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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Research Unit » Research » Publications at this Location » Publication #157018

Title: THORNLESS BLACKBERRY (RUBUS SP. L) GENOTYPES EVALUATED AS INDIVIDUALLY QUICK FROZEN AND PUREE PRODUCTS

Author
item YORGEY, BRIAN - OREGON STATE UNIVERSITY
item Finn, Chad

Submitted to: HortScience
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/11/2004
Publication Date: 6/1/2004
Citation: Yorgey, B., Finn, C.E. 2004. Thornless blackberry (rubus sp. l) genotypes evaluated as individually quick frozen and puree products. Hortscience. 40(3):513-515.

Interpretive Summary: Trailing blackberries (Rubus sp. L.)are primarily grown for the processing market. While 'Marion', the predominant cultivar, is well known for its processed fruit quality, particularly flavor, aroma, and perception of low 'seediness', it has spines ('thorns') that can end up in the product. A primary goal of the USDA-ARS breeding program is the development of cultivars that are comparable to 'Marion' in fruit quality but are spineless. Ten thornless selections were compared with cultivars as individually quick frozen (IQF) and puree products in a blind evaluation. IQF samples were scored for appearance, color, seediness, flavor, and overall quality and purees for color, flavor, aroma, and overall quality. A 1-9 hedonic scale (1 = dislike extremely, 5 = neither like nor dislike, 9 = like extremely) was used. There were differences among all genotypes for all of the traits evaluated in the IQF product and for all traits except color in the puree. For overall quality, ORUS 1380-1 and ORUS 1843-1 were ranked similar to 'Marion' and significantly better than 'Waldo' as an IQF product. As a puree, ORUS 1843-1 and ORUS 1843-3 were ranked the highest but were not statistically different from ORUS 1380-1, 'Silvan', 'Chester' or 'Marion'. For pureed product flavor, ORUS 1843-1 was not different from ORUS 1843-3, ORUS 1380-1 or 'Silvan', but was significantly better than 'Marion'. While ORUS 1843-1 and ORUS 1843-3 hold great promise, they are from a cross between wild collected Rubus ursinus and 'Waldo' and as a result have some negative characteristics of the native species, particularly small fruit size. NZ 9128R-1, NZ 9351-4 and ORUS 1380-1 all scored similarly to 'Marion' as a pureed product and hold a great deal of promise as thornless genotypes with processed quality similar to 'Marion'.

Technical Abstract: Trailing blackberries (Rubus sp. L.)are primarily grown for the processing market. While 'Marion', the predominant cultivar, is well known for its processed fruit quality, particularly flavor, aroma, and perception of low 'seediness', it has spines ('thorns') that can end up in the product. A primary goal of the USDA-ARS breeding program is the development of cultivars that are comparable to 'Marion' in fruit quality but are spineless. Ten thornless selections were compared with cultivars as individually quick frozen (IQF) and puree products in a blind evaluation. IQF samples were scored for appearance, color, seediness, flavor, and overall quality and purees for color, flavor, aroma, and overall quality. A 1-9 hedonic scale (1 = dislike extremely, 5 = neither like nor dislike, 9 = like extremely) was used. There were differences among all genotypes for all of the traits evaluated in the IQF product and for all traits except color in the puree. For overall quality, ORUS 1380-1 and ORUS 1843-1 were ranked similar to 'Marion' and significantly better than 'Waldo' as an IQF product. As a puree, ORUS 1843-1 and ORUS 1843-3 were ranked the highest but were not statistically different from ORUS 1380-1, 'Silvan', 'Chester' or 'Marion'. For pureed product flavor, ORUS 1843-1 was not different from ORUS 1843-3, ORUS 1380-1 or 'Silvan', but was significantly better than 'Marion'. While ORUS 1843-1 and ORUS 1843-3 hold great promise, they are from a cross between wild collected Rubus ursinus and 'Waldo' and as a result have some negative characteristics of the native species, particularly small fruit size. NZ 9128R-1, NZ 9351-4 and ORUS 1380-1 all scored similarly to 'Marion' as a pureed product and hold a great deal of promise as thornless genotypes with processed quality similar to 'Marion'.