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Reactions of Hordeum spontaneum to infection with two cultures of Puccinia hordei from Israel and United States

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Summary

The reactions to infection with two cultures of Puccinia hordei were determined for 292 Hordeum spontaneum (syn. H. vulgare ssp. spontaneum) accessions, collected at 16 sites which encompassed the ecological range of H. spontaneum in Israel. Culture Tel-Aviv was from Israel and culture 57.19 was from the United States. Fifty-two percent of the accessions were resistant to culture Tel-Aviv and 67% were resistant to culture 57.19. Forty-three percent of the accessions were resistant to both cultures. The average infection type (IT) of accessions within sites ranged from 2.7 to 7.5 on a 0–9 rating scale. The results showed that the presence of Ornithogalum species, the alternate hosts of P. hordei, may increase the percentage of H. spontaneoum accessions resistant to P. hordei. More accessions were resistant at sites where humidity at 1400 was higher, the annual evaporation was lower, and where the glumes were shorter. Kernel weight and annual rainfall was not correlated with resistance. A lower percentage of H. spontaneum accessions were resistant to P. hordei culture Tel-Aviv from Israel than to culture 57.19 from the United States. In a previous study a lower percentage of H. spontaneum accessions also was found to be resistant to a culture of Erysiphe graminis hordei from Israel than to cultures from other countries. Previous studies also have shown that cultures of P. hordei and E. graminis hordei from Israel have many genes for virulence on barley, and that H. spontaneum accessions from Israel have many genes for resistance to these two pathogens. Previous results and the results reported in this paper support the hypothesis of coevolution of resistant host genes and virulent pathogen genes where hosts and pathogens have coexisted for many thousand years.

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Authors and Affiliations

  1. Germplasm Quality and Enhancement Laboratory, Plant Genetics and Germplasm Institute, Beltsville Agricultural Research Center, USDA, ARS, 20705, Beltsville, MD, USA

    J. G. Moseman

  2. Institute of Evolution, University of Haifa, Mount Carmel, 31999, Haifa, Israel

    E. Nevo

  3. Department of Agronomy, Assiut University, Assiut, Egypt

    M. A. EL-Morshidy

Authors
  1. J. G. Moseman
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  2. E. Nevo
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  3. M. A. EL-Morshidy
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Moseman, J.G., Nevo, E. & EL-Morshidy, M.A. Reactions of Hordeum spontaneum to infection with two cultures of Puccinia hordei from Israel and United States. Euphytica 49, 169–175 (1990). https://doi.org/10.1007/BF00027267

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  • DOI: https://doi.org/10.1007/BF00027267

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