Temperature-dependent resistance to crown rust infection in perennial ryegrass, Lolium perenne

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Type Article
Original languageEnglish
Pages (from-to)93-95
Number of pages3
JournalPlant Breeding
Issue number1
Publication statusPublished - Mar 2000
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Differences were found in the expression of resistance of perennial ryegrass, Lolium perenne, cultivars to crown rust, Puccinia coronata Corda, when plants were incubated at either 10 degrees C or 25 degrees C. In an extreme example, all the genotypes of 'Carrick' were resistant at 10 degrees C but susceptible at 25 degrees C. The variation between cultivars was due both to a general increase in expression of susceptibility and the proportion of plants which became susceptible. A BC1 line containing a stay-green gene derived from Festuca pratensis was insensitive to temperature, while a sister line was sensitive.


  • Lolium perenne, Puccinia coronata, crown rust resistance, temperature sensitivity