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Watermelon is just starting to come in season in the northeastern U.S., and having a seedless watermelon is convenient. The only downside is, the "seedless" almost always still have the immature, sterile white seeds in them.

What is the mechanism for breeding these watermelons so that only these white seeds remain? What is the genotype that results? Could the genetics be modified so that there are virtually no seeds (short of any minor aberrations) left in the flesh of the fruit?

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up vote 7 down vote accepted

The seedless watermelons, like bananas, are a crop that are specifically bred to be trisomic (three copies of a chromosome). The consequence is the seeds are non-viable.

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What, if anything, would be required to eliminate the seeds altogether? Or are you saying this is as far down that road as we can go? – jonsca May 6 '12 at 5:16
That I can't comment on. – user560 May 6 '12 at 12:57

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