USDA ACCESSION NO.: 21484
SELECTION: Seedling selection Nr. 8305-17 from cross 8305 made at Corvallis OR in 1983.
PEDIGREE: USDA 21397 x 21373M; Tetraploid Hallertauer mittelfrueh x diploid Saazer- OP 4/6 Hallertauer mittelfrueh; 1/6 Saazer; 1/6 unknown
PRIMARY SITE: USDA-OSU experimental hop farm. East Farm, Corvallis OR.
ORIGIN: Cross 8305 made in1983. USDA Accession Nr. assigned in 1985
DATE RECEIVED: 1983
METHOD RECEIVED: seedling selection
AVAILABILITY: no restrictions, commercial cultivar released by USDA
REFERENCE: Alfred Haunold. Various USDA Annual reports starting in 1983.
Alfred Haunold. Various Reports to the Hop Research Council starting about 1988
A. Haunold, G.B. Nickerson, U. Gampert, and D.S. Kling. 1997. Registration of 'Ultra'Hop. Crop Science 37: 291 - 292. 1997.
MATURITY: medium late
LEAF COLOR: dark green
DISEASES: downwy mildew: moderately resistant
Verticillium wilt: moderately resistant
Viruses: free of all 5 major hop viruses at the time of its release (1995)
VIGOR: very good
YIELD: very good, 1,800 to 2,000 lbs/acre in Oregon and Washington; not adapted to southern Idaho.
SIDE-ARM LENGTH: 24 to 36 inches
ALPHA ACIDS: 3 to 5%
BETA ACIDS: 4 to 5%
COHUMULONE: 25 to 30%
STORAGE STABILITY: good, similar to Fuggle (USDA 48209) or Willamette (USDA 21041)
OIL: 1.3 to 1.5 ml/100 g, somewhat higher than Hallertauer mittelfrueh. 30 - 40% humulene, 30% myrcene, 12 - 14% caryophyllene, no farnesene. This oil composition is nearly identical to that of Hallertaur mittelfrueh
MAJOR TRAITS: similar aroma profile to Hallertauer mittelfrueh; high yield potential
OTHER INFORMATION: This hop is a triploid, 2n= 30 and is nearly seedless even when grown in the presence of fertile male hops. Ultra is prized by craft brewers because of its Hallertauer-like aroma and pleasant bitterness.