Chemovar Classification

Chemovar classification is a taxonomic system used in cannabis breeding and research to categorize plants based on their cannabinoid and terpene profiles rather than morphology alone. The three primary chemovars are Type I (THC-dominant), Type II (balanced THC/CBD), and Type III (CBD-dominant), with additional classifications emerging as analytical chemistry advances. Breeders use chemovar designation to communicate chemical phenotypes across populations, enabling reproducible selection for specific cannabinoid ratios. This system emerged from early phytochemical research and has become foundational in modern seed development, regulatory compliance, and breeding program documentation. Understanding chemovar classification is essential for evaluating genetic stability and predicting chemical expression in offspring.

Breeders select parent plants using chemovar profiles to guarantee offspring chemical expression, particularly when developing lines for specific cannabinoid targets. Chemovar classification enables standardization in breeding records and helps identify genetic mechanisms controlling cannabinoid synthesis across populations.