Morphological, agronomic and oil quality Studies of two new olive (Olea europaea. L) progenies in Tunisia
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Morphological, agronomic and oil quality Studies of two new olive (Olea europaea. L) progenies in Tunisia
Abstract
The most cultivated olive oil variety in Tunisia “Chemlali Sfax” has low oleic acid level and high palmitic acid level. In order to resolve this problem, a genetic improvement program throught controlled crosses between Chemlali Sfax and other Tunisian and foreign varieties was started in 1993 and had generated a collection of 1200 hybrids. The aim of this study is to characterize two selected hybrids on the morphological, agronomic and oil quality plans (Hd1= Meski/Chemlali Sfax and Hd2 = selfpollinated Chemlali Sfax). Morphological characters showed a wide variability. Also, the results of tolerance to Verticillium showed that the average infection rate of Hd2 hybrid (48.46%) is significantly lower than that of the hybrid Hd1 (76.08%). Moreover, the acid composition of both hybrids was more interesting. In November, palmitic and linoleic acids concentrations for Hd2 were low (11.5 and 14.1%), while the oleic acid concentration was high (70.5%) as compared to the hybrid Hd1 (65.3%). Thus, the database analysis revealed that the plant material was clustered into two main groups according to the year. Consequently, the principal component analysis generated two principal compounds which accumulated 91.1% of the total variance.
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