Ahmed Qasim* ⁽¹⁾, Mohammad Shafik Hakim ⁽¹⁾ and Abdallah Al–Yossef ⁽²⁾.

• Field Crops, Faculty of Agriculture, University of Aleppo.
• Research center in Aleppo, GCAR, Syria.

(*Corrsponding author: Ahmed Qasim. . E-Mail: Ahmedkassem11194@gmail.com).

Abstract   

The study was carried out during 2018/2019 season in  two locations, first at AL-sfira zone B (rainfed) and Hmayma location zone C (irrigated)  belong to Scientific Agriculture Research Center in Aleppo, the study aim to identification of  selection indicators for local wheat Lips (Triticum durum) under varying environmental conditions، 25 durum wheat genotypes of (local lines) were planted in addition to 5 cultivars Cham 3, Cham 5, Cham 7, Cham 9 and Doma1 as a check verities under two treatments (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 result of drought stress, the Correlation between phonological  indicators (Days to Heading, Days to Maturity), morphological (peduncle length, spike length, Awn length), Flag leaf Area  and grain yield under both conditions was estimated for determining the most effective indices which were used to breeding programs،qualities were studied use of path Analysis were studied for qualities to know the contribution of each attribute yields ،The result showed the drought stress reduced grain yield for all genotypes significantly,  the lowest decreases was observed in cham5 compared to the rest of control and genotypes with decrease of (8.15%) which gave the highest productivity in rainfed agriculture conditions by (3289 kg/h) followed by the genotype Horani nawawy with a decrease of (9.85%) with a productivity of (2653 kg/h). The result showed presence of positive and high moral genetic and phenotypic link between grain yield and (Grains Per Spike, 1000 – Kernel Weigh) While the link was negative and highly moral with (Days to Heading, Days to Maturity) the weight attribute of one thousand tablets is more contributing to yield with positive direct effect(0.35) in irrigated farming conditions، in rainfed agriculture the results indicated a positive and highly significant genetic and phenotypic correlation between grain yield and (1000 – Kernel Weight, Spikes Per Unit Area, Flag Leaf Area, Awn Length) while the link was negative and highly moral with (Days to Heading, Days to Maturity) the number of spikes per square meter was the most direct attribute of yield with positive direct effect (0.282)، the recipe for number of days until splicing had a direct negative effect on grain yield (-0.403).  

Keywards: Durum Wheat, Selection indices , Drought Tolerance, combined analysis ، path Analysis.

Full paper in Arabic: pdf