Selection‏ ‏of Tetraploid Primitive Wheat Genotypes Tolerant ‎to Drought Stress ‎

Yaman Jabbour*(1) Mohammad Shafik Hakim(1) Filippo M Bassi(2) Abdallah Al-Yossef(3)  Maysoun M. Saleh(3) Ahmad Shams Al-Dien Shaaban(4)

(1). Department of Field Crops, Faculty of Agriculture, Aleppo University, Aleppo, Syria.

(2). International Center for Agriculture Research in the Dry Areas (ICARDA), Aleppo, Syria.

(3). General commission for scientific Agriculture research (GCSAR), Damascus, Syria.

(4). Department of Biotechnology Engineering, Faculty of Technological Engineering, Aleppo University, Aleppo, Syria.

(*Corresponding author: Eng. Yaman Jabbour. E-Mail:

Received: 17/05/2019                               Accepted: 15/07/2019


The study was carried out during 2016/2017 season at AL-Sfira location which belongs to the Scientific Agriculture Research Center in Aleppo. The study aimed to select drought tolerant tetraploid primitive wheat genotypes. 22 genotypes of tetraploid primitive wheat belong to three types were: T. polonicum, T. carthlicum and T. dicoccom in addition to 2 cultivar; Cham5 and Bohouth7 as control that were planted in two trials (water-stress) and (un-water stress) in a randomized complete block design with two replications. Grain yield were studied and the percentage of reduction was estimated as a result of water stress. Drought tolerance indices were assessed, also viz. Yield Stability Index (YSI), Tolerance Index (TOL), Mean Productivity (MP), Geometric Mean Productivity (GMP), Stress Susceptibility Index (SSI) and Stress Tolerance Index (STI). The correlations between drought tolerance indices and grain yield under both conditions were estimated for determining the most effective indices which were used to estimate Principle Component Analysis of genotypes, in addition, a Genotype Environment Interaction analysis was conducted. The results showed that the drought stress reduced grain yield for all genotypes significantly, the lowest decrease was recorded for T. polonicum (N.16) 21.44% which had the highest yield under drought stress (380 g/m2), and the most effective indices were (GMP MP and STI) for drought tolerance selection genotypes, and according to the values of drought tolerance indices the two genotypes 16 and 19 were the best genotypes followed by (20, 21). Principal Component Analysis revealed that the genotypes (16, 19, 20 and 21) were the best genotypes under the two treatments, and this conclusion was confirmed by genotype environment interaction analysis, which showed that the best genotypes were T.carthilicum (N. 20) and T. polonicum (N.16) in terms of yield and stability under study environments.

Key wards: Primitive wheat, Selection, Drought tolerance indices, Genotype environment interaction, Principle component analysis.

Full paper in Arabic: PDF

Evaluation and Selection of Wild Olive (Olea sylvestris) Phenotypes Spread in Hama Governorate, Syria

Reem Abdelhamid *(1)

(1). Horticulture Research Administration, General Commission for Scientific Agricultural Research (GCSAR), Damascus, Syria

(*Corresponding author: Dr. Reem Abdelhamid. E-Mail:

Received: 08/10/ 2014                                     Accepted: 16/06/ 2015


This research was carried outduring the period 2009-2012to identify locations of wild olive (Oleasylvestris) distribution in Hama governorate in Syria. The most important three locations of wild olive were chosen i.e. Sigata, Tal Aafar, and Ain Al Nabed. 20 morphotypes were selected and characterized from the three main regions, depending on IOC application; also the fruits were characterized depending on the oil content. The results indicated wide diversity within wild olive genotypes at the same location and between all locations. Wild olive is a collection of genotypes rather than ecotypes. Genotypes wa6, wt8, and ws2 were selected as double purpose (oil and pickling), wa4 and wt4 for oil, while wt6 was selected as pickling genotype. The results exhibited the efficiency of the characterization of wild olive phenotypes methods, and it is recommended to be used in olive biodiversity studies.

Key word: Wild olive, Phenotypes, Evaluation, Selection, Oil content.

Full paper in Arabic:

 تقييم وانتخاب طرز مورفولوجية من الزيتون البري (Olea sylvestris) المنتشرة في محافظة حماه السّورية