Sex Reversal Breeding

Sex reversal breeding is a technique where breeders induce female cannabis plants to produce viable male gametes, typically through stress application or chemical treatment with gibberellic acid. This creates functional males from genetic females, allowing breeders to work with desired female-only lineages and control parentage with precision. The resulting male flowers—often called feminized males or reversed females—produce pollen carrying female chromosomes (XX). This method has become foundational in modern seed production and selective breeding programs seeking to stabilize traits or create all-female seed lines. Sex-reversed males differ from conventional males genetically, making this a significant tool in controlled breeding rather than natural plant reproduction.

Breeders employ sex reversal to create feminized seed stock, maintain elite female genetics across generations without male plants, and accelerate breeding timelines. It enables rapid backcrossing and trait stabilization when traditional male selection is impractical or undesirable.