Informal Selection

Informal Selection refers to cannabis genetics developed through unstructured, non-methodical breeding practices rather than deliberate trait targeting. This category encompasses landraces, heirloom varieties, and generational grows where selection pressure was applied casually or incidentally based on grower preference rather than documented goals. Many historical cannabis populations worldwide emerged through informal selection, resulting in genetically diverse and often locally-adapted plants. Unlike formal breeding programs that isolate traits across controlled crosses, informal selection maintains broader genetic variation and can produce unpredictable phenotypic expression across seeds from the same line. Understanding informal selection genetics is important for seed banking, heritage preservation, and recognizing the origins of many modern cultivars that trace back to these loose

Modern breeders studying informal selection lines often use them as genetic reservoirs for novel trait discovery and outcrossing programs. These populations provide broad trait variation and potential resilience markers that formal monocultures may lack, making them valuable for expanding breeding baselines.