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Phenotypic & genotypic characterisation of persistent baculovirus infections in populations of the cabbage moth (Mamestra brassicae) within the British Isles

Burden, J. P.; Possee, R. D.; Sait, S. M.; King, L. A.; Hails, R. S.. 2006 Phenotypic & genotypic characterisation of persistent baculovirus infections in populations of the cabbage moth (Mamestra brassicae) within the British Isles. Archives of Virology, 151 (4). 635-649. 10.1007/s00705-005-0657-z

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Abstract/Summary

The genotypic relatedness of persistent baculovirus infections within UK populations of Mamestra brassicae was assessed by sequencing amplified regions from polyhedrin and ie1. Most populations harboured Mamestra brassicae (Mb) nucleopolyhedrosis virus (NPV) which showed very little genotypic variation between populations. However, one population harboured a virus that closely resembled a baculovirus found previously only in Pine Beauty Moth (Panolis flammea) populations in Scotland. Persistent baculoviruses that had emerged spontaneously as lethal, overt infections from two of the insect populations were compared with the type strain of MbNPV and a mixture of P. flammea (Pafl) NPV strains, isolated from a single host, by bioassay in virus-free Spodoptera exigua larvae. Reactivated baculoviruses were as pathogenic as the stock virus and showed phenotypic characteristics closest to the type strain they most resembled genetically. Sequence data from the insect host cytochrome oxidase genes were compared and showed a high degree of sequence conservation between populations and it was not possible to determine whether the persistent baculovirus infections had arisen on many occasions or whether they represented a single initial infection that had spread with the host. However, the presence of two distinct virus genotypes in separate M. brassicae populations suggests multiple colonisations of the host are a possibility

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1007/s00705-005-0657-z
Programmes: CEH Programmes pre-2009 publications > Biodiversity
CEH Sections: _ Pathogen Population Ecology
_ Molecular Virology & Parasitology
ISSN: 0304-8608
Format Availability: Electronic, Print
Additional Information. Not used in RCUK Gateway to Research.: The original publication is available at www.springerlink.com
Additional Keywords: nuclearpolyhedrosis virus, recombinant baculoviruses, vertical transmission, lepidooptera, host, noctuidae, pathogens, larvae
NORA Subject Terms: Biology and Microbiology
Date made live: 04 Jul 2007 10:16
URI: http://nora.nerc.ac.uk/id/eprint/265

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