Abdelouahed Kartas’s research while affiliated with Ibn Tofaïl University and other places

This study aimed to evaluate the genetic variability in the olive tree population (Olea europaea L.) of Ouezzane plantations and identify the performing clones who present interesting agronomic and technological characteristics. The results of studying of agrobiological and technological features of promising clones of olive trees are presented. The numerical values of the main agrobiological characteristics of the clones of the olive. The organoleptic characteristics were summarized. The Statistical analysis (PCA, HCA) showed that the organoleptic proprieties of the fruit and the pit displayed the largest part of the total variance. Six clones S1, S2, M1, M6, G9, and G10, were retained to assess olive fruit and oil production. Among these clones. BM2, BM3, BMM, and BMR were included for exclusively producing oil of remarkable dietary quality. After confirmation of their potentialities by tried comparative trials attempted under different environments. The isolated clones will be multiplied and then distributed to olive growers to establish plantations even the most recent ones.

The objective of this study was to evaluate the major fruit characteristics of olive tree genetic resources. The foreign table varieties (Picholine du Languedoc, Picual, Ascolana Tenera, Gordal) and indigenous varieties (Bakhboukh Beldi, Bouchouk Laghlide), with a very high fruit fresh weight had presented a high pulp stone ratio (in the order of: 8.25; 7.26; 6.89; 6.42; 6.79, 6.07). The Moroccan Picholine local type, M1, M6, G10 and S2, suitable both to table and oil use, with a high fruit fresh weight has presented a pulp stone ratio higher than 6. The types of oleasters (BM2, BM3, BM4, BMR, BMM), with a small fruit size and a low fruit weight (1.86 to 2.49 g), have given pulp kernel ratio adjacent to that obtained in the dual aptitude variety Manzanille (4.40). These characters will be use to define the final destination of cultivated varieties and local types for oil production, table olives (green, black) or canned fruits.

In this study, 15 morphological descriptors were used to characterize and to determine the genetic diversity of the olive tree in the region of Ouazzane, represented by 21 local and foreign cultivars and suspected clones of Picholine Marocaine and types of oleasters. Relating to the organs, the discriminating potential of the fruit characters was higher than that of the endocarp and leaf characters. The similarity index of Rogers Tanimoto between varieties and the studied local types ranged from a minimum of 56, 66% to a maximum of 100%. Picual individuals of Ouazzane and Mjaara areas are similar for all 15 discriminating characters. The same observation was noted for the Picholine Marocaine individuals' type M6, S1 and S2. The individuals Ascolana tenera of Sidi Bousber and Ouazzane areas are also identical. Traditional varieties (Bouchouk Laghlide, Bouchouk Rkike, Bakhboukh Beldi, Bouchouika and Dahbia) were identified by a distinct phenotype, with a tendency to morphological similarity between the two varieties Bouchouika and Bouchouk Rkike. Similarly, six types of local oleaster have been identified by many different phenotypic characters and the majority showed an interesting oil contents. locality are close geographically and genetically and they may have a common origin. These results guarantee to renovate an anxious olive cultivation to preserve and to enhance the existing genetic diversity and the valorization of the typicality of its obtained products.