Virus Tested Pear Germplasm Available at the National Clonal Germplasm Repository in Corvallis, Oregon
DOI:
https://doi.org/10.71318/apom.1988.42.3.109Abstract
More than 1800 unique pear accessions are maintained at the National Clonal Germplasm Repository (NCGR) in Corvallis, Oregon. The 23 primary wild species of Pyrusand over 1400 unique cultivars, rootstocks, and selections are represented in this collection. Sixty-one percent of pear cultivars were found to be infected with common pear viruses. The repository has 575 pear clones that have tested virus-negative as received. Known viruses have been eliminated from 288 pear clones by subjecting them to thermotherapy and micropropagation. These clones are now available to researchers and plant breeders. Most have previously been unavailable in North America as virus-tested plants.
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