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Marionberry

Marionberry
Marionberries (2493507934).jpg
Genus Rubus
Hybrid parentage 'Chehalem' × 'Olallie'
Cultivar 'Marion'
Origin Marion County, Oregon, 1956

The 'Marion' cultivar (Rubus L. subgenus Rubus) or Marion blackberry, marketed as About this sound marionberry , is a blackberry developed by the USDA ARS breeding program in cooperation with Oregon State University. It is a cross between the 'Chehalem' and 'Olallie' blackberries. The marionberry is currently the most common blackberry cultivar, accounting for over half of all blackberries produced in Oregon.

The marionberry is a vigorously growing trailing vine, usually producing just a few canes up to 20 feet long. The vines have many large spines, and the fruiting laterals are long and strong, producing many berries. The berry is glossy and, as with many blackberries, appears black on the plant, but turns a deep, dark purple when frozen and thawed. It is medium in size and tends to be conical, longer than it is wide. The berry has a somewhat tart flavor, fairly earthy with traces of sweetness. It is larger, sweeter and juicier than the 'Evergreen' blackberry. The relative complexity of its flavor has led to a marketing label as the “Cabernet of Blackberries”. The more powerful flavor of the marionberry has led to it dominating current blackberry production. It is often preferred over other blackberries as an ingredient in pies, ice cream, jellies, jams and other foods.

The marionberry was developed by the USDA Agricultural Research Service at Oregon State University in Corvallis, Oregon. It was bred by George F. Waldo, as a mix between the small, flavorful 'Chehalem' berry and the larger, better-producing 'Olallie' berry. Both the 'Chehalem' and 'Olallie' berries are caneberry hybrids, as well. Waldo made the initial cross in 1945, selected it as OSC 928 in 1948 in Corvallis, and tested it in Marion County and elsewhere in the Willamette Valley. The berry was released in 1956 under the name Marion, after the county where it was tested extensively. Oregon produces between 28 million and 33 million pounds annually, with Marion County and Willamette Valley collectively accounting for over 90% of current production. The marionberry's growing conditions are perfectly adapted to the mild, maritime Oregon climate, with its mild rains and warm summers. The berries ripen throughout late spring and early summer. The harvesting season is typically between July 10 and August 10, with a single acre producing up to six tons in a harvest.


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