Various forms of Trifolium pratense L. and other Trifolium spp. as possible genetic resources for improvement of Sclerotinia clover rot resistance in red clover

Arseniuk, E.

Report of a working group on forages fourth meeting held in Budapest, Hungary, 28-30 October 1991: 46-58


Accession: 002543201

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Resistance to S. trifoliorum was examined in red clover strains from Poland and elsewhere, using artificial inoculation in the field and the greenhouse. Disease incidence was measured 3 weeks after inoculation in the greenhouse and in late autumn or early spring in the field. Percentage of dead plants was used as a measure of susceptibility. Data are tabulated on disease reactions in 24 varieties and 31 wild ecotypes of T. pratense, and in 39 varieties of various fodder legume species and in a further 18 species (mainly Trifolium and Medicago spp.). A high degree of resistance was found in some accessions. Information is also presented on progress in breeding and on the role of polyploidy in resistance.