Genotype Environment Interaction

Genotype-environment interaction (G×E) describes how a cannabis plant's genetic potential expresses differently across varying cultivation conditions. The same cultivar grown indoors under controlled lighting may display notably different morphology, terpene profiles, and cannabinoid ratios compared to outdoor cultivation. Environmental factors—light spectrum, temperature fluctuations, humidity, soil composition, and nutrient availability—modulate gene expression without altering the underlying DNA sequence. This phenomenon is central to understanding why phenotypic variation occurs even within genetically identical clones. Breeders and cultivators studying G×E effects contribute critical data on strain stability and environmental responsiveness.

Plant breeders evaluate G×E to assess cultivar consistency across multiple growing environments and identify genotypes with stable expression traits. Understanding these interactions helps predict how breeding lines will perform in commercial cultivation settings before widespread release.