Postulation of leaf (brown) rust resistance genes in 70 wheat cultivars grown in the United Kingdom |
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| Authors: | D. Singh R.F. Park R.A. McIntosh |
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| Affiliation: | (1) Wet-Lowlands Mainland Programme-Bubia, National Agriculture Research Institute, PO Box 1639, Lae, Morobe Province, 411, Papua New Guinea;(2) Plant Breeding Institute Cobbitty, University of Sydney, Private Mail Bag 11, Camden, NSW, 2570, Australia |
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| Abstract: | Multi-pathotype tests on 70 U.K. wheat cultivars permitted postulation of eight known seedling genes for resistance to Puccinia recondita f. sp.tritici either singly or in combinations. The most commonly detected gene was Lr13 (present in approximately 57% of cultivars), followed by Lr26 (22%), Lr37 (20%), Lr10 (17%), Lr17b (LrH) (10%), Lr1 (7%), Lr3a (6%) and Lr20(4%). This information permitted assessments of adult plant resistance (APR) in some cultivars, in field nurseries inoculated with pathotypes of P. recondita f. sp. tritici of known pathogenicities for characterized seedling resistance genes. APR was identified in eleven cultivars, including Avalon and Maris Ranger, which lacked detectable seedling resistance genes. The results provided a better understanding of specific resistances in the cultivars tested than was available from previous reports. This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | brown rust gene postulation leaf rust multi-pathotype tests Puccinia recondita f. sp. tritici Triticum aestivum wheat |
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