Polyploid Terpene Segregation

Polyploid Terpene Segregation refers to the complex expression patterns of aromatic compounds that emerge when cannabis plants carry multiple sets of chromosomes (polyploidy), most commonly triploidy or tetraploidy. In polyploid organisms, terpene biosynthetic genes can be present in unequal copy numbers across chromosome sets, leading to unpredictable ratios of limonene, myrcene, pinene, and other volatile compounds across offspring and even within individual plants. Breeders working with polyploid lines frequently report altered monoterpene and sesquiterpene profiles compared to diploid parents, though expression remains difficult to predict. This trait family is relevant primarily to advanced breeding programs exploring chromosome manipulation as a path to novel aromatic diversity, rather than conventional selection.

Polyploid cannabis lines are occasionally employed in controlled crosses to interrogate terpene heritability and to generate segregating populations with atypical volatile ratios. Understanding how polyploidy affects terpene expression helps breeders distinguish between genetic and epigenetic drivers of aroma, and informs decisions about whether to stabilize polyploid lines or backcross to diploid