I forgot to mention upthread that a friend told me a few days ago that he’d seen “Golden Jubilee” tomato plants @ Menards last year. That may be my “mystery” tomato plant! Burpee evidently carries the seeds and my friend says he still has a Burpee plant label, so, they must have also had them in 6-packs too. (Rarely would he or I buy 4” round pots of tomato plants.)
All attributes look correct, except the flavor described as “sweet”, “mild”, “low acid”, and “tangy”. I would agree with the “sweet and tangy”, though I’m trying to figure out how “tangy” goes with “mild” and “low acid”.
Golden Jubilee is a heirloom breed, so, I believe these plants from seeds I collected should “grow true”, correct?
The seeds are not expensive on Amazon, but, this late I’d be worried about them cooking on a UPS truck. I got excellent germination from the seeds I collected, so, I’ve no need to order any, anyway. :-)
That's my understanding.
One thing that you do have to watch for though is accidental cross pollination if you grew other varieties nearby.
“Golden Jubilee is a heirloom breed, so, I believe these plants from seeds I collected should “grow true”, correct?”
Saving seeds from Heirloom plants (also called, ‘Open Pollinated’) gives you better success than saving seeds from hybrid varieties, which will revert back to the male or the female plant used for hybridizing. You’ll still get seeds, but with only half the qualities from the hybrid.
And, you can still get some cross-pollination with Heirlooms unless you are using cages or row covers over your plants to keep the bees and other insects from going from one tomato plant to another and pollinating everything in between.
I found good info here on the subject:
https://laidbackgardener.blog/2017/06/03/how-to-keep-vegetables-from-cross-pollinating/