Hi Solboard. Your lamented pear may have been grafted onto any of several rootstocks, but I'm assuming that it was a pear -it might have been a quince. Did the sprouted rootstock ever set fruit, and if so what were they?

There was lately a discussion of grafting pear to apple and apple to pear on the Fruit and Orchards Forum. There has been some succes grafting pear to apple using Banana apple as an interstem. I don't know that it works the other way. But JoeReal and others comment extensively and from broad experience over there. Here's a link to that discussion. It's worth your time.

Good luck and have fun,

Mark

Here is a link that might be useful: m/forums/load/fruit/msg0301512521543.html?2

I successfully grafted a Bartlett cutting to the rootstock two years ago. It started off very slow, but this year it grew another six inches and it's starting to bud. The rootstock never flowers nor fruits. Only pear-like leaves.