Performance of Hazelnut Cultivars from Oregon in Northeastern Slovenia

Abstract

<jats:p>Three cultivars and three selections from Oregon State University's (OSU) hazelnut (<jats:italic>Corylus avellana</jats:italic>) breeding program were investigated in a yield trial during the period 1997 to 2007 in northeastern Slovenia with the Italian ‘Tonda Gentile delle Langhe’ as the standard. All OSU genotypes had higher cumulative yield and yield efficiency than the standard, all exceeded the kernel percentage of 45%, and all had at least 76% good kernels. OSU 228.084 is promising due to good vegetative growth and the highest yields and yield efficiency. It set many catkins and had the highest percentage of marketable kernels. Its disadvantage could be early flowering and large yield reduction due to low temperatures in early spring. Cultivars/selections that were late flowering (‘Lewis’ and OSU 244.001) had longer durations of pistillate flower receptivity (‘Willamette’ and OSU 238.125) and had lower sensitivity to unfavorable weather conditions in early spring (‘Clark’) expressed the best climatic adaptation. Unmarketable nuts were mainly blanks and poorly filled nuts. ‘Clark’ is precocious early maturing, and well-suited to the kernel market. Due to its upright growth habit, ‘Clark’ could be planted more densely than others. ‘Lewis’ yielded well and had medium yield efficiency, and is suitable for in-shell and kernel markets. Excellent pellicle removal was observed in OSU 244.001 and OSU 238.125. All OSU cultivars and selections showed relatively low susceptibility to hazelnut weevil (<jats:italic>Balaninus nucum</jats:italic>).</jats:p>

Performance of Hazelnut Cultivars from Oregon, Italy, and Spain, in Northeastern Spain

“…However, values of nut and kernel weight and kernel percentage of 'Lewis' were lower than those proposed for that cultivar by Germain and Sarraquigne (2004) and Mehlenbacher et al (2000). Results of nut weight and kernel percentage of the three cultivars from the OSU hazelnut breeding program (Clark, Lewis and Willamette) were similar to those obtained by Solar and Stampar (2009) in a trial with cultivars from Oregon in northeastern Slovenia. Three cultivars, Negret N-9, Tonda di Giffoni, and Clark, were outstanding for their ease of pellicle removal after roasting.…”

Characterisation of selected hazelnut cultivars: phenology, growing and yielding capacity, market quality and nutraceutical value

“…Typical continental weather conditions with a mean annual temperature of 9.7 °C, an absolute summer maximum of 35.8 °C and a winter minimum of − 22.3 °C are characteristic for this region. Long‐term (1961–1990) averages of 1799 h of solar irradiation and 1046 mm of rainfall have been reported 10. Three replicates of each cultivar were planted randomly during the year 1990–1991 at 5 m × 4 m spacing.…”