Genotype Notation

Genotype notation refers to the standardized symbolic system breeders use to document the genetic makeup of cannabis plants, typically expressed through allele combinations (e.g., AA, Aa, aa). This notation became increasingly important as cannabis breeding professionalized, allowing cultivators to track inheritance patterns of visible traits—morphology, flowering time, cannabinoid ratios—across generations. Unlike phenotype (observable characteristics), genotype notation captures the underlying genetic information that may or may not express visibly depending on dominance relationships and environmental factors. Understanding genotype notation helps breeders predict offspring outcomes, stabilize desired traits in breeding lines, and communicate genetic structure within and across breeding programs. The system is foundational to concepts like homozygosity (genetic uniformity) versus hete

Breeders rely on genotype notation to select parent plants strategically, predict trait segregation in F1 and F2 generations, and identify which individuals carry recessive or stabilized alleles for target characteristics. Accurate genotype tracking accelerates line stabilization and reduces the number of generations needed to fix desired phenotypes.