Özet:

This study has been conducted between 2015 and 2016 at Hazelnut Research Institute in Giresun. The objective of this study was to determine the effects of the pollinizer cultivars on the nut and kernel characteristics. Tombul, Palaz, Çakıldak, Foşa and Allahverdi were used as main cultivars while Tombul, Palaz, Çakıldak, Foşa, Allahverdi, Sivri, Kalınkara and Yassı Badem were used as pollinizer cultivars. Self-pollination was considered as a control and open-pollination was taken as an application. In the study, it was determined that the pollinizer cultivars caused changes in some nut and kernel characteristics with the xenia and metaxenia effects. The effects of pollinizers on nut set and number of nut in clusters were quite obvious. Self-pollination resulted in low nut set and number of nut in clusters, indicating it is self-incompatible. Open pollination and different cross-pollination treatments increased nut set and number of nut in clusters. It is estimated that the changes in the pomological characteristics may be related to the nut set as well as the pollen sources. The kernel percentage and good kernel were generally low in self-pollination. Open-pollination and cross- pollination treatments increased kernel percentage and good kernel. It has also been improved that the pollinizer cultivars may cause changes in nut shape. Palaz pollination treatment caused decrease of nut shape index in main cultivars.

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