Gabe15

There is no real answer to your question unfortunately, and no way to calculate it. Being parthenocarpic is not the only useful trait, you need to look at the entire plant and everything about it. A plant may be parthenocarpic, but terrible in all other traits. And if you are just breeding for parthenocarpy and nothing else, then there would be no point, as you are starting with a parthenocarpic parent, so from the non-parthenocarpic parent you must be seeking some sort of traits from it too.

Whatever happens is highly dependent on what parents are being used, and how many seedlings you will actually be able to generate.

For something like this, I think you are looking way too far down the road and with too much expectation, see if you can make a cross, grow seed, and generate any seedlings at all before you get caught up in thinking about technical details like this, it's a lot harder than you may think. Try generating 1 seedling before you get worried about what might be useful to consider if you manage to generate 100 or more.

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Growing bananas in Colorado, Washington, Hawaii since 2004. Commercial banana farmer, 200+ varieties.