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. Isolation and characterization of euplasmic wheat-barley chromosome addition lines. Heredity 46: 161–174 Sparrow D.H.B. Isolation and characterization of euplasmic wheat-barley chromosome

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Cho, S., Garvin, F.D., Muehlbauer, J.G. 2006. Transcriptome analysis and physical mapping of barley genes in wheat-barley chromosome addition lines. Genetics 174 :1277–1285. Muehlbauer J

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172 Friebe, B., Tuleen, N., Gill, B. S. (1999): Development and identification of a set of Triticum aestivum-Aegilops geniculata chromosome addition lines. Genome , 42 , 374

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., Sutka, J. 1996: Drought tolerance studies on wheat/rye disomic chromosome addition lines. Acta Agron. Hung. , 44 , 121-126. Drought tolerance studies on wheat/rye disomic chromosome addition lines

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Kőszegi B., Farshadfar E., Vágújfalvi A., Sutka J. (1996): Drought tolerance studies on wheat/rye disomic chromosome addition lines. Acta Agron. Hung. , 44, 121–126. Sutka J. Drought

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and characterization of euplasmic wheat-barley chromosome addition lines. Heredity , 46 , 161–174. Sparrow D. H. B. Isolation and characterization of euplasmic wheat

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. Features of alloplasmic wheat-barley substitution and addition lines ( Hordeum marinum subsp. gussoneanum) – Triticum aestivum . Russ. J. Genet. 45 : 1223 – 1229 . Ren , T. , Yang

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2434 2438 Mohammadi, R., Farshadfar, E., Aghaee-Sarbarzeh, M., Sutka, J. 2003. Locating QTLs controlling drought tolerance criteria in rye using disomic addition lines. Cereal

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barley chromosomes on the flowering time of new wheat/winter barley addition lines in various environments . Euphytica 195 : 45 – 55 . Fu , D. , Szucs , P. , Yan , L. , Helguera

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Water deficiency is a major constraint in wheat production and the most important contributor to yield reduction in the semiarid regions of the world. species related to wheat are valuable genetic sources for different traits including resistance/tolerance to biotic and abiotic stresses. To locate the genes controlling the physiological and agronomic criteria of drought tolerance, disomic addition lines of secale cereale cv. Imperial (donor) into the genetic background of Triticum aestivum cv. Chinese Spring (recipient) were tested under field, greenhouse and laboratory conditions. Disomic addition lines exhibited significant differences for relative water content (RWC), relative water loss (RWL), water use efficiency (WUE) and stomatal resistance (SR), indicating the presence of genetic variation and the possibility of selection for improving drought tolerance. Three physiological variables, RWL, WUE and SR, with high correlation with the stress tolerance index (STI) and germination stress index (GSI), contributed 69.7% to the variability of yield under stress (Ys) in the regression equation. Based on the physiological multiple selection index (MSI) most of the QTLs controlling physiological indices of drought tolerance were located on chromosomes 3R, 5R and 7R. The contribution of addition line 7R to the MSI was 47%. The evaluation of disomic addition lines for STI and GSI revealed that most of the QTLs involved in these quantitative criteria of drought tolerance are located on 3R and 7R. Cluster analysis and three dimensional plots of Ys, yield potential (Yp) and MSI indicated that 3R and 7R are the most important chromosomes carrying useful genes for improving drought tolerance.

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