is particularly useful for establishing seed lines with consistent, predictable expression of one key characteristic across generations.