Sex Determination Genetic Markers

Sex determination in cannabis involves genetic markers that influence whether plants develop as phenotypically female, male, or hermaphroditic. Unlike mammals with XY chromosomes, cannabis sex determination remains incompletely mapped, though research suggests polygenic inheritance with environmental modulation. Breeders and researchers use molecular markers and cytogenetic approaches to study sex-linked traits and predict flowering phenotypes. Understanding these genetic systems is foundational for breeding programs targeting uniform female populations, which are conventionally preferred in commercial cultivation. Current evidence indicates multiple chromosomal regions contribute to sex expression, and epigenetic factors may also play regulatory roles.

Breeders leverage sex determination markers to develop feminized seed lines, stabilize female-only populations, and understand trait heritability linked to sex chromosomes. Molecular markers enable earlier sex prediction in seedling stages, reducing cultivation costs and improving breeding efficiency for targeted phenotype development.