Journal article
Molecular Genetic Characterization ofSweet potato virus G(SPVG) Isolates from Areas of the Pacific Ocean and Southern Africa
Plant Disease, Vol.92(9), pp.1313-1320
2008
Abstract
Sweet potato virus G (SPVG, genus Potyvirus, family Potyviridae) was detected in sweetpotato (Ipomoea batatas) storage roots sold in the local markets and storage roots or cuttings sampled directly from farmers' fields. Using serological and molecular methods, the virus was detected for the first time in Java, New Zealand, Hawaii, Tahiti, Tubuai, Easter Island, Zimbabwe, and South Africa, and also in an imported storage root under post-entry quarantine conditions in Western Australia. In some specimens, SPVG was detected in mixed infection with Sweet potato feathery mottle virus (genus Potyvirus). The coat protein (CP) encoding sequences of SPVG were analyzed for 11 plants from each of the aforementioned locations and compared with the CP sequences of 12 previously characterized isolates from China, Egypt, Ethiopia, Spain, Peru, and the continental United States. The nucleotide sequence identities of all SPVG isolates ranged from 79 to 100%, and amino acid identities ranged from 89 to 100%. Isolates of the same strain of SPVG had nucleotide and amino acid sequence identities from 97 to 100% and 96 to 100%, respectively, and were found in sweetpotatoes from all countries sampled except Peru. Furthermore, a plant from Zimbabwe was co-infected with two clearly different SPVG isolates of this strain. In contrast, three previously characterized isolates from China and Peru were phylogenetically distinct and exhibited <90% nucleotide identity with any other isolate. So far, the highest genetic diversity of SPVG seems to occur among isolates in China. Distribution of SPVG within many sweetpotato growing areas of the world emphasizes the need to determine the economic importance of SPVG.
Details
- Title
- Molecular Genetic Characterization ofSweet potato virus G(SPVG) Isolates from Areas of the Pacific Ocean and Southern Africa
- Authors/Creators
- M. Rännäli (Author/Creator) - University of HelsinkiV. Czekaj (Author/Creator) - University of HelsinkiR.A.C. Jones (Author/Creator) - Agricultural Research Western Australia, Locked Bag No. 4, Bentley Delivery Centre, Perth, WA 6983, and WA State Agricultural Biotechnology Centre, Murdoch University, Perth, WA 6150, AustraliaJ.D. Fletcher (Author/Creator) - New Zealand Institute for Crop and Food ResearchR.I. Davis (Author/Creator) - Australian Quarantine and Inspection ServiceL. Mu (Author/Creator) - Service du Dévelopement Rural, Département de la Protection des Végétaux, BP 100, Papeete, French Polynesia.G.I. Dwyer (Author/Creator) - Government of Western AustraliaB.A. Coutts (Author/Creator) - Government of Western AustraliaJ.P.T. Valkonen (Author/Creator) - University of Helsinki
- Publication Details
- Plant Disease, Vol.92(9), pp.1313-1320
- Publisher
- The American Phytopathological Society
- Identifiers
- 991005543711807891
- Copyright
- © 2008 The American Phytopathological Society.
- Murdoch Affiliation
- State Agricultural Biotechnology Centre
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.267 Virology - Plant
- 3.267.356 Plant Virus Interactions
- Web Of Science research areas
- Plant Sciences
- ESI research areas
- Plant & Animal Science