Volatile Aromatic Compounds

Volatile aromatic compounds (VACs) are organic molecules that readily evaporate at room temperature, carrying the distinctive scents associated with cannabis cultivars. These compounds—including terpenes, esters, and other small molecular-weight substances—are produced primarily in trichome heads and dispersed through air as gas-phase odor. Breeders and researchers track VAC profiles to document strain lineage and environmental responses, though VAC expression varies significantly based on growth conditions, harvest timing, and curing methods. Understanding VAC classification helps cultivators and seed developers recognize how genetics interact with cultivation practices to shape aromatic phenotypes across generations.

Breeders working with volatile aromatic compounds focus on selecting parent plants with stable, reproducible terpene and ester profiles. Tracking VAC stability across generations helps establish reliable cultivar identities and informs decisions about crossing programs intended to preserve or modify sensory characteristics.