Sterile Seeds From Triploid Plants
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Triploid material produces little or no viable seed, which is exactly why some commercial operations use it. For anyone breeding, that makes those lines a dead end regardless of how they grow. Background on how triploids are made and why they resist pollination is explained at https://breederregularseeds.com. The technology is mostly a large scale concern for now, though it does affect what genetics circulate freely.