Polygenetic Traits

Polygenetic traits in cannabis are characteristics controlled by multiple genes rather than a single locus, resulting in continuous variation across populations rather than discrete categories. Height, leaf morphology, cannabinoid ratios, and terpene profiles are commonly understood as polygenetic expressions. This polygenic inheritance pattern means offspring phenotypes typically fall along a spectrum, reflecting contributions from both parental genomes and environmental factors. Breeders working with polygenetic traits observe more nuanced segregation across generations compared to monogenetic traits, requiring larger sample sizes and longer evaluation periods to identify consistent patterns. Understanding polygenetic inheritance is foundational to modern cannabis breeding selection, as most commercially relevant characteristics involve multiple genetic loci.

Breeders selecting for polygenetic traits employ population-level statistics and multi-generational observation rather than simple Mendelian crosses. Stabilizing desirable polygenetic expressions typically requires sustained selection pressure across multiple generations, making these traits central to cultivar development and line refinement.