Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Opportunities of New Plant Breeding Techniques
    Schaart, Jan ; Riemens, M.M. ; Wiel, C.C.M. van de; Lotz, L.A.P. ; Smulders, M.J.M. - \ 2015
    Wageningen : Wageningen UR - 24
    plantenveredeling - plantenveredelingsmethoden - resistentieveredeling - cisgenese - intragenic recombination - mutagenese - dna-methylering - bloei - plant breeding - plant breeding methods - resistance breeding - cisgenesis - intragenic recombination - mutagenesis - dna methylation - flowering
    This brochure gives an overview of new plant breeding techniques. This overview is based on a more technical review of the scientific literature, published in a separate report. The overview presents the opportunities and limitations of these techniques from the point of view of potential applications in plant breeding with promising results for improving agricultural sustainability.
    RNA Elements in Open Reading Frames of the Bluetongue Virus Genome Are Essential for Virus Replication
    Feenstra, F. ; Gennip, H.G.P. van; Water, S.G.P. van de; Rijn, P.A. van - \ 2014
    PLoS ONE 9 (2014)3. - ISSN 1932-6203
    polymerase-chain-reaction - intragenic recombination - insect cells - protein ns2 - fever virus - vp6 protein - viral-rna - segment - binding - core
    Members of the Reoviridae family are non-enveloped multi-layered viruses with a double stranded RNA genome consisting of 9 to 12 genome segments. Bluetongue virus is the prototype orbivirus (family Reoviridae, genus Orbivirus), causing disease in ruminants, and is spread by Culicoides biting midges. Obviously, several steps in the Reoviridae family replication cycle require virus specific as well as segment specific recognition by viral proteins, but detailed processes in these interactions are still barely understood. Recently, we have shown that expression of NS3 and NS3a proteins encoded by genome segment 10 of bluetongue virus is not essential for virus replication. This gave us the unique opportunity to investigate the role of RNA sequences in the segment 10 open reading frame in virus replication, independent of its protein products. Reverse genetics was used to generate virus mutants with deletions in the open reading frame of segment 10. Although virus with a deletion between both start codons was not viable, deletions throughout the rest of the open reading frame led to the rescue of replicating virus. However, all bluetongue virus deletion mutants without functional protein expression of segment 10 contained inserts of RNA sequences originating from several viral genome segments. Subsequent studies showed that these RNA inserts act as RNA elements, needed for rescue and replication of virus. Functionality of the inserts is orientation-dependent but is independent from the position in segment 10. This study clearly shows that RNA in the open reading frame of Reoviridae members does not only encode proteins, but is also essential for virus replication
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