Submitted to: International Congress on Hazelnut Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 8/1/2001
Publication Date: N/A
Interpretive Summary: The U.S. national collection of hazelnut genetic resources is preserved at theU.S.DepartmentofAgriculture,AgricultureResearchServiceNational Clonal Germplasm Repository at Corvallis, Oregon. Hazelnuts, which are also known as filberts, are botanically separated into nine species, four tree-types and five shrub-types. These species are native to mild temperature climates in the northern hemisphere. The Corvallis Repository preserves representatives of these species and economically important cultivated varieties and rootstocks in an orchard. The trees have back-up representatives which are maintained on-site as tissue cultured plants. These tissue cultured plants are placed in refrigerators and can be stored for two to three years. The repository provides plant materials for researchers who are interested in improving the hazelnut. The repository has shipped material from more than 600 hazelnut pants to requestors in 11 different countries during the past nine years.
Technical Abstract: The U.S. national collection of hazelnut (Corylus L.) genetic resources is preserved at the U.S. Department of Agriculture, Agricultural Research Service National Clonal Germplasm Repository at Corvallis, Oregon. The hazelnut, also commonly known as filbert, is native throughout temperate regions of the northern hemisphere and includes four tree and five shrub species. The Corvallis Repository preserves genotypes of each of these species plus about 320 named cultivars, selections, and rootstocks from more than 27 countries. These clones undergo pathogen testing and elimination procedures upon receipt. They are preserved as trees in an orchard, with on-site backup of about 10% as tissue cultures stored at 35o F. Excised seed axes of several species are cryopreserved in liquid nitrogen. A remote back-up orchard is being established in Parlier, California, to safeguard the collection. The Corvallis Repository collection is available to international collaborators for evaluation, research or breeding purposes. During the past nine years the Repository distributed more than 600 Corylus accessions to requestors in 11 countries. This germplasm was distributed as pollen, seed, scionwood, layers, plants, and tissue cultures. Germplasm can be requested from the Corvallis Repository Curator.