| Autor: |
Cuevas J; Department of Agronomy, University of Almería, Campus de Excelencia Internacional Agroalimentario (ceiA3), 04120 Almería, Spain., Chiamolera FM; Department of Agronomy, University of Almería, Campus de Excelencia Internacional Agroalimentario (ceiA3), 04120 Almería, Spain., Pinillos V; Department of Agronomy, University of Almería, Campus de Excelencia Internacional Agroalimentario (ceiA3), 04120 Almería, Spain., Rodríguez F; Department of Agronomy, University of Almería, Campus de Excelencia Internacional Agroalimentario (ceiA3), 04120 Almería, Spain., Salinas I; Department of Agronomy, University of Almería, Campus de Excelencia Internacional Agroalimentario (ceiA3), 04120 Almería, Spain., Cabello D; Department of Agronomy, University of Córdoba, Campus de Excelencia Internacional Agroalimentario (ceiA3), 14071 Córdoba, Spain., Arbeiter AB; Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, SI-6000 Koper, Slovenia., Bandelj D; Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, SI-6000 Koper, Slovenia., Božiković MR; Institute for Adriatic Crops and Karst Reclamation, 21000 Split, Croatia., Selak GV; Institute for Adriatic Crops and Karst Reclamation, 21000 Split, Croatia. |
| Abstrakt: |
Backcrossing between Sikitita and its male parent Arbequina, offers the possibility to check the suitability of different self-incompatibility models proposed for olive. To determine Sikitita's response to self- and cross-pollination treatments, including pollination with its father Arbequina, we compared the parameters following pollen-pistil interaction, the resulting initial and final fruit set, and the paternity of the seeds produced under different crosses. The results showed that Sikitita behaves as a self-incompatible cultivar due to the inhibition of pollen tube growth in the pistil of self-pollinated flowers. This incompatibility reaction led to a significant reduction of self-fertilization and fruit set. Seed paternity analyses confirmed the self-incompatibility response of Sikitita. A similar incompatibility response was observed in Sikitita flowers when hand-pollinated with pollen of Arbequina and Koroneiki. On the contrary, cross-pollination with Arbosana gave excellent results, with analyses showing that pollen of Arbosana is largely preferred by Sikitita to father its seeds more than the pollen of other cultivars presented in the orchard. The backcross failure of Sikitita with Arbequina pollen suggests that the self-incompatibility system in olives is not of the gametophytic type. In contrast, pollination tests fit features of previously reported sporophytic self-incompatibility systems. However, some amendments are proposed, among them the incompatibility groups for Sikitita and Koroneiki. |
