F2 F3 Selection

F2 and F3 selections represent successive generations of inbred line development in cannabis breeding programs. F2 plants are the second filial generation, produced by self-pollinating or crossing F1 hybrids, which segregates recessive traits and increases genetic variation within offspring. F3 represents the third generation, where continued selection pressure begins stabilizing desired phenotypes across the population. Breeders working in these generations document trait expression patterns, identifying which characteristics breed true and which remain unstable. This multi-generational approach forms the foundation for creating stable cultivars and exploring genetic diversity within established crosses. F2/F3 work is foundational to modern strain stabilization and the development of IBL (inbred line) genetics.

F2 and F3 selections are essential for trait mapping, phenotype stabilization, and identifying breeding stock with consistent expression of target characteristics. Breeders use these generations to select against undesirable recessive traits while concentrating desired genetic markers for use in future crosses.