I agree with KarenO. If you started 20 and none are PL, then something is amiss.
A PL crossed to an F1 that has a PL parent should throw PL plants at about 50%. There is almost no chance that you got zero out of 20.
There have been a lot of helpful responses, but if you aren't happy with your results, this is the best advice if you back up to the F2s, assuming you are still convinced the original cross was correctly labeled:
Quote:
Originally Posted by Fusion_power
Charlie, in the cross you mention, it is simple to do the selection needed. Grow the F1 plant from crossing a PL pink to a RL Gwr. Save the seed and then grow a boat load of F2's the next season. Keep only the PL seedlings. By growing only the PL F2's, you can pre-select and focus effort on finding the recessive color combination. Set out at least 32 of the PL plants and 1 or 2 of them should be a nice Gwr tomato. There will be a few other Gwr's among them, but not so good flavored so you can cull them.
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