Genotype Environment

Genotype-environment (GxE) interactions describe how a cannabis plant's genetic potential expresses differently across growing conditions. Two clones of identical genetics may develop notably different aromatic profiles depending on temperature, humidity, light spectrum, soil composition, and nutrient availability during development. Breeders and cultivators working in controlled environments have documented that terpene production—particularly volatile compounds like limonene, myrcene, and pinene—responds measurably to environmental variables. Understanding GxE is essential for reproducible cannabis breeding and cultivation, as it clarifies why reported aromas from seed banks may vary from actual phenotypes in different grow spaces. This principle underpins modern phenotype stabilization efforts and informs how breeders select parent plants under standardized conditions.

Breeders conducting GxE trials isolate genetic effects from environmental noise by growing identical clones in multiple controlled environments. This data helps identify which terpene and aroma traits are genetically fixed versus environmentally plastic, directing selection toward more stable aromatic expressions across cultivation scenarios.