On Sun, 07 Mar 2021 08:37:00 -0500, Boron Elgar wrote:

> I save tomato seeds from year to year [...]
> Some varieties breed true, others [...]
> with interesting results.
>
> [...] I got some terrific fruits

Be wary of Nightshade. They look (& apparently taste) like a sweet tiny
cherry tomato. I'm not sure how much as adult can eat, but a few can kill
a small child, especially if not quite ripe.

I thought they could interbreed with tomatoes, but I just checked and the
concensus opinion seems to be 'unlikely'.