USDA ACCESSION NO.: 21373

SELECTION.: seedling selection Nr. 7006-398 of cross 7006 made at Corvallis OR. in 1970

GENUS: Humulus

SPECIES: lupulus

CULTIVAR: Horizon

PEDIGREE: USDA 65009 x USDA 64035M; Brewer's Gold x Early Green-unknown male x Zattler Seedling

PRIMARY SITE: OSU - UDDA Hop Farm, East Farm, Corvallis, OR. 97331

DATE RECEIVED: cross made in 1970. USDA Accession Nr. assigned in 1982

METHOD RECEIVED: seedling selection

AVAILABILITY: no restrictions, commercial variety released by USDA

REFERENCES: Alfred Haunold: Various USDA Annual reports starting in 1970

Alfred Haunold. Various Annual Reports to the Hop Research Council starting in 1990.

USDA-ARS. 1997. Release notice of Horizon, a dual purpose high-alpha hop.

MATURITY: medium late

LEAF COLOR: green

SEX: female

DISEASES: downy mildew: moderately sdusceptible

Verticillium wilt: moderately resistant

Viruses: latest tests in 1993 showed no presence of Prunus Necrotic Ringspot and Apple Mosaic viruses,the so-called ILAR viruses, but moderate infection with CARLA viruses (hop mosaic, hop latent and American hop latent viruses) which did not appear to affect cone yields.

VIGOR: moderately vigorous

YIELD: medium to good, averaging 1,800 to 2,000 lbs/acre in Washington test plots, but somewhat less in Oregon where downy mildew was a problem.

SIDE-ARM LENGTH: 15 to 30 inches

ALPHA ACIDES: 13.6% on average (range: 10.2 to 16.5%)

BETA ACIDS: 6.3% (range: 4.6 to 9.0 %)

COHUMULONE: 19% (range: 17 to 22%)

STORAGE STABILITY: very good, retained 68 to 89% or original alpha acids after 6 months room temperature storage

OIL: range of 1.25 to 2.60 ml/100 g; 60-70% myrcene; 8-10% humulene; 5-6% caryophyllene; 2% farnesene. Ratio of Humulene/caryophyllene = 1.5 to 1.7

MAJOR TRAITS: high alpha acids content coupled with very low cohumulone content. This hop is a diploid, 2n = 20 and should be grown in the absence of male hops to avoid seed production.

OTHER INFORMATION: This hop is being tested on a l imited acreage by a major brewer. The low cohumulone content appears to be beneficial for foam stability and pleasant "mouthfeel" as judged by professional taste panels. The mother of Horizon, USDA 65009, is also the mother of Nugget, USDA 21193.

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