Olive is one of the most important fruit tree species worldwide, yet it frequently encounters fruit set problems caused by factors such as sexual incompatibility, climatic conditions, and alternate bearing. In this study, the effectiveness of cross pollination of three cultivars and how embryo development varies among cultivars in fruits obtained as a result of open pollination conditions in these cultivars were determined. As a result of this study, it was determined that pollen tubes reached the ovules within 2–3 days after pollination in all cultivars evaluated, indicating that there was no significant incompatibility problem among them. Embryo development stages showed that the zygote started to divide as of the 2nd week in whole cultivars and Domat showed faster development than Gemlik and Sarı Ulak olive varieties. In the examinations, it was determined that problems may be encountered in the ovaries of the Sarı Ulak variety in some cases, and these problems were thought to be related to the first signs of parthenocarpic fruit formation. However, this situation needs to be examined in more detail. As a result, it was determined that there was no self-incompatibility between Domat, Gemlik and Sarı Ulak varieties used in the experiment, and embryo development occurred regularly in the orchard where these varieties were found together. In this context it is thought that the critical embryo development periods obtained are also important in terms of the timing of maintenance operations.
Dölek et al. (Wed,) studied this question.