aroidgrower

Well last year I tried to breed Basjoo with velutina. I had 2 week old Basjoo frozen pollen put on velutina. I had hit most the flowers for a few weeks time. The only real problem it seemed was I did the cross late in the year and the bananas did not have a good time rippening during the cold spells.
This year I planted the seeds and I have literally hundreds of bananas sprouted. Most of these are under 1 inch tall.

Now my question to the group. How can I or will I be able to know if the hybrid took and that this is just now velutina self pollination which it seems to easily do? I am hoping their maybe something to look for in the leaf stem or trunk that might show a sign of it being a hybrid rather than waiting for it to mature and flower.
In some of my Alocasia hybrids and Colocasia hybrids the leaves are usually thicker and have more texture under the leaves. Are their any signs I might should keep a eye out for to see if it had took?