Cultivar Selection

Cultivar selection refers to the deliberate identification and propagation of cannabis plants exhibiting desirable phenotypic or genotypic traits across multiple generations. Rather than a single genetic family, cultivar selection encompasses the breeding methodology breeders use to isolate and stabilize preferred characteristics—whether related to plant structure, terpene profiles, vigor, or flowering patterns. Historical cultivar development often involved selecting individual plants from larger populations, then breeding them back to themselves or to complementary genetics. Modern cultivar selection increasingly relies on phenotypic observation combined with genetic testing to confirm heritability. This foundational practice has produced most named strains available today, each representing breeders' choices about which traits to stabilize and maintain.

Cultivar selection is the core mechanism by which breeders create, stabilize, and document distinct varieties. Consistent selection across 3–6+ generations typically fixes desired traits, allowing breeders to register and reproduce stable cultivars reliably. Understanding selection pressure and phenotypic variation is essential for any breeding program aiming to develop new strains or maintain gen