Pollination Genetics

Pollination genetics encompasses the heritable traits and mechanisms controlling pollen viability, flower structure, and reproductive compatibility in cannabis. Breeders classify plants across spectra of male fertility, female flower development, and sexual expression patterns—from strictly dioecious (separate male/female plants) to monoecious or hermaphroditic phenotypes. Understanding pollination genetics is foundational for controlled breeding, as it directly determines whether seeds will be produced, how many, and what genetic combinations result. Historical landraces and modern cultivars display varying degrees of reproductive stability; some lineages consistently produce viable pollen while others show reduced or conditional fertility. Seed companies and breeding programs document pollination traits to guide parent selection, predict offspring sex ratios, and maintain breeding line

Breeders actively select for or against specific pollination phenotypes depending on their goals: feminized seed production requires knowledge of sex reversal genetics and pollen viability, while regular seed breeding demands stable male and female parents with predictable fertility. Understanding pollination genetics also helps breeders avoid accidental hermaphroditism or unwanted seed set in cul