Most hybrid seeds will germinate but there are a few exceptions. The issue isn't germination. It is the fruit the resulting plant produces. It usually isn't true, isn't the same fruit you originally grew as the plant reverts to one of its parent stock. Again there are some exceptions but that is why most only save seeds from what are called "open-pollinated" varieties since unless they are cross-pollinated they will breed true..

So just because your seed sprouted doesn't tell you if it was from a hybrid tomato or not. And there are many varieties of "beefsteak" tomatoes, both hybrids and open-pollinated so your beefsteak could easily be a hybrid too.

Since you already saved your mixed seeds and planted them then all you can do is let them grow and produce and see if you like whatever fruit they produce. Personally I would never waste the time and space growing out some unknown seed but some would disagree. Only you can determine if it is a waste or not.

Dave

The only plants I grew was Beefsteak and Better Boy Hybrid so it would have to be one of them or could I get total something different.

Thanks

Brandy Boy is one of the exceptions. I'm now on F12, and they are still true.

John A

"The only plants I grew was Beefsteak and Better Boy Hybrid so it would
have to be one of them or could I get total something different."

Yes you could get one of the parents of either of those varieties or a cross-pollinated variety of the two. If you bought a pack of Burpee seeds labled "Beefsteak" then there is no way to be sure that it too wasn't a hybrid as they changes names at will sometimes. Otherwise the term "beefsteak" is just a type of tomato, not a variety, and comes in many different varieties. The real name of the original "beefsteak" tomato was Crimson Cushion but it is also sold as Red Ponderosa. So its stability is inconsistent.

Better Boy is a fairly stable hybrid IME but can still deviate. If seed saving is your primary goal then go with the well known open-pollinated varieties (aka 'heirlooms') or look for the really stable hybrids. The alternative is bagging blooms and several seasons of selection for traits as has been done with Brandy Boy, Rutgers, Big Beef, Whopper, and some others.

Dave

Amen John.

I know another one : KUMATO.

It is not retailed either as seed or plant. Only grown commercially for supermarkets.I got my seeds from store bought tomato. I grew it last year. It was a carbon copy. I will grow F3 this year.

So the point is that , seeds saved from a hybrid can be IFFY. There is a slight chance that you might get the same. But heck, you will get some tomatoes that are decent. For example they cross Brandywine and Rutgers and get Jersey Boy (F1), so if you plant seeds saved from Jersey Boy you are going to get some name brand tomatoes, Rutgers, Brandywine, Jersey Boy. .

Sey

Okay thanks for all the information. I have seed that Im planting other than them. Rutgers, Black Krim, Cherokee Purple, Roma, Early Girl, Juliet. I may keep a few of them plant just to see how they do.

Thanks Again!!

You can save the seeds from Rutgers, Black Krim, and C. Purple with no concerns. The others can be iffy to use Sey's term.

Dave

John - I'm going to save seeds from Brandy Boy this year and see if I have success like you have ! That will be a good test to see if Brandy Boy is true for me also !