Genotype Selection

Genotype selection refers to the deliberate breeding practice of choosing parent plants based on their genetic makeup rather than phenotypic expression alone. Breeders working in cannabis genetics use genotype selection to identify and propagate plants carrying desirable alleles for traits like cannabinoid production, terpene profiles, disease resistance, or growth characteristics. This approach relies on genetic testing, pedigree tracking, and understanding inheritance patterns across generations. Genotype selection differs from phenotype selection because two plants may look identical but carry different recessive genes that express in offspring. Modern breeding programs frequently combine genotype data with traditional selection methods to stabilize trait expression and create more predictable cultivars.

Genotype selection is foundational to developing stable F1 hybrids, maintaining breeding lines with hidden recessive traits, and avoiding undesirable genetic combinations that may express in later generations. Cannabis breeders use genotype information to select for complex polygenic traits like cannabinoid ratios and terpene complexity that cannot be fully assessed visually.