USDA ACCESSION NO.: 21226
SELECTION: Seedling selection from a cross made at Prosser, Wa, in 1974.
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
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)
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.