Summary
To locate the genes controlling field and laboratory predictors of drought tolerance, chromosome addition lines of Agropyron elongatum (donor) into the genetic background of Chinese Spring (recipient) were tested in the field, green house and laboratory conditions. Disomic addition lines revealed significant differences for relative water content (RWC), relative water loss (RWL), water use efficiency (WUE), chlorophyll flourescence (CHF) and stomatal resistance (SR), indicating genetic variation and possibility of selection for improving drought tolerance. Physiological indicators of relative water loss and water use efficiency showed a great contribution in the regression equation of yield under stress. Based on the physiological multiple selection index (MSI) most of the QTLs controlling physiological indices of drought tolerance were located on chromosomes 3E, 5E and 7E. Evaluation of disomic addition lines indicated that most of the genes monitoring stress tolerance index (STI) and germination stress index (GSI) are located on chromosomes 3E, 5E and 7E. It is therefore, suggested that these lines to be used in the breeding programs to transfer useful drought tolerance traits into wheat genetic background.
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Farshadfar, E., Mohammadi, R., Farshadfar, M. et al. Locating QTLs controlling field and laboratory predictors of drought tolerance in Agropyron using multiple selection index. CEREAL RESEARCH COMMUNICATIONS 32, 17–24 (2004). https://doi.org/10.1007/BF03543275
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DOI: https://doi.org/10.1007/BF03543275