Darn, when I wrote Magness was a triploid I almost fact checked it, not quite trusting my memory. I guess I made that leap because all my fastest growing apples are triploid and I'm well aware that Magness can't be used as a pollinator and it is just about my fastest growing pear.
[NAFEX] Magness not a triploid,
Alan Haigh, 11/03/2008