Koroneiki Download sheet Fruit Denomination and synonyms I. Trujillo, D. Barranco, P. Morello Koroni Koroni Kritikia Kritikia Ladolia Ladolia Psilolia Psilolia Vatsiki Vatsiki Origin and diffusion It is the most widespread olive oil variety in Greece. The majority of plantations are located in Crete and Peloponnese while it is practically grown throughout Greece. It is the basis for new plantations throughout the country and is estimated that between 50-60% of Greece’s olive-growing acreage is dominated by Koroneiki. Georgios Koubouris Purpose Oil Morphological characterisation Tree Vigour Medium Growth habit Spreading Canopy density Sparse Fruit Weight Low Radio length/width in position A Moderately elongated Over colour at full maturity Black Symmetry in position A Weakly asymmetric Shape of apex in position A Acute Nipple Absent or weak Shape of base in position A Truncate Leaf Length Short Width Narrow Radio length/width Moderately elongated Curvature of longitudinal axis Incurved Stone Radio length/width Moderately elongated Weight Low Shape of apex in position A Acute Symmetry in position A Weakly asymmetric Symmetry in position B Symmetric Shape of base in position A Acute Number of grooves on basal end Between 7 and 10 Distribution of grooves on basal end Evenly distributed Mucron Present Rugosity of surface Weak Molecular characterisation (SSRs) UDO-43 DCA3 DCA9 DCA16 GAPU-101 170/214 237/237 180/204 144/148 191/205 Agronomic characterisation and commercial considerations It has a medium-to-high rooting ability (Kostelenos, 2011). It comes into bearing early and it flowers early (Metzidakis). It produces abundant pollen. Its time of ripening is early to intermediate. Its productivity is high and constant. It is highly appreciated for its high oil yield and quality. The appreciation of its oil is high, due to the very high content of oleic acid and stability index. It is used also for hedgerow olive plantations.It is a hardy variety due to its adaptation to different climates and soil conditions; in particular, it is considered tolerant to drought. However, it is sensitive to cold and moderately tolerant to salinity (Chartzoulakis 2005). It is resistant to leaf spot, moderately resistant to verticillium wilt (Markakis et al., 2022), and moderately resistant to olive fly (Kalaitzaki et al.) but is very susceptible to olive knot. ReferencesChartzoulakis K.S. 2005. Salinity and olive: Growth, salt tolerance, photosynthesis and yield. Agricultural Water Management 78:108–121.Kalaitzaki A, Koufakis I, Papadaratsaki A, Manolikaki I, Koubouris G (unpublished data) Field evaluation of the susceptibility of olive cultivars to Bactrocera oleae in Western Crete (Southern Greece). Kostelenos G. 2011. Elements of Olive Growing. Book.Markakis E.A., Krasagakis N., Manolikaki I., Papadaki A.A., Kostelenos G., Koubouris G. 2022. Evaluation of Olive Varieties Resistance for Sustainable Management of Verticillium Wilt. Sustainability 14: 9342.Metzidakis (unpublished data) Agronomical characterization of olive varieties in Greece. Georgios Koubouris