Hussam Khalasi(1)and Mohamed Abd elaziz (1) Lubna Barhom*(1)
(1). Department of Field Crops, Faculty of Agriculture, Tishreen University,
Lattakia, Syria.
(*Corresponding author: Eng. lubna barhom. E-Mail:
lubna barhom@gmail.com)
Received: 7/03/2020 Accepted: 19/07/2020
Abstract
The research was carried out during the agricultural season (2019-2018) in a field within the Dreikish area in Tartous Governorate, to evaluate the performance of some strains of soft wheat: ACSAD 1256, Doma 58847, Doma 58585, Doma 64453, ACSADA 1149, and two certified varieties Doma4, Doma2 under stress drought based on some morpho (plant height and spike length)-physiological(leaf flat and chlorophyll leaf content) in stage 45Z (15 days before flowering) and the proline leaf content in stage 70Z ( 15 days before maturity) traits, which are genetically associated with increased grain yield and improved drought tolerance in stage the70Z). The cultivation took place in a pot, and the experiment was designed using Completely Randomized Designe CRD, with three replications.Drought stress negatively affected the studied indicators, as the content of chlorophyll in leaves decreased, the leaf surface area, plant height, spike length and number of grains per spike, while the leaf content of proline increased in stressful conditions compared to the control. The genotypes studied varied in their response to stress, as the strain DOMA 64453achieved the lowest rates of decline in the leaf content of chlorophyll, plant height and weight of 1000s, while the variety Doma 2 achieved the lowest rates in the decline of the area of the leaf surface, while the strain showed 1256 the highest decline rates in height The plant and the weight of 1000s, although they achieved the lowest rate of decline in the average number of grains per spike. In general, the strain 1256 showed the best traits under the conditions of the control, but the average weight of 1000s decrease in stressful conditions with a high rate there was a significant decrease in the average values of the studied indicators for all genotypes in stress treatment compared to the control, which came as follows: (-22.87)% for the leaf content of chlorophyll and (-27.90)% in the average values for the leaf surface, and (- 14.39)% for the mean the number of grain per spike s values, and (-10.29%) of the average plant height values, compared to a significant increase in the leaf content of proline (+ 29.67)%. Also, significant differences were observed in the weight of 1000s (-3.33)%, and spike height (+0.27). Research recommends Re-study the ACSAD 1256 strain to see its reactions to dehydration in all stages of development. And the continuation of the study on strain DOMA 64453, which achieved the lowest rate of decline in the weight of a thousand tablets under field conditions because it is one of the promising strains as tolerant to drought
Key words: wheat, drought stress, morphophysiology and productivity traits.
Full paper in Arabic: PDF