Shakiba Shahmoradi; Mehdi Zahravi
Abstract
To evaluate the effects of water deficit stress in barley germplasm collection of National Gene Bank ofIran, 25 genotypes collected from arid and semi arid provinces of Iran and 3 sample cultivars werestudied in two environments including: non-stressed and water deficit stress. Agronomical, phenologicaland ...
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To evaluate the effects of water deficit stress in barley germplasm collection of National Gene Bank ofIran, 25 genotypes collected from arid and semi arid provinces of Iran and 3 sample cultivars werestudied in two environments including: non-stressed and water deficit stress. Agronomical, phenologicaland morphological traits were measured. Stress indices were calculated to determine tolerant genotypes.Based on correlation coeficiences, STI were better indicator of drought stress tolerance than the otherindices. Based on STI, morphotypes number 16, 24, 25 and 26 shown better stress tolerance potential thanthe other morphotypes. Stepwise regression between stress tolerance index (STI) and quantitave traitsindicates the important role of leaf area and specific leaf area of flag leaf under drought stress condition,in acclimation to drought conditions. It is also concluded that the 100 grain weight is the only trait undernormal condition witch shows a close relation with stress tolerance index.