ISHS Acta Horticulturae 1297: XXX International Horticultural Congress IHC2018: V International Symposium on Plant Genetic Resources and International Symposium on Applied Functional Molecular Biology
Morphological characteristics and oil quality aspects of some Jordanian olive cultivars |
| Author: | S. Ayoub |
| Keywords: | olive fruit weight, stone weight, fruit oil content, fatty acids, polyphenols, vitamin E, sensory evaluation |
| DOI: | 10.17660/ActaHortic.2020.1297.42 |
| Abstract:
This study aimed to evaluate the morphological characteristics and oil chemical quality of some Jordanian traditional olive cultivars. Olive groves were selected in four different traditional olive areas in Jordan including Irbid, Ajloun, Jerash and Salt. The selected cultivars were ‘Nabali Baladi’, ‘Rumi’, ‘Souri’ and ‘Nabali Muhassan’. A standard protocol previously developed by the International Olive Oil Council for morphological characterization and oil chemical composition of olive cultivars was followed. Oil extracted from weighted fruits of individual trees using an olive mill suitable for small quantities was used for the chemical and organoleptic evaluation. Results showed significant differences between olive cultivars from different locations in fruit morphological measurements and in fruit oil content. All oil samples obtained from the traditional cultivars were of high quality and classified as extra virgin olive oil. Data showed significantly high content of total polyphenols in ‘Nabali Baladi’ and ‘Rumi’ olive oil compared to other cultivars. Vitamin E content was significantly the highest in olive oil from ‘Souri’ and ‘Rumi’ cultivars. Results of fatty acids composition showed significant differences between cultivars in the main fatty acids, i.e., stearic acid, linoleic acid and linoleic acid. However, no significant differences were observed in oleic acid content between cultivars. Significant differences of fatty acids contents were found between the same cultivars from different locations. Olive oil organoleptic evaluation showed higher positive attributes for ‘Nabali Baladi’, ‘Souri’ and ‘Rumi’ cultivars compared to ‘Nabali Muhassan’ cultivar. Based on these results, several cultivars with valuable traits could be recommended for multiplication and large-scale cultivation, or for further utilization in breeding programs. | |
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