Actually, this is all much ado about nothing. For the last 40 or 50 years almost all crops have been grown with hybrid (crossbred) seeds. The result is that they don't "breed true" anyway - you can't save seeds and replant the next year, because the resulting plants will not have the same characteristics as the hybrid plant. You already can't sell the resulting seeds because nobody would want them, as the quality and productivity would not be the same as the commercial hybrids. The real risk (hopefully unlikely) is that if civilization collapsed, and hybrid seeds were no longer available, we mostly don't have the seed stock for self-sustaining agriculture anymore. (but see organizations like http://www.seedsavers.org/).
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Actually, this is all much ado about nothing. For the last 40 or 50 years almost all crops have been grown with hybrid (crossbred) seeds. The result is that they don't "breed true" anyway - you can't save seeds and replant the next year, because the resulting plants will not have the same characteristics as the hybrid plant. You already can't sell the resulting seeds because nobody would want them, as the quality and productivity would not be the same as the commercial hybrids. The real risk (hopefully unlikely) is that if civilization collapsed, and hybrid seeds were no longer available, we mostly don't have the seed stock for self-sustaining agriculture anymore. (but see organizations like http://www.seedsavers.org/).