My understanding is ...
Brand names can be protected with Trademarks.  
GMOs can be protected by patents.  
Marijuana-laced lozenges, plant-breeding techniques and methods for making pot-spiked beverages can be patented.  
"Unlike European patent law, which prohibits patents on inventions considered “contrary to public order or morality,” U.S. patent law is amoral and nonjudgmental."
But a patented GMO might be genetically "tweaked" by someone else, so that it is not longer covered by the patent.
Enforcement is always the challenge.