The resistance of the perennial ryegrass cultivar Endura to ryegrass mosaic virus |
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| Authors: | R W GIBSON R D WOODS S PETA PICKERING |
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| Institution: | Rothamsted Experimental Station, Harpenden, Hertfordshire, UK |
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| Abstract: | The perennial ryegrass cv. Endura is particularly resistant to infection with two ryegrass mosaic virus isolates, RMV-Roth and RMV-Sax. A few plants appeared immune to RMV-Roth but were infected by RMV-Sax. Two plants that developed only mild symptoms after infection with RMV-Roth contained few virus particles, but passage through these resistant plants caused no detectable change in the virulence of RMV-Roth towards S 22 Italian ryegrass. In offsets derived from one of these resistant plants, RMV-Sax caused severe symptoms and attained a high virus concentration but it was unable to infect if the plant was already infected with RMV-Roth. |
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