I hadn’t seen this thread when I posted my possible avocado chimera in the grafting thread, but that isn’t inter-genera or even an inter-species chimera:
I do have Chaenomeles runners popping up all over my front yard from the bush my neighbor has next to the fence, so I’ve thought about grafting some of them instead of pulling them up, but wasn’t sure what to try. Since loquat is graft compatible with true quince, I was thinking I might try that. Now I want to try to create a chimera of those two!