Page Banner

United States Department of Agriculture

Agricultural Research Service

Research Project: Development and Evaluation of Hop Germplasm for the Washington State Hop Growing Region
2009 Annual Report


1a.Objectives (from AD-416)
Develop new hop germplasm adapted to the hop growing region of Washington and evaluate new and advanced experimental germplasm developed by the USDA-ARS for suitability for Washington production.


1b.Approach (from AD-416)
Approximately 100 hop experimental accessions of hop germplasm developed by USDA-ARS will be provided to Washington State University each year where the germplasm will be evaluated under growing conditions representative of the Washington hop growing regions. Single hill observation plots for each accession will be established in the first year (baby year). Production and chemistry data will be collected for two years subsequent to the baby year. Data for the following traits will be collected and documented from the 30% selected individuals: 1) Yield 2) Susceptibility to powdery mildew, aphids and spider mites 3) Bittering acid composition 4) Storage-ability 5) Essential oil composition

Advanced lines identified by USDA-ARS for additional observation under semi-commercial production will be increased and grown out in 5-hill plots at the Prosser research station where data for two years subsequent to the baby year (year of establishment) on the above traits will be collected and recorded. New experimental lines developed at the Prosser station will be provided for evaluation in the Oregon hop producing region. (Congressionally mandated Formerly 5358-21000-035-01S Expired 9/08). Documents SCA with WSU.


3.Progress Report

Washington State has the need of publicly developed hop varieties that perform well under dry and hot conditions. The major accomplishments of this cooperative research include creating hop germplasm for evaluation as high-yield, high-quality hop cultivars adapted to arid hop growing regions, testing advanced selections from USDA-ARS in an arid environment thereby expanding the range of environments in which to test these selections, identifying heritable sources of resistance to hop powdery mildew, evaluating seedlings for high beta-acid content and dwarf growth habit, and evaluation of native North American germplasm for future breeding use. An active and continuous hop breeding program under dry and hot conditions that compliments germplasm development performed by the USDA-ARS hop geneticist is required to maintain USA’s position as a top world producer of hop. Offspring from crosses made by USDA-ARS geneticist as well as from previously made WSU crosses were grown out in field plots with advanced selections replicated in off-station large-scale plots. Chemical analyses were performed on selected germplasm and the results transferred to the USDA-ARS hop geneticist. The results of this project are important as they enable further development of hop varieties and germplasm that perform well under arid conditions and will ultimately benefit growers, merchants and breweries in the USA.

The ADODR monitored the cooperator’s performance on this extramural agreement through site visits, meetings, email correspondence and review of data.


Last Modified: 10/20/2014
Footer Content Back to Top of Page