From: (Beverly Erlebacher)

As another unnatural effect of domestication, some apple cultivars are
triploid, and produce nonfunctional pollen. I've occasionally wondered
whether there are triploids with nonfunctional ova, but good pollen, but
we never hear about them because nobody wants an apple tree that doesn't
produce apples, no matter how good the pollen is. Come to think of it,
people do seem to want fruitless fruit trees as ornamentals. Maybe there'd
be big bucks in a fruitless ornamental crabapple. No squashed rotten
crabs tracked into the house, or people slipping on them and suing you.


More often when plants have triploids, the result is no seeds in the fruit.
Examples are seedless grapes and seedless bananas.

Sean



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