Trace Compound Expression

Trace Compound Expression refers to the detection and phenotypic manifestation of minor cannabinoids and terpenes present at levels below 0.1% in cannabis plant material. These compounds—including cannabinoids like CBDV, CBGA, and THCV, as well as rare terpenes—are often studied through advanced analytical methods such as GC-MS and LC-MS. Breeders and researchers classify strains by their trace compound profiles to understand genetic diversity and stability across generations. Expression of these compounds appears to be controlled by multiple genetic loci and environmental conditions during cultivation. Documentation of trace compound profiles helps establish chemotype consistency and informs breeding decisions for specialized applications.

Breeders working in this category use trace compound profiling to select for novel chemotypes and to stabilize minor cannabinoid expression across seed populations. Selective breeding for specific trace compound combinations can differentiate cultivars and support targeted research into lesser-studied cannabinoid and terpene interactions.