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Effects of heat tolerance on expression of resistance toPresudomonas solanacearum E. F. Smith in potato

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Summary

Twelve potato clones with different genetic background for resistance to bacterial wilt and adaptation were tested for resistance to a race 1 and a race 3 isolate of the pathogen at three locations in the Philippines representing different ranges of ambient temperature. The results showed that the genes for heat tolerance are crucial for resistance. Stability analysis indicated that clones with both resistance and heat tolerance genes displayed higher and more stable resistance to the race 1 isolate than those clones having only resistance genes. The latter group tended to have higher values of both regression of disease index on environmental index and deviation from the regression in the stability analysis. Host — pathogen interaction effects were found to be statistically significant but small compared to main effects of isolates and clones. The involvement of genes with different effects on wilt resistance is discussed. Introduction

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Authors and Affiliations

  1. Potato Research Station, Thaiphien, Dalat, Vietnam

    Pham X. Tung

  2. Department of Plant Breeding, Wageningen Agricultural University, The Netherlands

    John G. Th. Hermsen

  3. International Potato Center (CIP), Box 933, Manila, The Philippines

    Peter Vander Zaag

  4. CIP, Apartado 5969, Lima, Peru

    Peter Schmiediche

Authors
  1. Pham X. Tung
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  2. John G. Th. Hermsen
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  3. Peter Vander Zaag
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  4. Peter Schmiediche
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Tung, P.X., Hermsen, J.G.T., Vander Zaag, P. et al. Effects of heat tolerance on expression of resistance toPresudomonas solanacearum E. F. Smith in potato. Potato Res 35, 321–328 (1992). https://doi.org/10.1007/BF02357713

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  • DOI: https://doi.org/10.1007/BF02357713

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