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ISHS Acta Horticulturae 1299: XXX International Horticultural Congress IHC2018: VII International Symposium on Tropical and Subtropical Fruits, Avocado, II International Symposium on Jackfruit and Other Moraceae and II International Symposium on Date Palm

Determination of growth performance in fig cultivars applied with different gamma radiation dosages

Authors:   M. Özen, F. Çobanoğlu, E. Tutmuş, S. Arpacı, A. Belge
Keywords:   fig, Ficus carica L., mutation breeding, growth performance
DOI:   10.17660/ActaHortic.2020.1299.34
Abstract:
This study was carried out in Fig Research Station during 2007-2016. Improvement of new fig (Ficus carica L.) cultivars is very important in the sense of Turkey’s fig industry. ‘Sarılop’, dried fig cultivar and ‘Bursa Siyahı’, fresh fig cultivar in Turkey are used in this study. It is aimed to obtain new cultivars that are superior (large fruit sized, early ripening, and small ostiole). This project started to apply 6 different gamma radiation doses (60Co) onto the scions belonging to these two fig cultivars in 2007. Six cobalt gamma radiation doses (0.0, 10.0, 16.9, 25.3, 50.7 and 67.0 gray (Gy)) were applied to 6 groups that are consisted of 25 scions per group taken from ‘Sarılop’ and ‘Bursa Siyahı’ fig cultivars. M1V1, M1V2, M1V3 plants were obtained via grafting during three years. Shoot growing speed and survival rate of M1V1 (mutation 1 vegetation 1) plants are examined. LD50 values are determined as 50.7 Gy in ‘Sarılop’, 25.3 Gy in ‘Bursa Siyahı’. In the end of the three years, as 992 ‘Sarılop’ M1V3 individuals, and 836 ‘Bursa Siyahı’ M1V3 individuals, 1828 M1V3 individuals in total were obtained. These nurseries were planted in 2010, in the experimental orchard as 3×1.25 m spaces. Growing situation of these individuals is observed and epistatic effect deaths in these individuals are examined. While epistatic effect death is defined the most as 16.60% via 67.0 Gy in ‘Sarılop’ cultivar, this rate is determined the most as 9.82% via 25.3 Gy in ‘Bursa Siyahı’ fig cultivar.

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