Genotype By Environment Interaction

Genotype-by-environment interaction (G×E) describes how a cannabis plant's genetic potential for aroma expression varies depending on growing conditions. The same cultivar grown in different temperatures, humidity levels, light spectra, or soil compositions may produce noticeably different terpene profiles. This phenomenon is central to understanding why identical genetics can yield distinct aromatic outcomes across regions, seasons, or cultivation methods. Breeders and growers recognize G×E as a critical factor when selecting parents for stable aroma traits or when standardizing production protocols. Documentation of G×E effects helps explain phenotypic variation within seed batches and informs expectations for clone stability.

Breeders studying G×E focus on identifying genotypes that express consistent, desirable aromas across multiple environments—a trait valued for commercial seed lines and cultivar stability. Understanding G×E interactions allows breeders to select parents less prone to environmental drift, improving predictability in breeding programs and seed production.