Genetic Polymorphism

Genetic polymorphism in cannabis refers to natural variation in the DNA sequences of terpene synthase genes and other aroma-producing loci across different individuals and populations. Rather than a single aroma itself, polymorphism describes the heritable basis for why phenotypically identical plants can produce markedly different terpene profiles. Breeders and geneticists recognize this variation as fundamental to cannabis diversity: the same cultivar grown under identical conditions may express limonene-dominant, myrcene-dominant, or pinene-dominant profiles depending on allelic combinations inherited from parent plants. Understanding these genetic variants helps explain why traditional breeding lines often stabilize around preferred aroma phenotypes over multiple generations. This concept bridges molecular genetics with observable terpene expression, making it essential for selective

Breeders leverage knowledge of polymorphic loci to predict and select for desired terpene profiles in offspring. By understanding which genetic variants code for higher expression of target terpenes, cultivators can make informed crosses to concentrate desirable aroma traits across generations.