Heritability of clover rot resistance (Sclerotinia spp.) in red clover (Trifolium pratense) populations

Tim Vleugels, Erik Van Bockstaele

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    European red clover (Trifolium pratense) crops are susceptible to clover rot, a destructive disease caused by Sclerotinia trifoliorum or S. sclerotiorum. The lack of knowledge on the heritability of clover rot resistance is, among other reasons, responsible for the slow progress of resistance breeding. In this paper, we acquired insight in the heritability of clover rot resistance through divergent selection by our high-throughput bio-test on an experimental diploid population. The disease susceptibility indices of the first generation after selection for susceptibility and the first and the second generation after selection for resistance were compared with the susceptibility of the original population. The susceptible population (79.2%), the original population (70.5%) and the first generation resistant population (62.3%) differed significantly in susceptibility (p < 0.001). The first (62.3%) and second generation resistant population (60.0%) did not differ significantly in susceptibility. The heritability (h2) of clover rot resistance was low: 0.34 and 0.07 in the first and second cycle of selection respectively. This indicates that mass selection is not suitable to improve clover rot resistance. Family selection may allow a sustained increase in resistance for multiple generations.
    Translated title of the contributionErfelijkheid van klaverrot resistentie (Sclerotinia spp.) in rode klaver (Trifolium pratense) populaties
    Original languageEnglish
    Title of host publicationCommunications in Agricultural and Applied Biological Sciences
    Number of pages4
    Place of PublicationGent
    Publication date2014
    Publication statusPublished - 2014
    Event66th ISCP - Gent, Gent, Belgium
    Duration: 20-May-2014 → …


    • B390-phytopathology
    • B390-breeding


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    • 66th ISCP

      Nick Berkvens (Participant)


      Activity: Participating in or organising an eventOrganisation and participation in conference

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