Fine-tuning 'dosage' of mutant genes unleashes long-trapped yield potential in tomato plants

Breeding in plants and animals typically involves straightforward addition. As beneficial new traits are discovered—like resistance to drought or larger fruits—they are added to existing prized varieties, delivered via cross-breeding. But every once in a while, adding a beneficial new trait can result in a net subtraction, due to processes deeply hidden within the interactions of genes underlying existing and newly added traits.

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