Genotypic differences in wheat Al tolerance |
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Authors: | Z. Rengel V. Jurkic |
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Affiliation: | (1) Department of Plant Science, Waite Agricultural Research Institute, University of Adelaide, 5064 Glen Osmond, S.A., Australia;(2) Institute for Agroecology, Faculty of Agriculture, Svetosimunska 25, 41000 Zagreb, Croatia |
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Abstract: | Summary Aluminium tolerance of 83 genotypes from Croatian and Yugoslav Triticum aestivum germplasm was evaluated in nutrient solutions having Al3+ activities of 0, 12.5 and 25 M. Relative root length (25 M Al3+/0 Al) of various genotypes ranged from 2 to 97% (from very sensitive to tolerant to Al). No genotype with Al tolerance close to that of very tolerant cultivar Atlas-66 was found. Soil, climatic, fertilization, and liming effects that wheat plants giving seeds for the nutrient solution Al-tolerance screening had been subjected to during their growth cycle did not influence the Al-tolerance ranking. Significant correlation was found between screening wheat for Al tolerance in nutrient solutions and in acid Pseudogley soil amended with five rates of limestone in a greenhouse experiment. Seed protein concentration was significantly related to the Al-tolerance ranking (r2 = 0.962). Such a significant correlation was not obtained in a case of rheological and other quality characteristics of seeds. Al-tolerant wheat genotypes identified in this study will be used in breeding for improved Al tolerance.Abbreviations HSD Tukey's Honestly Significant Difference - RRL-2 relative root length, in % (12.5 M Al3+/0 Al) - RRL-4 relative root length, in % (25 M Al3/0 Al) |
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Keywords: | aluminium root growth screening tolerance Triticum aestivum wheat |
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