If I'm very fortunate a few of the plants might have edible fruit.
Hybridizing very hardy citrus that is truly good eating quality is going to take a long time.
I would count yourself lucky if you are able to achieve a hybrid that can survive in your winters and doesn't have poncirus bitterness, even if it might not be good fruit quality.
Perhaps someone in the future could later take your achievement and use it to hybridize a better hybrid in the future.
Incremental progress. If you achieve a significant improvement, even if it might not be what you had hoped for, don't throw it away.
As always, we have similar goals but are using different methods. So far you have guessed right more than I have. I have learned much from your results and modified my plans for the better. Many thanks.
That said, I will be bringing in new breeding stock of pure citrus.
I'll use Flying Dragon X Seedless Kishu. Flying Dragon as it is my oldest P. trifoliata that gives a good percentage of zygotic seeds. Seedless Kishu for its dominant gene for seedless.
I want to use Flying Dragon X Blood oranges. Blood oranges have been said ,elsewhere on this forum, to have no sourness. While I want some sourness in my citrus fruit, all my 1/2 and 1/4 Pt hybrid fruit are much too sour. IF the "no sour" in blood oranges is due to a single gene, then F2 Flying Dragon x Blood might include no sour or less sour fruit. I think that (Clem x tri) x Clem juice mixed with a no sour trifoliata hybrid juice might give a good drink.
Also, as I've said elsewhere, I'd like to remake all the citrus X P. trifoliata crosses using Laaz's precocious P. t and using P.t like Poncirus+.
If anyone has the trees to make any of these crosses, but no room to grow them out, make the crosses and I'll make room for the seedlings. And I'll share budwood as soon as possible.