Phenotype Genotype

Phenotype and genotype are foundational concepts in cannabis breeding genetics. Genotype refers to the complete genetic code of a plant—the DNA blueprint inherited from parent strains—while phenotype is the observable physical expression of those genes in specific environmental conditions. A single genotype can produce multiple phenotypes depending on factors like light, temperature, humidity, and soil composition. Understanding this distinction is critical for breeders working to stabilize traits across generations and for cultivators seeking consistency in growth patterns and plant structure. Breeders use controlled environments and selective crosses to identify which genetic traits reliably express, allowing them to predict offspring characteristics more accurately.

Professional breeding programs rely on phenotype-genotype separation to isolate desirable traits and fix them into stable lines. By growing identical genotypes across varying conditions and comparing results, breeders identify which traits are genetic versus environmentally induced—essential for creating true-breeding cultivars.