Polygenetic Traits

Polygenetic traits in cannabis refer to characteristics controlled by multiple genes rather than a single locus, resulting in continuous variation across populations. Common polygenetic features include plant height, leaf morphology, resin production, and terpene profile complexity. Breeders observe these traits expressing along a spectrum—no single phenotype dominates, but rather distributions emerge across progeny. Understanding polygenetic inheritance is foundational to cannabis genetics work, as most commercially relevant traits (vigor, yield potential, cannabinoid ratios) involve multiple genetic contributors. This polygenic architecture means selection for desired traits requires multi-generational observation and careful record-keeping.

Breeders working with polygenetic traits must employ population-level selection strategies across multiple generations rather than simple dominant/recessive crosses. Tracking phenotypic distributions and backcrossing high-performing individuals helps stabilize desired trait combinations, though complete homogeneity is rarely achievable with polygenic systems.