Polygenic Terpene Inheritance

Polygenic terpene inheritance refers to the expression of aromatic compounds controlled by multiple genes rather than single-locus traits. Unlike simple Mendelian traits, terpene profiles emerge from complex interactions across numerous genomic regions, each contributing small additive effects to the final volatile composition. This polygenetic architecture explains why offspring often display terpene ratios intermediate to their parents, and why phenotypic variation can be substantial even within stable, inbred lines. Lineage records frequently report that strains with complex terpene signatures—such as those combining limonene, myrcene, and pinene—often reflect polygenic control. Understanding polygenic inheritance is critical for breeders attempting to stabilize specific aromatic profiles across generations, as selection pressure must target multiple loci simultaneously.

Breeders working with polygenic traits typically employ multi-generational selection and progeny testing to identify and concentrate favorable terpene alleles. Stabilizing polygenic terpene profiles requires larger population sizes and longer breeding cycles than single-gene traits, but allows access to complex aromatic diversity.