Terpene Expression Dominance

Terpene expression dominance refers to the genetic tendency of certain cannabis lines to produce and accumulate specific aromatic compounds more prominently than others, regardless of environmental conditions. This trait is polygenic—controlled by multiple genes—and influences the relative ratios of limonene, myrcene, pinene, and other volatile compounds in mature flowers. Breeders working in this category often select parent plants that reliably express desired terpene profiles across generations, making these genetics predictable for cultivation and breeding programs. Understanding terpene dominance helps explain why two plants from the same strain family may show variation in aroma intensity or character. This trait intersects with cannabinoid expression and plant maturation timing, making it a key consideration in phenotype stabilization efforts.

Breeders leverage terpene expression dominance when developing stable F1 hybrids or IBL (inbred line) strains that reliably produce specific aromatic profiles. Selecting and stabilizing dominant terpene phenotypes across multiple generations allows breeders to create reproducible cultivars for seed lines and commercial cultivation.