Meiotic Irregularity

Meiotic irregularity refers to abnormalities in cell division during gamete formation, resulting in unbalanced chromosome sets in pollen or ovules. In cannabis breeding, this phenomenon can produce polyploid offspring (triploids, tetraploids) or aneuploid plants with unusual chromosome counts. Breeders have observed meiotic irregularity arising spontaneously in some lineages, particularly in stress-induced or hybrid contexts. Documentation of these events remains limited in peer-reviewed cannabis literature, though horticulturists working with stable diploid lines occasionally report unexpected ploidy shifts. Understanding meiotic behavior is foundational for predictable seed production and identifying stable breeding populations.

Breeders studying meiotic irregularity seek to either stabilize or intentionally induce polyploidy for trait enhancement, though the trait is often considered undesirable in commercial seed production due to reduced fertility or genetic instability. Controlled monitoring of chromosome behavior helps identify which crosses or environmental stressors trigger irregular meiosis, informing selection st