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More than half of European hazelnut (Corylus avellana) production occurs in Turkey. Despite this dominance, the yield of Turkish cultivars has remained stagnant over the past 10 years with Italian yield nearly double that in Turkey. This difference is due to Turkey’s unique cultivation system; hazelnuts are grown in bushy clusters (“ocak” system), not as single trees. Current hazelnut breeding efforts...
Turkey is a rich source of European hazelnut (Corylus avellana) germplasm with nearly 400 accessions in the national collection. This genetic material encompasses cultivars, landraces and wild genotypes which were characterized for 12 nut and 13 kernel traits over 2 years in the 1990s. Analysis of these attributes revealed both the positive and negative impacts that human selection and breeding have...
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