Özet:

In order to determine the suitable pollinator cultivar for the GM-41 olive cultivar candidate, a two-year trial was conducted at the Olive Research Institute in 2018 and 2020. In the study, evaluations were made by considering pollen viability and germination strength and daily maximum temperatures and precipitation that may affect the fertilization biology during the flowering period. In order to determine the fertilization biology of the GM-41variety candidate, open pollination, self-pollination and controlled pollination applications were carried out with four pollinator varieties. As a result of controlled pollination practices, the highest fruit set rates in both years were determined as 1.43% and 0.81% in 2018 and 1.96%, 1.49% in 2020 respectively, in ‘Memecik’ and ‘Ayvalık’ olive cultivars. For this reason, ‘Memecik’ and ‘Ayvalık’ olive varieties are considered to be good pollinators for the GM-41 olive variety candidate. On the other hand, the lowest fruit setting rates were determined in self-pollination applications with values close to zero. Considering the productivity index values, the GM-41 olive variety candidate was classified as self-incompatible. For this reason, it is thought that the use of pollinator varieties in an orchard establishment is necessary in terms of productivity. It was determined that pollen viability and germination rates of the examined cultivars differed between years and were within acceptable limit values that would not cause a problem in terms of fertilization and fruit set.

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