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Genome wide association mapping of Pyrenophora teres f. maculata and Pyrenophora teres f. teres resistance loci utilizing natural Turkish wild and landrace barley populations

View ORCID ProfileShaun J. Clare, Arzu Çelik Oğuz, Karl Effertz, Roshan Sharma Poudel, Deven See, Aziz Karakaya, View ORCID ProfileRobert S. Brueggeman
doi: https://doi.org/10.1101/2021.06.07.447398
Shaun J. Clare
*Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States, 99163
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  • ORCID record for Shaun J. Clare
Arzu Çelik Oğuz
†Department of Plant Protection, Faculty of Agriculture, Ankara University, Dışkapı, Ankara, Turkey, 06110
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Karl Effertz
*Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States, 99163
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Roshan Sharma Poudel
‡Sygenta Seed Inc., Durham, NC, United States, 27709
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Deven See
§Wheat Health, Genetics and Quality Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, WA, United States, 99163
**Department of Plant Pathology, Washington State University, Pullman, WA, United States, 99163
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Aziz Karakaya
†Department of Plant Protection, Faculty of Agriculture, Ankara University, Dışkapı, Ankara, Turkey, 06110
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Robert S. Brueggeman
*Department of Crop and Soil Sciences, Washington State University, Pullman, WA, United States, 99163
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  • ORCID record for Robert S. Brueggeman
  • For correspondence: bob.brueggeman@wsu.edu
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ABSTRACT

Unimproved landraces and wild relatives of crops are sources of genetic diversity that were lost post domestication in modern breeding programs. To tap into this rich resource, genome wide association studies in large plant genomes have enabled the rapid genetic characterization of desired traits from natural landrace and wild populations. Wild barley (Hordeum spontaneum), the progenitor of domesticated barley (H. vulgare), is dispersed across Asia and North Africa, and has co-evolved with the ascomycetous fungal pathogens Pyrenophora teres f. teres and P. teres f. maculata, the casual agents of the diseases net form of net blotch and spot form of net blotch, respectively. Thus, these wild and local adapted barley landraces from the region of origin of both the host and pathogen represent a diverse gene pool to identify new sources of resistance, due to millions of years of co-evolution. The barley - P. teres pathosystem is governed by complex genetic interactions with dominant, recessive, and incomplete resistances and susceptibilities, with many isolate-specific interactions. Here we provide the first genome wide association study of wild and landrace barley from the Fertile Crescent for resistance to both forms of P. teres. A total of 14 loci, four against P. teres f. maculata and ten against Pyrenophora teres f. teres, were identified in both wild and landrace populations, showing that both are genetic reservoirs for novel sources of resistance. We also highlight the importance of using multiple algorithms to both identify and validate additional loci.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted June 08, 2021.
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Genome wide association mapping of Pyrenophora teres f. maculata and Pyrenophora teres f. teres resistance loci utilizing natural Turkish wild and landrace barley populations
Shaun J. Clare, Arzu Çelik Oğuz, Karl Effertz, Roshan Sharma Poudel, Deven See, Aziz Karakaya, Robert S. Brueggeman
bioRxiv 2021.06.07.447398; doi: https://doi.org/10.1101/2021.06.07.447398
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Genome wide association mapping of Pyrenophora teres f. maculata and Pyrenophora teres f. teres resistance loci utilizing natural Turkish wild and landrace barley populations
Shaun J. Clare, Arzu Çelik Oğuz, Karl Effertz, Roshan Sharma Poudel, Deven See, Aziz Karakaya, Robert S. Brueggeman
bioRxiv 2021.06.07.447398; doi: https://doi.org/10.1101/2021.06.07.447398

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