Genetic variations of cold hardiness within Iranian ornamental pomegranates
Ornamental pomegranate (Punica granatum var. pleniflora) has an unusually high petals number and produces attractive large flowers. Frost injury is a major limiting factor in the spread of ornamental pomegranates in Iran and some other countries. This study was carried out to determine the cold hardiness of seven ornamental pomegranate genotypes including; 'Daneshkade Keshavarzi Shiraz', 'Rijab Kermanshah', 'Sarvestan Fars', 'Kenar Takhteh Fars', 'Shahdad Kerman', 'Zinati Saveh' and 'Khoshe Nar Baharestan Sari'. One-year-old stem cuttings from mature trees were used for measurement of cold hardiness during deep dormancy, using electrolyte leakage method. Results showed that variation in cold hardiness among genotypes ranged from -17.65 to -24.03°C. Based on obtained results of freezing hardiness, genotypes could be divided into three groups: 1) freezing tolerant group; 'Daneshkade Keshavarzi Shiraz' (-24.03°C) is the only genotype located in this group; 2) freezing susceptible group; only consisting of the 'Rijab Kermanshah' (-17.65°C); and 3) group with intermediate freezing hardiness including 'Koshe Nar Baharestan Sari' (-21.8°C), 'Zinati Saveh' (-21.27°C), 'Shahdad Kerman' (-19.7°C), 'Kenar Takhteh Fars' (-19.52°C) and 'Sarvestan Fars' (-19.07°C). Obtained results will facilitate the selection of suitable and well-adapted genotypes to be used in landscape of different regions of the country with varied climatic conditions.
Ghasemi Soloklui, A.A., Gharaghani, A., Yavari, A.M., Eshghi, S., Nasrabadi, M.E. and Vazifeshnas, M. (2018). Genetic variations of cold hardiness within Iranian ornamental pomegranates. Acta Hortic. 1190, 53-58
pleniflora, Punica granatum, freezing hardiness, electrolyte leakage