Viral Resistance

Viral resistance refers to a plant's capacity to withstand infection from plant viruses—a trait increasingly prioritized in cannabis breeding programs. Unlike fungal or pest resistance, viral immunity in cannabis remains an emerging area of study, with limited documented natural resistance mechanisms currently understood. Breeders working in this category typically select parent plants showing reduced susceptibility to common viruses such as Tobacco Mosaic Virus (TMV) or Cucumber Mosaic Virus (CMV), though breeding records on effective selection remain sparse. Environmental controls and cultivation hygiene remain the primary viral management tools in commercial settings. Research into viral resistance genetics in cannabis is ongoing, and claimed resistance traits should be verified against actual field performance data.

Breeders pursuing viral resistance typically focus on selecting germplasm from lineages with demonstrated field tolerance to viral infection, though reproducible markers for viral immunity in cannabis are not yet standardized. This trait carries particular value in high-density cultivation systems where viral transmission risk is elevated.