COMPARISON OF THE VEGETATIVE AND REPRODUCTIVE CHARACTERISTICS OF TRADITIONAL OLIVE CULTIVARS AND SELECTED LOW VIGOROUS ACCESSIONS IN CENTRAL ITALY
In 1984 the main traditional cultivars of Central Italy (Frantoio, Leccino and Moraiolo) and eight accessions selected for their low vigour were field evaluated. The observations were carried out in the 3-year period, 1990–92. The vegetative development of the accessions ANT, BTL, CMS, MRR, and TND was lower than all the traditional cultivars. In general the yield per tree was related to crown volume. The yield efficiency (oil per tree/crown volume and oil per tree/trunk cross section) of the accessions ANT, BTL and CMS was as high as or higher than the traditional cultivars, whereas the other accessions had lower values. All the accessions had drupes with average weight, oil content (% on dry matter), flesh firmness and flesh/pit ratio equal to or higher than the reference cultivars. All the accessions and cultivars showed an optimal and similar oleic acid content (78÷80%), unsaturated/saturated fatty acid ratio (between 6.0 and 7.0), acidity (< 0.3%), peroxide number (< 12) and spectrophotometric constants of the oils. The accessions ANT, BTL and CMS were particularly interesting since a yield efficiency and oil quality not inferior to the traditional cultivars was associated to low vigour. Moreover they have bigger fruits, useful for improving olive harvesting efficiency and a higher flesh firmness, that plays an important role in safeguarding oil quality. These three accessions seem suitable to be used as new cultivars in high density olive groves and all could be utilised as rootstocks and for olive genetic improvement programs.
Pannelli, G., Volpe, D., Preziosi, P. and Famiani, F. (1994). COMPARISON OF THE VEGETATIVE AND REPRODUCTIVE CHARACTERISTICS OF TRADITIONAL OLIVE CULTIVARS AND SELECTED LOW VIGOROUS ACCESSIONS IN CENTRAL ITALY. Acta Hortic. 356, 123-126