Carotenoid Genetics

Carotenoid genetics refers to the heritable traits controlling pigment production in cannabis plants, primarily responsible for orange, yellow, and red coloration in flowers and leaves. These compounds—including β-carotene, lycopene, and xanthophyll—are synthesized through enzymatic pathways influenced by multiple genes and environmental factors like light, temperature, and nutrient availability. Carotenoid expression varies significantly across cultivars, with some lineages breeding for deeper orange pistils or autumn-toned foliage as aesthetic markers. Understanding carotenoid genetics is relevant to breeders working to stabilize color phenotypes and to researchers studying how pigment expression correlates with terpene and flavonoid co-occurrence. Documentation of carotenoid traits remains inconsistent across seed banks, making phenotypic observation during breeding cycles essential.

Breeders select for carotenoid-dominant phenotypes to establish consistent visual markers within a line and to explore potential links between pigment expression and secondary metabolite diversity. Carotenoid stability across generations requires multi-generational selection and careful environmental controls during seed production.