دراسة بعض الصفات الفيزيولوجية التي تسهم في تحسين قدرة محصول القمح القاسي على تحمل إجهاد نقص الماء

الملخص EN

This study was conducted on 12 genotypes of durum wheat at Izraa Research Station, Daraa governorate in the southern part of Syria, during the growing season, 2010 – 2011, in order to identify some physiological traits associated with yield improvement in durum wheat grown under water deficit.

Results showed that deficit of water at heading stage caused a decrease in all physiological traits (chlorophyll content, membrane stability index, leaf water Potential, and chlorophyll fluorescence) in addition to a decrease in grain yield.

It was observed that the grain yield was the highest in the genotypes Cham5, H.8150, D.41282 and these genotypes recorded the highest value of the studied physiological traits, The result clearly indicated to the importance of these physiological traits in development of high yield varieties of durum wheat under water deficit stress.

Therefore, using of these physiological traits in breeding program could be effective in improvement the ability of durum wheat crop to indure water deficit stress.