I wish you good luck. Beautiful tree, beautiful flowers, great fruit. The problem with paw paw is that the fruit don't hold long after being picked. That is why it is not commercially sold in the USA.
So, if you are looking for varieties to sell, need to find fruit with longest shelf life.
Thank you for your reply! Yes it's true, but i don't know what var are more durable. Even so we can always sell part of production locally and transform the pulp of the rest that will not be selled.
Yes, shelf life and fragility are 2 of the biggest, if not the biggest, impediments to commercial pawpaw production.
I am not aware of any cultivars that are dramatically better in these categories. research has been done on things to improve shelf life like hot-water treatment, etc, but no silver bullet has been found to my knowledge.
Firmer-fleshed varieties might be helpful. I believe Susquehanna is known for firmer texture, and I can attest to its mango-like texture in terms of eating. Not mushy/watery like many wild fruit. Other varieties purportedly are firmer too but can't recall which.
The new KSU-Benson variety is more spherical in shape which may aid in transporting/packing.
I also do not think there has been an overwhelming favorite for rootstock production. However, my experience, and that of Kentucky State in some research, is that Sunflower has vigorous growth characteristics and thus is capable of grafting sooner. The same KSU study concluded Susquehanna seedlings were poor rootstock choices.
Sunflower seeds have produced the tallest/most vigorous seedlings for me (aside from some wild seeds - in my limited experience).