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.
Seyed Siamak Alavi - Kia; Alireza pour aboughadareh; Mohammad Moghadam vahed; Ali Ashraf Mehrabi; Mohammad Amin Mazimani
Abstract
In order to evaluate the effect of water deficit stress on agronomic and morpho-physiological traits in eight populations of the Triticum urartu species an experiment was experiment was conducted using a split plot design based on a randomized complete block design with three replications at Research ...
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In order to evaluate the effect of water deficit stress on agronomic and morpho-physiological traits in eight populations of the Triticum urartu species an experiment was experiment was conducted using a split plot design based on a randomized complete block design with three replications at Research Station of Faculty of Agriculture, Tabriz University in 2010-2011. Analysis of variance indicated significant differences among populations in approximately all traits except of number of total tillers per plant, total weight of spike, harvest index, chlorophyll index, and duration of grain filling, indicating the existence of genetic variation among populations. Genetic coefficient of variation were high for most traits such as leaf area, biomass, harvest index and grain yield per plant under both stress and control conditions. Based on yield related traits, populations collected from Marivan and Songhor were more drought tolerant. Cluster analysis grouped populations in two clusters that tolerant populations were placed in one separate cluster. In general, results of this study showed that wild einkorn populations (Triticum urartu) of Iran, especially populations from Kermanshah and Kurdistan provinces were more tolerant to water deficit regarding morpho- physiological and agronomic traits.