USDA ACCESSION NO.: 21226

SELECTION: Seedling selection from a cross made at Prosser, Wa, in 1974.

GENUS: Humulus

SPECIES: lupulus

CULTIVAR: Chinook

PEDIGREE: Petham Golding x Brewer's Gold - Utah 526-4 68052 x 63012M

PRIMARY SITE: USDA World Hop Variety Collection, OSU East Farm

ORIGIN: Cross made by C. E. Zimmermann at Prosser, WA, in 1974 selection tested as W421-38 and permanent USDA Accession No. assigned in 1980.

DATE RECEIVED: Spring 1980

METHOD RECEIVED: Rhizomes

AVAILABILITY: Commercial cultivar, no restrictions

REFERENCES: Kenny, S. T., and C. E. Zimmermann. Registration of Chinook hop (Registration No. 15). Crop Sci. 26:196-197. 1986.

Romanko, R. R. In: Steiner's Guide to American Hops, 2nd. ed. 1986.

MATURITY: Medium to medium late

LEAF COLOR: Medium green

SEX: Female

DISEASES: Downy Mildew: moderately resistant

Verticillium wilt: resistant

Viruses: susceptible to hop mosaic virus

YIELD: 1800-2400 1bs/acre

SIDE ARM LENGTH: 24-40 inches

ALPHA ACIDS: 13.6 (5 year average: 13.9-15.3%)

BETA ACIDS: 3.9% (5-year average 3.6 to 4.5)

COHUMULONE: 33%

STORAGE STABILITY: Fair to good

OIL: 1.83 ml/100 g (5-year range 1.24 to 2.63)

MAJOR TRAITS: High alpha-acids content, low beta, pleasant aroma

OTHER INFORMATION: Hop is being used by a major brewer as a high-alpha/ aroma hop primarily for bitterness addition. Adapted to Oregon, Washington and Idaho but grown now mostly in Washington. 1997 production: 3.69 million lbs. Considered to be a super-alpha hop by the trade.

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