Interesting mentioning the hops but I thought this has already been well documented to have been tried and failed many many times.
Hackberry, however, has recently been discovered to be part of the Genus Cannabaceae and I don't know of anyone who has tried grafting to a Hackberry yet. However, if breeding through seeds were possible, I suspect that it would have already occurred in the wild if it was feasible.
you're correct, and tried hard too, just like the 70's guys trying to use heat lamps and blacklights to grow, and failed. Today is a new day though. In vitro culture exactly like this is being done in citizen science labs(closets) all over the world. Only in the last 100 years did science move all the study out of your hands and into the profit machines.
These unions of different genus material are routinely paired, electrically, chemically, and mechanically. Chemical is the only affordable method to me, available, cheap and worked well when I practiced. The reason there is little mention of this is because everyone of these procedures hold patents, and are rented to flower producers, etc. patent infringement can be punished like treason today. Plus, dozens of patents for this exact subject have already been granted, and are jointly owned, by.......
The army has sprouts that bioluminesce in the presence of tnt contituents, I've worked with those sprouts, they are real. There are plants producing human replacement tissue, warfare toxins, many synthetic drugs, and more.
I have seen bioluminescing christmas trees, (soon to be released), (and a bioluminescing mj plant.) with plans of planting along roadsides instead of lights. this shit is real, don't be scared though, our Monsanto has it wrapped up, with the help and financing, of It's government.
Take a look at Morgellons, if you're curious of the impact of their research. They have successfully integrated plant material into the human genome, via GMO and the bacterium and antibiotics used in the pasture. and it is operating now, actually an epidemic.
dont kill the messenger, I dont want to argue, or debate, and google has all the answers, because this is all I know.