USDA ACCESSION No.: 21079

SELECTION: clonal selection of a leaf color mutant

GENUS: Humulus

SPECIES: lupulus

CULTIVAR: Blue Northern Brewer

PEDIGREE: Canterbury Golding x OB 21 (identical to Northern Brewer USDA 64107)

PRIMARY SITE: USDA/OSU Hop Research Farm, Corvallis, OR

ORIGIN: Ministry of Agriculture, Ieper Belgium. Mr. Depreterre, an official In the Belgian Agriculture adminisration found it as a mutant in a Commercial Norhern Brewer yard in Belgium.

DATE RECEIVED: spring 1974

METHOD RECEIVED: rhizomes

AVAILBILITY: no restrictions

REFERENCES: A. Haunold. Notice of releasae of Blue Northern Brewer hop, an ornamental. USDA. ARS. Washington DC October 272, 1992.

MATURITY: early

LEAF COLOR: dark reddish blue

SEX: female

DISEASES: Downy mildew: moderately resistant

Powdery mildew: no information

Verticillium wilt: tolerant to resistant

VIGOR: Viruses: free of PNRV , Apple Mosaic virus and American Hop Latent Virus

YIELD: very poor

SIDE ARM LENGTH: 6 - 12 inches

ALPHA ACIDS: 6 - 8%

BETA ACIDS: 3 - 4%

COHUMULONE: 24%

STORAGE STABILITY: good, retained 78% of its original alpha acids after 6 months room temperature storage

OIL: 0.76 ml/100 g. Humulene 29%; caryophyllene 1w0%; farnesene none; myrcene 27 - 40%; H/C ratio = 2.96

MAJOR TRAITS: dark blue leaf color, attractive as an ornamental

OTHER INFORMATION: The leaf color is likely due to a single gene. Crosses between Blue Northern Brewer and a male with dark stem pigmentation yhielded a number of seedling with very dark leaf color similar to the female parent. Some are now candidates for release as ornamental hops with much better vigor than the original Blue Northern Brewer.

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