You don't seem to have much knowledge about fish genetics.
Any idea what the return rate is on hatchery/wild breeding fish?
If you guessed zero then your not very far off.
So what do suppose the return rate is on the F2 generation?
It is also near zero, so how on earth can you make those kinds of ridiculous statement about fish genealogy, when it's fairly clear you don't really know much about it at all.
That's the problem, it's a frigging black hole every time a hatchery fish breeds with a wild, nothing comes back.