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| ACCESSION | PLANT NAME | TAXONOMY | ORIGIN | GENEBANK | IMAGE | AVAILABILITY | RECEIVED | SOURCE TYPE | SOURCE DATE | COLLECTION SITE | COORDINATES | ELEVATION | HABITAT | IMPROVEMENT LEVEL | NARRATIVE | | |
|---|
| 0 | PI 618452 | 'Siskiyou' | Rubus hybr. | Oregon, United States | COR |  | Not Available | 1991 | DEVELOPED | 1998 | | | | | Cultivar | Rubus ursinus is the primary species in Siskiyou, but R. idaeus and R. armeniacus (R. procerus) are present in the pedigree. Similar in vigor to 'Marion' but more tolerant of environmental stress. Canes are more tolerant than 'Marion' and less so than 'Kotata'. Canes are more resistant to cane and leaf spot (Septoria rubi Westend) than 'Marion'; however, cane botrytis (Botrytis cinerea Pers.:Fr.) has been observed. No symptoms of yellow rust [Kuehneola uredinis (Link) Arth.] infection and in 1997 no symptoms of the pathogen causing drupelets of 'Kotata' and 'Marion' to turn brown and dry. Siskiyou has shown less winter injury to flower buds and canes than 'Marion'. Siskiyou produces very large, firm, and flavorful berries, early in the blackberry season. Siskiyou averaged 7.8 grams/fruit, larger than 'Kotata' (5.1 grams) or 'Marion' (5.1 grams), but less than 'Black Butte' (9.0 grams). Fresh berries are similar to 'Marion' in color but hold their color better under refrigerations. Siskiyou is firmer than 'Kotata' and 'Black Butte', and much firmer than 'Marion'. The fruit are uniformly shaped and have a large number of drupelets per fruit. Siskiyou tends to fruit on tertiary or late-season flowers that have the tip of the fruit poorly set. Fresh and processed fruit of Siskiyou have excellent flavor; they are not as intense and aromatic as 'Marion' and 'Olallie' but are more similar to 'Kotata'. When tested as a processed product, Siskiyou has been rated very good but not as outstanding as 'Marion'. Siskiyou is one of the earliest ripening trailing cultivars, ripening before 'Kotata' and with 'Black Butte'. Yields of Siskiyou have been similar to 'Kotata', less than 'Marion' and greater than 'Black Butte'. Siskiyou has tested negative for tomato ringspot, raspberry bushy dwarf, and tobacco streak viruses by ELISA and has indexed negative on grafting to R. occidentalis.
Oregon State and USDA selection tested as ORUS 830-4
| 1013446 | PI 618452 |