Mep Pathway

The MEP pathway (methylerythritol phosphate pathway), also called the non-mevalonate route, is a biochemical process in plants that produces isoprenoid precursors—foundational molecules for terpene synthesis. In cannabis, this pathway operates alongside the mevalonate pathway to generate the diverse terpene profiles observed across cultivars. Breeders and researchers track MEP activity as part of understanding how genetic background influences aromatic compound accumulation. The pathway's efficiency and regulation contribute to variation in terpene diversity and concentration, making it relevant to breeding lines selected for distinct chemotypes. Documentation of MEP-pathway-associated genes remains limited in cannabis literature, though the mechanism itself is well-characterized in model plants.

Breeders working toward specific terpene profiles or chemotypes benefit from understanding that MEP and mevalonate pathways work in concert to supply building blocks for cannabinoid and terpene biosynthesis. Selecting for lines with distinct terpene expression patterns may indirectly select for differential pathway activity, though direct breeding for MEP-pathway traits remains largely exploratory