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A New Pathotype of Pea seedborne mosaic virus Explained by Properties of the P3-6k1- and Viral Genome-Linked Protein (VPg)-Coding Regions

February 2002 , Volume 15 , Number  2
Pages  169 - 171

Charlotte Kristiane Hjulsager , Ole Søgaard Lund , and I. Elisabeth Johansen

Biotechnology Group, Danish Institute of Agricultural Sciences, Thorvaldsensvej 40, opg.8, 2. sal, DK-1871 Frederiksberg C, Denmark

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Accepted 10 October 2001.

A fourth pathotype of Pea seedborne mosaic virus, a member of the genus Potyvirus, was identified by analysis of the infection profile on a panel of Pisum sativum lines. The new pathotype, designated P-3, was able to overcome resistance specified by the sbm-1 resistance gene but could not overcome resistance specified by the sbm-2 resistance gene. This infection profile distinguished P-3 from previously described pathotypes, P-1, P-2, and P-4. Analysis of chimeric viruses demonstrated that properties of the P3-6k1- and viral genome-linked protein (VPg)-coding regions accounted for the infection profile of the new pathotype.

© 2002 The American Phytopathological Society