Which institution was responsible for developing the Marionberry cultivar?

Answer

Oregon State University

The Marionberry is not a naturally occurring wild fruit but rather a product of deliberate horticultural research and breeding efforts. This development took place at Oregon State University, indicating that the specific desired traits—superior flavor and yield—were engineered through controlled cross-pollination between existing blackberry varieties. Its introduction in 1956 marked the success of this institutional research program.

Which institution was responsible for developing the Marionberry cultivar?
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