Reaction of tritordeum to Fusarium culmorum and Septoria nodorum |
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| Authors: | D Rubiales C H A Snijders P Nicholson A Martín |
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| Institution: | (1) Institute for Sustainable Agriculture, CSIC, Apdo. 4084, 14080 Córdoba, Spain;(2) DLO-Centre for Plant Breeding and Reproduction Research (CPRO_DLO), P.O. BOX 16, 6700 AA Wageningen, the Netherlands;(3) Cambridge Laboratory, IPSR, Colney Lane, NR4 7UJ Norwich, U.K. |
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| Abstract: | Summary
Hordeum chilense is a wild barley extensively used in wide crosses in the Triticeae. It could be a valuable source of resistance to Fusarium culmorum and Septoria nodorum. Some H. chilense x Triticum spp. amphiploids, named tritordeums, were more resistant than the parental wheat line to these diseases, others were not. Average contents of ergosterol and deoxynivalenol (DON) suggested that resistance to colonization by Fusarium was the highest for Hordeum chilense, followed by tritordeum and wheat in decreasing order. In particular, the H. chilense genotypes H7 and H17 enhanced the wheat resistance to F. culmorum in its tritordeum offsprings. Resistance to S. nodorum in tritordeum was not associated with tall plant height. There is sufficient genetic variation for resistance to F. culmorum and S. nodorum among tritordeum to allow the breeding of lines combining short straw and resistance to both diseases. |
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| Keywords: | wheat tritordeum Hordeum chilense Fusarium culmorum Septoria nodorum scab deoxynivalenol ergosterol resistance Triticum spp |
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