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dc.contributor.authorMackasmiel, Lucas A.en_US
dc.date.accessioned2014-03-14T20:15:49Z
dc.date.available2014-03-14T20:15:49Z
dc.date.issued2004-07-12en_US
dc.identifier.otheretd-08312004-143153en_US
dc.identifier.urihttp://hdl.handle.net/10919/28836
dc.description.abstractBean pod mottle virus (BPMV, Genus Comovirus, Family: Comoviridae)is an important virus in soybean (Glycine max (L.) Merrill), causing quality and yield loss due to seed coat mottling and seed weight reduction. Although BPMV has been known in Virginia since 1958 and has always been regarded as causing negligible losses, its impact is changing as BPMV incidence has increased in many soybean growing areas of Virginia and the USA in general. From 1997 to 2001, a total of five BPMV isolates (V-W1, V-W2, V-S98-1, V-S98-15 and V-S01-10) were collected in Virginia and characterized. In this study, the effects of these isolates were studied, alone or with Soybean mosaic virus (SMV, Genus Potyvirus, Family Potyviridae) strain SMV G1, and isolates S98-51 and S98-52, on selected soybean cultivars. Individual isolates of BPMV showed variable symptom severity, and resulted in yield loss of between 40.4 to 58.1%, while SMV caused 23.7% in the most severe interactions. Up to 100% yield loss was realized from double inoculations of selected BPMV and SMV isolates, BPMV V-S98-1 + SMV S98-52 and BPMV S98-15 + SMV S98-52 on Hutcheson and Hutcheson Roundup Ready® (BC5) soybeans, respectively. Time of inoculation, a critical factor in the impact of many virus diseases, affected seed coat mottling in four cultivars and seed weight in two cultivars, in tests with four BPMV isolates and three stages of soybean development. All BPMV isolates inoculated to plants at vegetative stage V1-V3 severely increased seed coat mottling and reduced seed weight than those inoculated at V4-V6 and reproductive stage R1-R3. Seedlings grown from non-mottled seeds germinated more uniformly had fewer thin-stemmed seedlings and grew faster than those grown from mottled seeds. Inoculation of various cultivars and breeding lines showed that there was no correlation between the severity of virus-induced foliar symptoms, relative accumulation of SMV, and extent of seed coat mottling. Thus, by avoiding the presence of BPMV at an early growth stage through proper timing of planting to avoid vectors, proper cultural practices like weed control, use of SMV free seeds, and chemical control, it is possible to greatly improve seed quality and reduce yield losses in soybean.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartChapter3.pdfen_US
dc.relation.haspartChapter1.pdfen_US
dc.relation.haspartChapter2.pdfen_US
dc.relation.haspartChapter4.pdfen_US
dc.relation.haspartVitae.pdfen_US
dc.relation.haspartChapter5.pdfen_US
dc.relation.haspartChapter6.pdfen_US
dc.relation.haspartFrontmatter.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectseed coat mottlingen_US
dc.subjecttime of infectionen_US
dc.subjectyield lossen_US
dc.subjectvirus diversityen_US
dc.subjectsynergismen_US
dc.subjectseed qualityen_US
dc.subjectherbicide resistance-virus interactionsen_US
dc.titleAssessing the Distribution and Impact of Bean pod mottle virus (BPMV) as a Re-emerging Virus, and Soybean mosaic virus (SMV) in Soybean Grown in Virginia.en_US
dc.typeDissertationen_US
dc.contributor.departmentPlant Pathology, Physiology, and Weed Scienceen_US
dc.description.degreePh. D.en_US
thesis.degree.namePh. D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplinePlant Pathology, Physiology, and Weed Scienceen_US
dc.contributor.committeechairTolin, Sue A.en_US
dc.contributor.committeememberAbaye, Azenegashe Ozzieen_US
dc.contributor.committeememberPfeiffer, Douglas G.en_US
dc.contributor.committeememberStromberg, Erik L.en_US
dc.contributor.committeememberWarren, Herman L.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-08312004-143153/en_US
dc.date.sdate2004-08-31en_US
dc.date.rdate2004-09-10
dc.date.adate2004-09-10en_US


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