Genotype Phenotype Correlation

Genotype-phenotype correlation refers to the relationship between a cannabis plant's genetic makeup (genotype) and its observable characteristics, including aroma profiles (phenotype). In cannabis breeding, this correlation is fundamental but complex—identical genetic lineages can express notably different terpene profiles and aromatic signatures depending on environmental factors such as temperature, humidity, light spectrum, and soil composition. Breeders studying this relationship seek to identify which genetic markers consistently produce stable aroma outcomes across growing conditions. Understanding genotype-phenotype correlation helps predictability in breeding programs and explains phenotypic variation observed even within stabilized cultivars.

Breeders leverage genotype-phenotype correlation studies to develop reproducible aroma traits and isolate genetic factors controlling terpene expression. By growing genetically identical clones in controlled vs. variable environments, breeders identify which aromatic expressions are genetically hardwired versus environmentally induced, improving selection accuracy for future generations.