Myrcene Terpene Expression

Myrcene terpene expression refers to the prominence of myrcene as a volatile compound in cannabis flower and leaf material. Myrcene is one of the most abundant terpenes across the cannabis genome, commonly associated with earthy, herbal, and clove-like aromatic profiles. Lineage records frequently report elevated myrcene in indica-descended and hashplant genetics, though expression varies significantly across phenotypes within single crosses. Breeders distinguish between chemotypes by measuring myrcene concentration relative to other major terpenes like limonene and pinene. Environmental factors—including temperature, light spectrum, and harvest timing—influence myrcene volatilization and final expression levels in cured material.

Breeders working in sedative-profile categories often select for myrcene-dominant chemotypes as part of broader terpene stacking strategies. Conversely, cultivars bred for energetic profiles typically show lower myrcene relative to limonene or pinene, making myrcene expression a measurable selection criterion in crosses.