Jointless is a trait that was introgressed from S. Cheesmaniae about 40 years ago. It is a single gene variant that results in a single long peduncle extending to the fruit. There is really only one advantage to this gene. When you pick a fruit, the stem automatically separates. This is useful when bulk harvesting tomatoes because there are no stems sticking up from the fruit that puncture other fruit.
DarJones
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