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
2011 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

One goal of the cooperative agreement is to evaluate the agronomic performance of new hop crosses selected by the Hop Research Council for utility in pilot brewing trials. This agronomic performance information contributes directly to Objective 2 of the in-house project. The highest level of alpha acids produced by any of these lines was approximately 10% and yields ranged from 1200-3100 lb per acre. Brewers are evaluating these results for potential use of these hops in subsequent trials. Yield and hop acid determinations were made of 554 surviving seedlings developed by the USDA hop breeding program in Corvallis and transferred to the Prosser station for evaluation of agronomic performance in the semi-arid environment of central Washington. Alpha acid content and yield of these selections were quite similar to those of established hop varieties that are commonly produced in central Washington. These analyses are being used by hop producers in Washington and Oregon to select for further evaluation in field trials. These cooperative studies will ultimately benefit growers, merchants and breweries in the USA.

The project was monitored through site visits, meetings, email correspondence and review.


Last Modified: 12/28/2014
Footer Content Back to Top of Page