Elroy Willis wrote in message . ..


Is there a good chance that if I keep the seeds and grow some
plants from them that all the plants will be more cold resistant than
the previous generation?

To save the seeds, cut open the tomato, spoon out the goo, and put the
goo and seeds in a cup of water in a warm place. After fermentation,
you will be able to wash the goo off and dry the seeds. Then go ahead
and start your tomatoes from seed and see if they produce hardy tomato
fruits.