Polyploid Selection

Polyploid selection refers to breeding work with cannabis plants that carry more than two complete sets of chromosomes (diploid is standard; triploid, tetraploid, and higher are polyploid). Breeders have long observed naturally occurring polyploid variants in cannabis germplasm and have developed controlled techniques to induce and select for these traits. Polyploid plants often exhibit altered morphology—including larger leaves, denser growth, and modified terpene profiles—though stability and fertility vary widely. This family encompasses deliberate breeding lines where polyploidy is a tracked characteristic, distinct from standard diploid breeding programs. Research into polyploid cannabis remains limited in peer-reviewed literature, and commercial viability depends heavily on individual cultivar stability and grower environment.

Breeders working with polyploid lines typically pursue them for novel phenotypic traits, potential vigor changes, or terpene expression shifts. Polyploid selection requires rigorous phenotyping and often produces sterile or reduced-fertility offspring, making stabilization and seed production more complex than diploid breeding.