Morphological and pomological characterization of two Olea europaea cultivars, 'Karbuncela' and 'Drobnica', grown on the island of Dugi otok, Croatia
Growing cultivars adapted to the environmental conditions of an area is the basis of sustainable olive oil production, especially in marginal areas. It is therefore important to thoroughly characterize 'Karbuncela', a cultivar introduced from Italy 200 years ago, and 'Drobnica', an autochthonous Croatian cultivar, both grown on the island of Dugi otok, Croatia. Forty leaves, fruits and inflorescences were collected from representative branches on the south-facing side of the tree at shoulder level; four trees of each cultivar were sampled. 'Karbuncela' retained most of its original characters. Some morphological characters of 'Drobnica' are: medium vigor, spread growth habit, ovoid fruit shape, nipple present, elliptic stone shape, and low flesh/stone ratio. 'Drobnica' had higher fruit size and weight, stone length and stone length/weight ratio than 'Karbuncela', while 'Karbuncela' had heavier stones. 'Drobnica' had longer inflorescences and more flowers per length than 'Karbuncela', and more functionally male flowers, at 44.4%, compared with 16.0% for 'Karbuncela'; this confirms the use of 'Drobnica' as pollinator. Differences among trees of each cultivar were observed for all morphological characters except fruit, leaf and stone shape and number of flowers. For both cultivars, fruit weight positively correlated with fruit size and maturity stage, while number of functionally male flowers negatively correlated to inflorescence length.
Brkljaca, M., Rumora, J., Marcelić, Š. and Juranov, A. (2018). Morphological and pomological characterization of two Olea europaea cultivars, 'Karbuncela' and 'Drobnica', grown on the island of Dugi otok, Croatia. Acta Hortic. 1199, 41-46
autochthonous, elaiography, flesh/stone, fruit, maturity, Mediterranean, sustainable