SELECTION: seedling selection made at the Kirin Brewery Hop Research Farm, Japan

GENUS: Humulus

SPECIES: lupulus

CULTIVAR: Toyomidori

PEDIGREE: Northern Brewer (USDA 64107) x USDA 64103M; Note: The male parent is an open pollinated Wild American hop developed as "OB79" at Wye College, England

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

ORIGIN: Kirin Brewery Ltd. Research Farm, Iwate, Japan

DATE RECEIVED: spring 1992


AVAILBILITY: no restrictions

REFERENCES: Annual Reports for Hops Research, USDA/ARS, 1992 and later years

Sho Hiriuchi and Atsushi Murakami. New Japanese hop varieties with high alpha acid content. J. Amer. Society of Brewing Chemists 50: 10-13. 1992.

MATURITY: medium to medium late

LEAF COLOR: dark green

SEX: female

DISEASES: Downy mildew: moderately susceptible

Powdery mildew: no information

Verticillium wilt: tolerant

Viruses: no information

VIGOR: good

YIELD: very good to poor, quite variable

SIDE ARM LENGTH: 24-36 inches

ALPHA ACIDS: 11 - 13 %

BETA ACIDS: 5 - 6 %


STORAGE STABILITY: fair to good, retained an average of 63% after 6 months room temperature storage

OIL: 1.06 ml/100 g. Humulene 9 - 12%; caryophyllene 4-5%; farnesene trace; myrcene 59%; H/C ratio = 2.07

MAJOR TRAITS: high yield potential, high alpha acids potential

OTHER INFORMATION: In Oregon test plots the alpha acids content was not as high as expected. This hop has largely been discontinued from commercial production in Japan due to some downy mildew problems.

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