Cbg Chemotypes

CBG chemotypes are cannabis varieties bred to express elevated cannabigerol (CBG) levels—often 1% or higher—rather than the THC or CBD dominance seen in most modern cultivars. CBG functions as a biosynthetic precursor to THC, CBD, and CBC in the plant's chemical pathway, making CBG-rich strains genetically distinct. Breeders isolate and stabilize these chemotypes through selective crossing of parent plants expressing the enzymatic traits that favor CBG accumulation over downstream cannabinoid conversion. CBG chemotypes remain relatively rare in cultivation compared to THC or CBD-dominant varieties, reflecting limited breeding work in this category. Understanding CBG chemotypes requires attention to genetic markers and terpene profiles, as chemotype expression can vary across growing conditions.

Breeders working in CBG chemotypes target specific genetic markers associated with reduced cannabinoid synthase activity—the enzymes that convert CBG into THC and CBD. Stabilizing CBG-dominant lines typically requires multi-generation selection and careful backcrossing to preserve the desired enzymatic pathway while maintaining viable plant vigor and yield.