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Genetic Resistance to Turnip mosaic virus (TuMV) in Brassicas

By John A. Walsh, Carol E. Jenner, J.M. Bambridge, Rachel L. Rusholme, S. Hughes, Erin E. Higgins, I.A.P Parkin, Guy C. Barker and Derek J. Lydiate


Turnip mosaic virus (TuMV) is a member of the Potyvirus genus, infects a wide range of cultivated plant species and causes significant economic losses in Brassica crops (Shattuck, 1992). It is a positive strand RNA virus (genome comprises 9830-9835 nucleotides) and is the subject of advanced molecular characterisation in terms of its interaction with brassicas (Walsh & Jenner, 2002). Plant genes for resistance to TuMV have been mapped in lettuce (Tu, Robbins et al., 1994), B. napus(TuRB01, Walsh et al., 1999; TuRB03, Hughes et al., 2003; TuRB04 and TuRB05, Walsh & Lydiate, unpublished) and B. rapa (TuRB01b, Rusholme et al., unpublished). All these brassica genes are dominant R genes that control resistance to narrow spectra of TuMV isolates; the viral avirulence determinants for these genes have been identified (Jenner et al., 2000; Walsh et al., 2002; Jenner et al., 2002; Jenner et al., 2003)

Topics: S1
Publisher: International Society for Horticultural Science (ISHS)
Year: 2008
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