Abdelrazzak Asaud*⁽¹⁾ Maamoun Khaity⁽²⁾ Ahmad Haj Suleiman⁽³⁾

(1). Izraa Research Station, Daraa Research Center, General Commission for Scientific Agricultural Research (GCSAR), Daraa, Syria.
(2). Field Crops Department, Faculty of Agriculture, Damascus University, Damascus, Syria.
(3). Aleppo Research Center, GCSAR, Aleppo, Syria.

(*Corresponding author: Eng. Abderazzak Asoud. E-Mail: abdsoud1@hotmail.com).

Received: 13/07/ 2015                                     Accepted: 03/08/ 2015

Abstract

This study was conducted using 12 durum wheat genotypes at Izraa Research Station, Daraa governorate in the southern part of Syria during the growing season (2012 – 2011). The study aimed to identify some physiological characters associated with yield improvement in durum wheat grown under water deficit. The results showed that water stress at tillering stage caused a decrease in all physiological traits (chlorophyll content, membrane stability index, leaf water Potential, and chlorophyll fluorescence) in addition a decrease in grain yield. It was observed that the grain yield was the highest in genotypes H.8150, and Cham5 (216.1 216 g) respectively, and these genotypes recorded the highest value significantly in the studied physiological characters. The results clearly indicated the importance of these physiological traits in the development of high yield varieties of durum wheat under water deficit stress, therefore using of these physiological traits in breeding programmers could be effective in improvement the ability of durum wheat crop to be tolerance under water deficit stress.

Keywords:  Durum wheat, Water deficit stress, Physiological traits.

Full paper in Arabic:

بعض الصفات الفيزيولوجية التي تسهم في تحسين قدرة محصول القمح القاسي على تحمل الإجهاد المائي