Heritability

Heritability in cannabis genetics refers to the degree to which traits are inherited from parent plants to offspring, rather than influenced by environmental factors. Understanding heritability helps breeders predict which characteristics—such as morphology, cannabinoid ratios, or terpene profiles—will reliably express across generations. High heritability traits are more stable and reproducible in breeding programs, while low heritability traits require careful environmental management and selection. Heritability is measured on a spectrum; most cannabis traits show complex inheritance patterns involving multiple genes and environmental variables. This concept is foundational to developing stable cultivars and explaining why identical genetics may express differently under varying grow conditions.

Breeders prioritize high-heritability traits when creating new lines, as these characteristics breed true more consistently and require fewer generations of selection to stabilize. Understanding heritability helps distinguish between genetic potential and phenotypic variation caused by nutrient, light, or humidity differences, enabling more efficient breeding decisions.