Sex Determination Cannabis

Sex determination in cannabis refers to the genetic and developmental mechanisms that establish male, female, or hermaphroditic phenotypes in the plant. Cannabis is typically dioecious, meaning individual plants develop as either pollen-producing males or seed-producing females, though environmental stress or genetic predisposition can trigger hermaphroditic expression. Understanding sex determination is foundational to breeding programs, as breeders must reliably identify and select for female plants to produce seedless flower or maintain breeding stock. Genetic markers and chromosomal studies have identified XY sex determination systems in cannabis, though phenotypic expression remains influenced by environmental factors like photoperiod, temperature, and nutrient stress. Early and accurate sex identification tools—from morphological observation to molecular testing—are critical for co

Breeders working in controlled breeding use sex determination knowledge to stabilize female-biased or all-female cultivars, and to develop feminized seed lines through targeted pollen inversion techniques. Understanding the genetic basis of sex determination also informs selection strategies for dioecious breeding programs and helps identify genotypes resistant to unwanted hermaphroditism.