Terpene Phenotyping

Terpene phenotyping is the practice of identifying and classifying the volatile aromatic compounds (terpenes) expressed by individual cannabis plants or cultivars. Rather than a single terpene, phenotyping examines the complete terpene profile—the blend, ratio, and concentration of compounds like limonene, myrcene, caryophyllene, and pinene. This analytical approach is foundational to modern cannabis breeding, allowing cultivators and researchers to document chemical variation within strain families and across generations. Phenotyping relies on laboratory techniques such as gas chromatography or headspace analysis to create reproducible chemical fingerprints. Understanding terpene phenotypes helps breeders select parents with desired aromatic and chemical characteristics for targeted crossing programs.

Breeders use terpene phenotyping data to identify plants with stable, heritable terpene profiles suitable for commercial cultivation or specific breeding goals. Consistent phenotyping across multiple generations enables the stabilization of chemotype traits and informs decisions about which plants to preserve, cull, or cross for trait enhancement.