In my whirled, PCR has stood for polymerase chain reaction since before that LSD inspired idea won its inventor a Nobel 
Published data indicates that the phyto-cannabinoids associated with seeds are generally contamination from their previous location inside the cannabinoid rich female inflorescence.
Edit: if you insist on seed borne phytocanabinoids, there are both traditional and non-traditional breeding methods that could be applied.
Although moving the pathways so as to get cannabinoids in MCT directly from coconuts seems like at least as much fun 