Genetics Vs Environment

Cannabis aroma results from the interplay between genetic potential and environmental conditions—a fundamental principle in cultivation and breeding. Terpene expression, the primary driver of smell, is encoded genetically but activated or suppressed by factors like temperature, humidity, soil composition, light spectrum, and harvest timing. Two genetically identical plants grown in different environments often produce noticeably different aromatic profiles. Breeders must account for this variability when selecting for stable terpene expression across growing conditions. Understanding this relationship helps growers reproduce consistent results and helps breeders identify which traits are heritable versus environmentally dependent.

Breeders use controlled environment testing to distinguish true genetic terpene stability from environmental artifacts, ensuring selected traits breed true across multiple generations and growing systems. This knowledge informs phenotype selection and helps predict how cultivars will perform in diverse climates and setups.