The present invention relates to a primer set and a method for selecting an ulcer disease-resistant tomato for selecting a tomato resistant to ulcer disease (Bacterial canker), and a tomato ulcer disease-resistant tomato that is indistinguishable with the naked eye using the primer set for selecting a tomato ulcer disease-resistant tomato of the present invention Since it can be evaluated objectively, it can be usefully used to improve tomato varieties and evaluate resistance to tomato ulcer disease for improved varieties.
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