Reproductive Genetics

Reproductive genetics in cannabis refers to the inherited traits governing plant sex determination, flowering timing, and seed production capacity. Cannabis displays environmental and genetic sex determination, with most cultivated strains exhibiting distinct male and female phenotypes, though hermaphroditic expressions occur. Breeders track reproductive genetics to stabilize photoperiod-dependent or autoflowering traits, control seed viability, and predict flowering windows across generations. Understanding pollen viability, female flower density, and seed set consistency helps breeding programs achieve reproducible cultivar characteristics. Reproductive genetics also encompasses studies of genetic stability across generations and trait expression under varying environmental conditions.

Commercial breeders select for consistent female-only phenotypes (feminized lines), stable autoflowering triggers, and reliable seed production. Mapping reproductive traits enables predictable F1 hybrid vigor and helps identify germline markers for sex and flowering type before crop deployment.