Cannabinoid Chemotype

Cannabinoid chemotype refers to the distinctive profile of cannabinoids produced by a cannabis plant, determined primarily by its genetics and secondarily by growing conditions. Major chemotypes are commonly categorized by their dominant cannabinoid: THC-dominant (Type I), CBD-dominant (Type II), or balanced THC/CBD (Type III), with rarer chemotypes producing high CBGV, THCV, or other minor cannabinoids. Chemotype classification emerged from academic cannabinoid research and is now foundational to breeding programs, regulatory testing, and seed selection. Understanding chemotype helps breeders predict offspring cannabinoid ratios and enables cultivators to select genetics matching their cultivation goals.

Breeders use chemotype data to selectively cross parents with known cannabinoid profiles, aiming to stabilize desired ratios in F1 and subsequent generations. Chemotype stability—how consistently a line produces its target profile across environments—is a key breeding metric and determines whether a cultivar can reliably deliver its documented cannabinoid composition.