Segregation Patterns

Segregation patterns describe how traits distribute across offspring generations when cannabis plants are crossed. Breeders observe these patterns to understand which traits are dominant, recessive, or sex-linked, and to predict phenotypic outcomes in F1, F2, and subsequent generations. Classical Mendelian segregation (3:1 ratios in F2) appears in single-trait crosses, while complex traits involving multiple genes show more varied distributions. Understanding segregation is essential for stabilizing desired characteristics and eliminating undesirable ones through selective breeding. Cannabis research has documented segregation in morphology, cannabinoid ratios, and terpene expression, though definitive genetic mapping remains limited due to regulatory constraints.

Professional breeders use segregation data to select parents, predict line stability, and accelerate the development of true-breeding cultivars. Tracking segregation across generations helps identify homozygous versus heterozygous individuals and informs decisions about backcrossing, selfing, or line selection.