Tetraploid Cannabis

Tetraploid cannabis refers to plants with four complete sets of chromosomes (4n), compared to the typical diploid (2n) condition. This chromosomal doubling occurs naturally in cannabis but can also be induced in breeding through colchicine treatment or spontaneous mutation. Tetraploid lines have been documented in both hemp and cannabis breeding programs, though they remain relatively uncommon in commercial cultivation. The genetic redundancy in tetraploid genomes can produce larger flowers, altered cannabinoid profiles, and modified terpene expression in some lineages. Breeders working with polyploidy have reported increased vigor in certain backgrounds, though tetraploid plants often display reduced fertility and may require specialized propagation techniques. Research into tetraploid cannabis genetics remains limited compared to diploid breeding work.

Tetraploid genotypes are primarily explored in specialized breeding contexts where breeders seek novel trait expression, hybrid vigor, or phytochemical variation. Their reduced fertility and genetic complexity make them challenging to work with operationally, limiting adoption in mainstream seed production.