Incompatibility Alleles Expressed in Pollen of Turkish Hazelnut Cultivars

Sphorophytic pollen-stigma incompatibility is a characteristic of the genus Corylus. Incompatibility alleles expressed in thepollen of Turkish hazelnut cultivars were identified. Cultivars were selected from the field collection at Giresun, and were used asthe pollen parents. Tester plants, whose S-alleles were known, were located in Ankara and Corvallis. Compatible crosses producedmasses of long and parallel tubes while incompatible crosses produced very short tubes that often curved or ended with apronounced bulb. The incompatibility alleles S2, S5, S8, S10, S12, S21 and S24 were identified in the pollen of Turkish cultivars. Pollenof Palaz and Yuvarlak Badem expresses S2, pollen of Fosa, Mincane and Sivri expresses S8, pollen of Kan, Cavcava, Aci and Kargalakexpresses S10, pollen of Incekara Kalinkara and Uzunmusa expresses S21, pollen of Yassi Badem expresses S5, pollen of Tombul expresses S12 and pollen of .akildak expresses S24.