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lack of genetic diversity used in past breeding. Sathuvalli and Mehlenbacher (2011) used simple sequence repeat marker analysis to characterize 67 C. americana × C. avellana hybrid hazelnut accessions held in the USDA Agricultural Research Service

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RADseq ( Peterson et al., 2012 ), SSR markers continue to have many research and breeding applications in plants. In hazelnut, for example, Özturk et al. (2017) studied associations of SSR markers with nut and kernel traits in a Slovenian hazelnut

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OSU 541.147 is a new hybrid hazelnut ( Corylus ) cultivar for eastern North America. It was released by the Hybrid Hazelnut Consortium in Apr 2020 for its resistance to eastern filbert blight (EFB) caused by the fungus Anisogramma anomala

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family to the Oregon hazelnut industry and the Oregon State University (OSU) hazelnut breeding program. Jan Wepster, his wife Linda, and his father Bert were active in the Oregon hazelnut industry for many years. Jan Wepster was instrumental in the

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Methods The hazelnut breeding program at Oregon State University (OSU), in cooperation with the U.S. Department of Agriculture, Agriculture Research Service, National Clonal Germplasm Repository (USDA-ARS-NCGR) in Corvallis, OR, imported scions of

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Oregon Agricultural Experiment Station Technical Paper no. 9634. This research was supported with funds from the Oregon Hazelnut Commission. We thank Loretta K. Brenner for technical assistance. The cost of publishing this paper was defrayed in part

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various C. avellana cultivars with C. americana ‘Rush’, a wild hazelnut selected in southeastern Pennsylvania ( Crane et al., 1937 ; Molnar, 2011 ; Reed, 1936 ; Slate, 1961 ; Thompson et al., 1996 ). Although these early breeding efforts used only

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) hazelnut breeding program has combined ‘Gasaway’ resistance with other desirable traits, and a series of new cultivars and pollenizers has been released ( Mehlenbacher et al., 2007 , 2009 , 2011 , 2012 ). Recently released cultivars with Gasaway

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to take notes on the trees and comment as to which were more desirable. These comments supplemented the notes recorded by the hazelnut breeding program (S.A. Mehlenbacher and D.C. Smith). Fig. 1. Pedigree of ‘Red Dragon’ ornamental hazelnut

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‘Yamhill’ (ratings of 5.0 and 5.1) and ‘Jefferson’ (ratings of 4.3 and 4.6). Blanching removes approximately half of the pellicle from ‘Barcelona’ kernels. Kernel texture, flavor, and aroma have been evaluated by members of the hazelnut breeding team, the

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