ISHS Acta Horticulturae 505: VII International Symposium on Rubus and Ribes
A REVIEW OF RASPBERRY BUSHY DWARF VIRUS AT HRI-EAST MALLING AND THE SITUATION ON A SAMPLE OF COMMERCIAL HOLDINGS IN ENGLAND IN 1995 AND 1996 |
| Authors: | V.H. Knight, D.J. Barbara |
| Keywords: | raspberry bushy dwarf virus, resistance, field infection, discriminating isolates |
| Abstract:
Raspberry bushy dwarf virus (RBDV) has been present in the breeding plots at East Malling for at least 20 years. Although this has caused the loss of some breeding lines, it has provided a unique opportunity to select for resistance to pollen-associated infection. Some cvs and selections have remained free of RBDV for many years, showing that this type of resistance can be exploited effectively and is present in some important cvs such as Leo. At least some of the isolates at HRI-East Malling are resistance-breaking (RB) isolates, able to overcome resistance to graft inoculation with non-RB isolates of RBDV. In commercial plantings, Loganberries have been infected with RB isolates for many years but, until relatively recently, modern raspberry cvs were not infected with RBDV. Surveys in two important raspberry growing regions (Kent and the West Midlands) in 1995 and 1996 identified infected plots of Autumn Bliss, Dinkum, Leo, Glen Moy, Malling Admiral, and M. Delight (the last three cvs are resistant to graft inoculation by non-RB isolates). | |
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