Yes, even tomato plants covet their neighbor's wife...with a little help from that devil of a bee.
And forget about replicating this year's tomato garden next year if you are growing hybrid tomatoes. A hybrid tomato is made by crossing several different parent varieties. Even if grown in isolation, second generation hybrid tomato (and pepper) seeds usually do not come back as the same variety. You'll have to buy fresh seed next year to duplicate that exact hybrid tomato experience.
Plus, hybrid varieties of tomatoes offered for the home gardener have been bred for many of the same characteristics as the varieties grown by large agricultural interests: higher yields, disease resistance and broader climate adaptibility. As one study from the University of Texas suggests, the formation of nutrients in hybrid tomatoes for the home market may also be the sacrificial lamb in order for that plant to pump out a greater number of tomatoes.
Isolate your favorite heirloom tomato plant from other varieties to avoid possible cross pollination. Plant them by themselves about 30 feet away from other tomatoes. Not enough room? Surround the heirloom tomato plant with other tall growing vegetables, such as corn or pole beans.
Stir it once or twice a day for a day or two, and then pour or scoop off the scum at the top of the container. This floating material will contain tomato chunks and the bad seeds.
Then, add more water to the container and pour it through a screen or strainer. You may need to do this more than once or twice. It's just like panning for gold. Your treasure? Those nice, plump, healthy tomato seeds that will remain behind.
Here's a video of how to save tomato seeds: