Trait Heritability

Trait heritability refers to the proportion of phenotypic variation in a cannabis population that can be attributed to genetic differences rather than environmental factors. This concept is fundamental to understanding which characteristics—plant height, leaf morphology, cannabinoid ratios, terpene profiles—reliably pass from parent to offspring. Heritability estimates vary across traits; some show high heritability (consistent inheritance patterns), while others demonstrate low heritability (greater environmental sensitivity). Breeders distinguish between broad-sense heritability (all genetic contributions) and narrow-sense heritability (additive genetic effects), the latter being more predictive for selective breeding outcomes. Accurate assessment requires controlled grows, replicated crosses, and multi-generation observation. Understanding heritability helps breeders identify which tr

Breeders prioritize traits with high heritability estimates when selecting parents for stabilization and strain development, as these characteristics reliably transmit across generations. Traits with low heritability require greater environmental control and longer stabilization timelines, informing breeding strategy and resource allocation decisions.