Alternative hosts and seed transmissibility of soybean blotchy mosaic virus

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dc.contributor.author Strydom, Elrea
dc.contributor.author Pietersen, Gerhard
dc.date.accessioned 2019-04-15T06:28:15Z
dc.date.issued 2018-05
dc.description.abstract Soybean blotchy mosaic virus (SbBMV) is an important virus of soybean in the warmer regions of South Africa. The presence of the virus is associated with blotchy mosaic symptoms on soybean leaves and significant annual yield losses. The virus is a member of the genus Cytorhabdovirus and persists between soybean growing seasons. In this study, multiple specimens of indigenous tree species, other crops and herbaceous weeds surrounding soybean fields with high disease incidences of SbBMV were tested for the presence of SbBMV by RT-PCR in order to determine whether the presence of alternative hosts facilitates the seasonal carry-over of the virus. Commercial soybean cultivars commonly grown in the region were also evaluated for seed transmissibility of the virus. A total of 487 accessions representing 27 different species were screened and one accession each of Flaveria bidentis, Lamium amplexicaule and Gymnosporia buxifolia tested positive for the presence of SbBMV and may serve as possible alternative hosts of SbBMV, allowing over-wintering of the virus when soybean is absent. Symptoms associated with SbBMV infection were not present in any of the 2, 829 seedlings collected from naturally infected SbBMV plants, and none of the 21 seedlings showing various abnormalities and tested by RT-PCR were positive. SbBMV does not appear to be seed transmissible in soybean at an incidence above that which numbers screened would have detected the virus. It was concluded that the presence of alternative plant hosts, functioning as viral reservoirs during the soybean off-season might allow for the re-emergence of the disease early in the soybean production season each year. Future work will investigate the role of Peragallia caboverdensis, the leafhopper vector of SbBMV, and specifically the possible propagative transmission of the virus in the persistence of the disease. en_ZA
dc.description.department Forestry and Agricultural Biotechnology Institute (FABI) en_ZA
dc.description.department Microbiology and Plant Pathology en_ZA
dc.description.embargo 2019-05-01
dc.description.librarian hj2019 en_ZA
dc.description.sponsorship The Association of African Universities (AAU), the Genomics Research Institute (GRI) at the University of Pretoria, South Africa and through the National Research Foundation Incentive Grant for Rated Scientists. en_ZA
dc.description.uri https://link.springer.com/journal/10659 en_ZA
dc.identifier.citation Strydom, E. & Pietersen, G. Alternative hosts and seed transmissibility of soybean blotchy mosaic virus. European Journal of Plant Pathology (2018) 151: 263-268. https://doi.org/10.1007/s10658-017-1361-z. en_ZA
dc.identifier.issn 0929-1873 (print)
dc.identifier.issn 1573-8469 (online)
dc.identifier.other 10.1007/s10658-017-1361-z
dc.identifier.uri http://hdl.handle.net/2263/68974
dc.language.iso en en_ZA
dc.publisher Springer en_ZA
dc.rights © Koninklijke Nederlandse Planteziektenkundige Vereniging 2017. The original publication is available at : https://link.springer.com/journal/10658. en_ZA
dc.subject Soybean blotchy mosaic virus (SbBMV) en_ZA
dc.subject Plant rhabdovirus en_ZA
dc.subject Alternative hosts en_ZA
dc.subject Seed transmissibility en_ZA
dc.subject Soybean en_ZA
dc.title Alternative hosts and seed transmissibility of soybean blotchy mosaic virus en_ZA
dc.type Postprint Article en_ZA


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