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Correlation between resistance to late blight in foliage and tubers in potato clones from parents of contrasting resistance

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Summary

The relationship between resistance to late blight in foliage and tuber was examined on 50 clones of each of five progenies from crosses where one parent was resistant in both foliage and tuber and the other susceptible. Foliage resistance was assessed in a field trial and tuber resistance in a laboratory test on glasshouse-grown tubers. The genetical and environmental components of variance and the phenotypic and genetical correlations between foliage and tuber blight scores were determined for each progeny. Foliage and tuber resistance were correlated, indicating either that both are determined by the same genes or by different linked genes.

The environmental component of variation was greater for tuber blight than foliage blight. We suggest that the most effective way of selecting for resistance to both aspects of the disease in a breeding programme is to select those resistant in the foliage and then screen them for tuber resistance.

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References

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Authors and Affiliations

  1. Scottish Crop Research Institute, Invergowie, DD2 5DA, Dundee, Scotland, UK

    Helen E. Stewart, J. E. Bradshaw & R. L. Wastie

Authors
  1. Helen E. Stewart
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  2. J. E. Bradshaw
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  3. R. L. Wastie
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Stewart, H.E., Bradshaw, J.E. & Wastie, R.L. Correlation between resistance to late blight in foliage and tubers in potato clones from parents of contrasting resistance. Potato Res 37, 429–434 (1994). https://doi.org/10.1007/BF02358357

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  • DOI: https://doi.org/10.1007/BF02358357

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