Anthocyanin Expression Phenotypes

Anthocyanin expression phenotypes describe the genetic potential for purple, blue, and red pigmentation in cannabis plant tissues. These water-soluble pigments accumulate in leaves, bracts, and flowers when specific genetic factors align with environmental conditions—particularly cooler temperatures during flowering. Anthocyanin production is controlled by multiple genes and does not indicate cannabinoid content or potency. The visible coloration ranges from subtle purple undertones to deep violet or maroon, depending on genotype, cultivation conditions, and plant maturity. Understanding anthocyanin phenotypes helps breeders select for specific aesthetic traits and track genetic lineages across breeding populations.

Breeders often select for or against anthocyanin expression as a visible marker trait, since the phenotype can indicate genetic background and stability in breeding lines. Consistent anthocyanin expression across generations helps document lineage integrity and aids in phenotype stabilization efforts.