Biological properties and molecular characterization of beet chlorosis virus (BChV)

Biological properties and molecular characterization of beet chlorosis virus (BChV) Two distinct viruses belonging to the Polerovirus genus, in the family Luteoviridae , have been described as being able to induce mild yellowing on sugar beet: Beet mild yellowing virus (BMYV) and more recently, beet chlorosis virus (BChV). We have analysed biological properties and molecular organisation of two strains of BChV, one collected in England and the second from California. The biological data suggested that BChV displayed a narrower host range compared to BMYV and Beet western yellows virus lettuce isolate (BWYV). The complete genomic RNA sequence of the American isolate BChV-California and the European isolate BChV-2a showed a genetic organisation and expression typical of other Polerovirus members including 6 open reading frames (ORFs). Interspecific and intraspecific phylogenetic studies suggested that BChV arose by recombination events between a Polerovirus -like ancestor donating P0 and the replicase complex and either a BMYV or a BWYV progenitor providing the 3′ ORFs (3, 4 and 5). The 5′- and 3′-parts of the BChV genome have evolved differently in the two continents, possibly due to different selection pressures to allow adaptation to the various environments, hosts and vectors. BChV is a distinct species of the Polerovirus genus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Biological properties and molecular characterization of beet chlorosis virus (BChV)

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Publisher
Springer-Verlag
Copyright
Copyright © 2002 by Springer-Verlag/Wien
Subject
Legacy
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s007050200023
Publisher site
See Article on Publisher Site

Abstract

Two distinct viruses belonging to the Polerovirus genus, in the family Luteoviridae , have been described as being able to induce mild yellowing on sugar beet: Beet mild yellowing virus (BMYV) and more recently, beet chlorosis virus (BChV). We have analysed biological properties and molecular organisation of two strains of BChV, one collected in England and the second from California. The biological data suggested that BChV displayed a narrower host range compared to BMYV and Beet western yellows virus lettuce isolate (BWYV). The complete genomic RNA sequence of the American isolate BChV-California and the European isolate BChV-2a showed a genetic organisation and expression typical of other Polerovirus members including 6 open reading frames (ORFs). Interspecific and intraspecific phylogenetic studies suggested that BChV arose by recombination events between a Polerovirus -like ancestor donating P0 and the replicase complex and either a BMYV or a BWYV progenitor providing the 3′ ORFs (3, 4 and 5). The 5′- and 3′-parts of the BChV genome have evolved differently in the two continents, possibly due to different selection pressures to allow adaptation to the various environments, hosts and vectors. BChV is a distinct species of the Polerovirus genus.

Journal

Archives of VirologySpringer Journals

Published: Apr 1, 2002

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