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Dominant variance has an important role in downy mildew resistance in cucumber

Horticulture, Environment, and Biotechnology volume 52, Article number: 422 (2011) Cite this article

Abstract

Downy mildew inflicts severe damage on cucurbits in humid areas of production throughout the world. The genetics of resistance to downy mildew (Pseudoperonospora cubensis) in the cucumber (Cucumis sativus L.) was studied by the means of a half diallel table between 6 inbred lines. Decomposition of dominance variation indicated that the dominance effect was not unidirectional and that dominant genes were not uniformly distributed among the parents. These facts were confirmed and using a further detailed Hayman’s graphical analysis. Narrow-sense heritability estimates were 0.42 so the breeders are able to use selection for this trait. In other hands the heterosis in some crosses was high so breeders are able to use specific cross to produce hybrid with high level resistance.

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Authors and Affiliations

  1. Department of Horticultural Science, University of Guilan, Rasht, Iran

    Jamal-Ali Olfati & Gholam-Ali Peyvast

  2. Department of Agronomy, University of Guilan, Rasht, Iran

    Habibollah Samizadeh & Babak Rabiei

  3. Department of Plant Pathology, University of Guilan, Rasht, Iran

    S. Akbar Khodaparast

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  1. Jamal-Ali Olfati
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  2. Habibollah Samizadeh
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  3. Gholam-Ali Peyvast
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  4. S. Akbar Khodaparast
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  5. Babak Rabiei
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Correspondence to Jamal-Ali Olfati.

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Olfati, JA., Samizadeh, H., Peyvast, GA. et al. Dominant variance has an important role in downy mildew resistance in cucumber. Hortic. Environ. Biotechnol. 52, 422 (2011). https://doi.org/10.1007/s13580-011-0049-0

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  • DOI: https://doi.org/10.1007/s13580-011-0049-0

Additional key words

  • Cucumis sativus
  • diallel
  • hymen analysis
  • inheritance
  • Pseudoperonospora cubensis