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Molecular examination of a chromosome region that controls resistance to potato Y and A potyviruses in potato

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Abstract

 The gene Ry adg that confers resistance to potato Y potyvirus (PVY) in the cultivated potato [Solanum tuberosum subsp. andigena, line 2x(v-2)7] is located on chromosome XI in a segment that contains three other known resistance genes in other syntenic solanaceous species. One of them is the gene N that controls resistance to tobacco mosaic tobamovirus in tobacco and has previously been isolated and sequenced. Three sequence-related, resistance gene-like (RGL) DNA fragments (354–369 bp) highly homologous to the gene N were PCR-amplified from the potato line 2x(v-2)7. Two RGL fragments (79 and 81% homologous to the N gene) co-segregated with Ry adg among the 77 F1 progeny tested. These RGLs may originate from a resistance gene family on chromosome XI. The potato line 2x(v-2)7 also expressed resistance to potato A potyvirus (PVA), which was controlled by another locus on chromosome XI mapped ca. 6.8 cM distal to Ry adg .

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Authors and Affiliations

  1. Institute of Biotechnology, Viikki Biocenter 1, P.O. Box 56, FIN-00014 University of Helsinki, Finland, , , , , , FI

    J. H. Hämäläinen & V. A. Sorri

  2. Department of Biotechnological Science, Kinki University, Uchita, Wakayama, 649-64, Japan, , , , , , JP

    K. N. Watanabe

  3. Max-Planck-Institut für Züchtungsforscung, Carl-von-Linné-weg 10, D-50829 Köln, Germany, , , , , , DE

    C. Gebhardt

  4. Institute of Biotechnology, P.O. Box 56, FIN-00014 University of Helsinki, Finland, , , , , , FI

    J. P. T. Valkonen

Authors
  1. J. H. Hämäläinen
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  2. V. A. Sorri
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  3. K. N. Watanabe
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  4. C. Gebhardt
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  5. J. P. T. Valkonen
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Received: 18 December 1997 / Accepted: 30 December 1997

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Hämäläinen, J., Sorri, V., Watanabe, K. et al. Molecular examination of a chromosome region that controls resistance to potato Y and A potyviruses in potato. Theor Appl Genet 96, 1036–1043 (1998). https://doi.org/10.1007/s001220050836

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  • DOI: https://doi.org/10.1007/s001220050836

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