Tolerance to paraquat is correlated with the traits associated with water stress tolerance in segregating F2 populations of barley and wheat |
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| Authors: | Ahu Altinkut Kemal Kazan Zeliha Ipekci Nermin Gozukirmizi |
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| Affiliation: | (1) Research Institute for Genetic Engineering and Biotechnology, Tubitak, Marmara Research Center, P.O. Box 21, 41470 Gebze-Kocaeli, Turkey;(2) Cooperative Research Centre for Tropical Plant Pathology, The University of Queensland, John Hines Building, St. Lucia, Brisbane, Queensland, 4072, Australia;(3) Faculty of Science, Department of Biology, Vezneciler, The University of Istanbul, Istanbul, Turkey |
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| Abstract: | To identify scorable marker traits that can be used in cereal breeding programs for selecting drought tolerant individuals, we investigated the correlation among the drought-associated traits in two F2 populations derived from the crosses made between drought tolerant and sensitive barley and wheat parental genotypes. The parental genotypes of these crosses also differed by at least three other traits – paraquat tolerance, leaf size, and the relative water content. These three traits were scored in two F2populations of 80 individuals for each barley and wheat cross. Analysis of results indicated that the enhanced tolerance to paraquat was correlated with reduced leaf size and increased relative water content, two traits associated with water stress phenotypes of the drought tolerant barley and wheat parents. Our results suggested that the selection based on paraquat tolerance istechnically less demanding and thus useful for rapid screening of individuals for enhanced drought tolerance in segregating populations. This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | drought tolerance Hordeum vulgare Triticum aestivum paraquat tolerance |
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