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Construction of ‘compound’ rust resistance genes in maize

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Summary

The Rp1 locus of maize is a complex rust resistance locus where multiple resistance genes are clustered. Rare recombination events between Rp1 genes or alleles can produce two or more detectable genes linked in coupling phase. Such ‘compound’ genes can then be manipulated as a single gene in breeding programs. Several compound Rp1 genes, each carrying two or three tightly linked resistance genes, were constructed to test their utility in controlling common rust. While none of the lines carrying single Rp1 genes were resistant to all of the characterized North American P. sorghi biotypes, most of the two component and all of the three component Rp1 complexes were resistant. The potential for utilization of compound resistance genes in other crop species is discussed.

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Authors and Affiliations

  1. Department of Plant Pathology, Kansas State University, 66506, Manhattan, Kansas, USA

    Gongshe Hu & Scot Hulbert

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  1. Gongshe Hu
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  2. Scot Hulbert
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Hu, G., Hulbert, S. Construction of ‘compound’ rust resistance genes in maize. Euphytica 87, 45–51 (1996). https://doi.org/10.1007/BF00022963

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  • DOI: https://doi.org/10.1007/BF00022963

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