You would have to go half way down to a HOS post "Wed Mar 17, 2010 1:04 pm" to get more on the full story on that combination;
[url:26yboskj]http://www.homeorchardsociety.org/forums/viewtopic.php?f=1&t=4025&start=0[/url:26yboskj]

I have done something similar myself using pear on WB on M26 with the pear grafted 4 feet high. In that location the pear had every opportunity to compete one on one with other apple spurs but the apples won out and the pear remained very much a spur. The pears remained much smaller.

The other way I used this same pear grafted close to the ground on a Quince "C" rootstock. This was at least 10 years ago and it remains almost topped out at 6 feet tall. The fruits size up better than the above example so I prefer this one on quince even though I find suckers now and then at the crown of the tree.

The scion I used must be a hybrid since it is a pear in the fruit and the tree has the appearance of asian bigger scab resistent pear leaves and because it was seed collected from an asian pear breeding program, open pollinated. I have seen reliable reports having asian pears grafted to quince with good unions which result in a "very" dwarfing tree (2 feet tall).

Asian pears are listed to grow on vigorous rootstocks like the species pyrus betulafolia for any kind of a shade tree.

Hybrids of two species crosses might be regarded as pear in vigor due to "hybrid vigor"; Which is why I guess is another reason I think I have asian x "pear (praternal parent OP)". The original tree grows rapidly as well.