I always found grafting fascinating, and I am now picking this again. I was wondering about which trees I can do grafting/combine.
Is there a table that I can refer to?
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So far as I'm aware, there is no complete table displaying which plants can be grafted onto which plants. It's a bit of a broad question for such a specialist area, but broadly, most plants need to be grafted onto something within their own Species, or, less common but possible, within their own Genus, and for a few, something in the same Family will work. It's probably fair to say that not all possible combinations of plants will have been tried - breeders and growers generally use grafting to produce a plant for market for a specific purpose, such as dwarfing, increased fruiting, increased vigour at a smaller size, and so on, and this ultimate aim would, to some degree, have restricted the plant choices they made.
This link gives general advice on grafting and some guidance on the subject of your question under 'How to Graft' https://www.rhs.org.uk/advice/profile?PID=443