Homozygosity Selection

Homozygosity selection refers to breeding practices focused on stabilizing genetic traits by selecting parent plants that carry identical alleles at target loci. In cannabis breeding, this technique is used to lock in desired characteristics—such as terpene profiles, growth patterns, or cannabinoid ratios—across successive generations. Breeders working in this category typically identify homozygous individuals through repeated selfing, backcrossing, or marker-assisted selection. This approach is foundational to creating stable, predictable cultivar lines that reliably express consistent traits. Homozygosity selection is distinct from heterozygosity-based hybrid vigor strategies and represents a core principle in stabilized strain development.

Breeders employ homozygosity selection to reduce genetic variation and establish true-breeding lines—essential for commercial cultivar registration and seed production. This method requires multiple generations of selection and testing to confirm trait expression and stability before release.