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EDGE: Interactions among viruses and consequences for the transmission dynamics. - HH1762SFV

Description
To minimise the posibility of over-rugulation and unjustified commercial constraint by national competent authorities while taking appropriate care of the agricultural environment it is proposed to measure the prospect of enhanced rates of evolution of novel viral pathotypes by gentic recombination amoung coinfecting virus taxa in wild species. Brassica species span the range from annual through biennial to perennial and are cultivated widely in UK- bieng grown for direct human consumption or industrial purposes. Some Brassicas (eg. napus) are authorisedfor commercialisation after genetic manipulation to confer herbicide tolerence. Luteoviruses demonstrate rampant recombination and are chimeras which include sequences attributable to carmoviruses and sobemoviruses. Co-infection of wild B. nigra with these viruses (beet western yellows luteovirus, turnip crinkle carmovirus and turnip rosette sobemovirus) is expected (having been observed in neighbouring B. oleracea on the cliffs of Dorset). The work will provide a measure of coinfection in the annula (B. nigra) and will experimentally measure consequences for virus-virus: virus-host and virus-vector coevolution. The work will specificaly address the impact on aphid behaviour of anthocyanescence that is associated with luteovirus invasion abd the degree to which coinfection facilitates accumulation, invasion, and other factors impacting on transmission dynamics. The data will be used to inform the regulatory authorities in matters pertaining to planned release of genetically manipulated crops containing virus-derived sequences. Since luteoviruses, carmoviruses and sobemoviruses infect a diverse range of staple food crops (including grasses, umbellifers, legumes, sugar beet and potatoes), the policy relevence is not restricted to brassicas and their viruses. End-users of the output will include agroindustry, regulatory agencies (HSE, MAFF, EA, DETR), the plant breeding community, conservation agencies and the ecological science community.
Objective
It is proposed to measure the prospect of enhanced rates of evolution of novel viral pathotypes by genetic recombination among coinfecting virus taxa in wild species.
Project Documents
• Executive Summary : EDGE: Interactions among viruses and consequences for the transmission dynamics.   (27k)
Time-Scale and Cost
From: 1998

To: 2001

Cost: £40,970
Contractor / Funded Organisations
Natural Environment Research Council
Keywords
Farming              
Horticulture              
Viruses              
Fields of Study
Horticulture
Horticulture