Cbd Suppression Traits

CBD suppression refers to genetic traits that result in low or undetectable cannabidiol production in cannabis plants, despite the presence of CBD synthase genes. This occurs through various mechanisms including transcriptional silencing, epigenetic modification, or competitive metabolic pathways favoring THC production over CBD. Lineage records frequently report CBD suppression in many modern cannabis varieties bred for high-THC potency over several decades. Breeders working in this category have often leveraged these traits unknowingly through selection pressure, as plants with strong THC expression sometimes display reduced CBD accumulation. Understanding the genetic basis of CBD suppression is relevant for breeding programs seeking to recover or maintain specific cannabinoid ratios.

Breeders targeting high-THC chemotypes regularly encounter CBD suppression traits in their germplasm. Recovering CBD production in THC-dominant lines requires identifying and selecting for recessive alleles that restore CBD synthase expression or metabolic allocation.