Genetic Sex Determination

Genetic sex determination in cannabis refers to the chromosomal mechanisms that establish male, female, or hermaphroditic phenotypes during plant development. Unlike many plants with environmental sex determination, cannabis relies primarily on XY chromosomal systems, though epigenetic and environmental stressors can influence phenotypic expression. Breeders studying this trait examine how sex chromosomes segregate through crosses, affecting seed ratios and stability in breeding lines. Understanding sex determination is foundational for producing reliable female-only (feminized) seeds or maintaining stable dioecious breeding stock. This trait is not a terpene in the aromatic sense, but rather a genetic regulatory system that interacts with plant biochemistry and terpene production across male and female phenotypes.

Breeders leverage sex determination knowledge to develop feminized seed lines, stabilize breeding populations, and select for phenotypic consistency. Detailed mapping of sex-linked traits helps identify potential linkages between sex chromosomes and cannabinoid or terpene expression patterns.