You just never know until they grow.
Yesterday I started ten tomato plants, seeds indoors, and some moon flower seeds. Gardening starts late around here, southern Montana. But I scored some Walla Walla live starts And might put them in the ground this weekend.
Back in 2018 and 2019 one of my buddies tried to grow CBD hemp. The first year he just threw the seeds out to see what would happen, didn't invest much in the seeds. The seeds he got were from some lab in Canada, there were so many different looking plants that we deduced they must have swept up the lab floor and sent that. I didn't get involved until he was beginning to harvest that crop. The next year he made me foreman and i was out there plotting the irrigation ditches with the civil engineer and planting seeds myself. It was a major course in agriculture on a seven acre plot! Holy cow. The crop was unbelievable. Looked and smelled like high grade marijuana, the plant became huge trees with more kolas than you could count, yellow, pink haired buds. Hard to believe it wasn't pot. I also learned that in a crop setting, you can removed all the male plants you can find and the next day, there's a whole shitload more. Why? Because cannabis will change sexes all by itself. Those girls will grow pollen pods right above the buds and pollinate themselves to produce seeds! You can imagine our dismay when this discovery was made. We had considered it a possibility but when it proved to be real, we were not happy farmers.
The experience was more than I expected but enriching all the same. And I got to spend all my days in one of the most fantastic places on the continent as well. I made friends with two pair of Merlins who nested on the property and learned that deer don't like the really strong stuff, they stopped eating it after it was knee high. And don't sleep in a tent in bear country, even with bear spray... though I already knew that.
Anyway, hybrids don't reproduce well if at all, it's the nature of their creation so to speak. If you can get a few plants to go a generation or two, you might be able to come up with more viable seeds in a third gen seed. That may work but it might not, too.
ETA: