First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh
Wheat blast or ‘brusone,’ caused by the ascomycetous fungus Magnaporthe oryzae B.C. Couch (syn. Pyricularia oryzae Cavara), was first identified in 1985 in Brazil. M. oryzae is composed of a range of morphologically identical but genetically different host-specific pathotypes that are specialized fo...
| Autores: | , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | México |
| Institución: | Centro Internacional de Mejoramiento de Maíz y Trigo |
| Repositorio: | Repositorio Institucional de Publicaciones Multimedia del CIMMYT |
| OAI Identifier: | oai:repository.cimmyt.org:10883/19713 |
| Acceso en línea: | https://hdl.handle.net/10883/19713 |
| Access Level: | acceso abierto |
| Palabra clave: | AGRICULTURAL SCIENCES AND BIOTECHNOLOGY WHEAT BLASTS (OF PLANTS) MAGNAPORTHE PHYTOSANITARY MEASURES |
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First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| title |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| spellingShingle |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh Malaker, P.K. AGRICULTURAL SCIENCES AND BIOTECHNOLOGY WHEAT BLASTS (OF PLANTS) MAGNAPORTHE PHYTOSANITARY MEASURES |
| title_short |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| title_full |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| title_fullStr |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| title_full_unstemmed |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| title_sort |
First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in Bangladesh |
| dc.creator.none.fl_str_mv |
Malaker, P.K. Barma, N.C.D. Tiwari, T.P. Collis, W.J. Duveiller, E. Singh, K. Joshi, A.K. Singh, R.P. Braun, H.J. Peterson, G.L. Pedley, K.F. Farman, M. Valent, B. |
| author |
Malaker, P.K. |
| author_facet |
Malaker, P.K. Barma, N.C.D. Tiwari, T.P. Collis, W.J. Duveiller, E. Singh, K. Joshi, A.K. Singh, R.P. Braun, H.J. Peterson, G.L. Pedley, K.F. Farman, M. Valent, B. |
| author_role |
author |
| author2 |
Barma, N.C.D. Tiwari, T.P. Collis, W.J. Duveiller, E. Singh, K. Joshi, A.K. Singh, R.P. Braun, H.J. Peterson, G.L. Pedley, K.F. Farman, M. Valent, B. |
| author2_role |
author author author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY WHEAT BLASTS (OF PLANTS) MAGNAPORTHE PHYTOSANITARY MEASURES |
| topic |
AGRICULTURAL SCIENCES AND BIOTECHNOLOGY WHEAT BLASTS (OF PLANTS) MAGNAPORTHE PHYTOSANITARY MEASURES |
| description |
Wheat blast or ‘brusone,’ caused by the ascomycetous fungus Magnaporthe oryzae B.C. Couch (syn. Pyricularia oryzae Cavara), was first identified in 1985 in Brazil. M. oryzae is composed of a range of morphologically identical but genetically different host-specific pathotypes that are specialized for infecting rice (Oryza pathotype), wheat (Triticum pathotype - MoT), perennial and annual ryegrass (Lolium pathotype), foxtail millet (Setaria pathotype), and many other graminaceous hosts. Isolates from different hosts are genetically distinct, although cross infection occurs to some extent. Wheat blast has become a serious biotic constraint to wheat (Triticum aestivum L.) production in parts of the warmer wheat growing areas of the Southern Cone region of South America, causing yield losses of 10 to 100% in recent years (Duveiller et al. 2016). Wheat blast was observed for the first time outside of South America during the 2015-16 cropping season in the districts of Kushtia, Meherpur, Chuadanga, Jhenaidah, Jessore, Barisal, Bhola, and several other districts in the south of Bangladesh. Infected plants showed the typical wheat blast symptoms with the spike becoming partially or completely bleached with the blackening of the rachis in a short span of time. Examination of diseased plants showed the presence of elliptical, grayish to tan necrotic lesions with dark borders on the leaf often mixed with spot blotch disease lesions. Additionally, in some fields, blackening of lower nodes was observed. Grains from blast-infected heads were small, shriveled, deformed, and had low test-weight leading to serious yield losses. Diseased plants were collected and brought to the Wheat Research Centre, Bangladesh Agricultural Research Institute, Dinajpur, for further investigation. Grayish mycelium of the fungus taken from the infection point on the rachis of several independent spikes was observed. Incubation of several infected spikes/leaves in a 3-layered moist blotter at room temperature less than 12 h light/darkness cycle for 5 days led to the production of pyriform conidia. Morphobiometrical characteristics of the typical pyriform (pear-shaped) and 2-septate hyaline conidia were in agreement with the identification of the fungus as M. oryzae (Subramanian 1968). The air-dried spike samples have been kept in cold storage and several infected spikes were sent to the USDA-ARS, FDWSRU laboratory in the United States for characterization of the pathogen. There, the presence of M. oryzae in the infected samples was confirmed based on morphobiometrical analysis, and strains were preserved in the FDWSRU permanent wheat blast strain collection. Molecular analysis with MoT-specific markers and comparative genome analysis of isolates (BdBar16-1, GenBank accession no. LXON01000000; BdJes16-1, LXOO01000000; BdMeh16-1, LXOP01000000) confirmed that the wheat blast observed in Bangladesh is caused by MoT pathotype and has strong genetic identity to a strain from South America (B71, LXOQ01000000). This first incidence of wheat blast was significantly widespread accounting for approximately 15% of Bangladesh’s total wheat area. This large scale incidence of wheat blast has underscored a concern about the potential spread of wheat blast to other wheat producing areas in Bangladesh, South Asia, and beyond. |
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2016 |
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2016 2019-01-09T20:27:58Z 2019-01-09T20:27:58Z |
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info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
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article |
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0031-949X 1943-7684 https://hdl.handle.net/10883/19713 10.1094/PDIS-05-16-0666-PDN |
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0031-949X 1943-7684 10.1094/PDIS-05-16-0666-PDN |
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https://hdl.handle.net/10883/19713 |
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English |
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English |
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Open Access info:eu-repo/semantics/openAccess |
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Open Access |
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openAccess |
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PDF application/pdf |
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South America, Brazil, Bangladesh, Kushtia, Meherpur, Chuadanga, Jhenaiah, Jessore, Barisal, Bhola United States |
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American Phytopathological Society (APS) |
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American Phytopathological Society (APS) |
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11 100 Plant Disease reponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYT instname:Centro Internacional de Mejoramiento de Maíz y Trigo instacron:CIMMYT |
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Centro Internacional de Mejoramiento de Maíz y Trigo |
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CIMMYT |
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CIMMYT |
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Repositorio Institucional de Publicaciones Multimedia del CIMMYT |
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Repositorio Institucional de Publicaciones Multimedia del CIMMYT |
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First Report of Wheat Blast Caused by Magnaporthe oryzae Pathotype triticum in BangladeshMalaker, P.K.Barma, N.C.D.Tiwari, T.P.Collis, W.J.Duveiller, E.Singh, K.Joshi, A.K.Singh, R.P.Braun, H.J.Peterson, G.L.Pedley, K.F.Farman, M.Valent, B.AGRICULTURAL SCIENCES AND BIOTECHNOLOGYWHEATBLASTS (OF PLANTS)MAGNAPORTHEPHYTOSANITARY MEASURESWheat blast or ‘brusone,’ caused by the ascomycetous fungus Magnaporthe oryzae B.C. Couch (syn. Pyricularia oryzae Cavara), was first identified in 1985 in Brazil. M. oryzae is composed of a range of morphologically identical but genetically different host-specific pathotypes that are specialized for infecting rice (Oryza pathotype), wheat (Triticum pathotype - MoT), perennial and annual ryegrass (Lolium pathotype), foxtail millet (Setaria pathotype), and many other graminaceous hosts. Isolates from different hosts are genetically distinct, although cross infection occurs to some extent. Wheat blast has become a serious biotic constraint to wheat (Triticum aestivum L.) production in parts of the warmer wheat growing areas of the Southern Cone region of South America, causing yield losses of 10 to 100% in recent years (Duveiller et al. 2016). Wheat blast was observed for the first time outside of South America during the 2015-16 cropping season in the districts of Kushtia, Meherpur, Chuadanga, Jhenaidah, Jessore, Barisal, Bhola, and several other districts in the south of Bangladesh. Infected plants showed the typical wheat blast symptoms with the spike becoming partially or completely bleached with the blackening of the rachis in a short span of time. Examination of diseased plants showed the presence of elliptical, grayish to tan necrotic lesions with dark borders on the leaf often mixed with spot blotch disease lesions. Additionally, in some fields, blackening of lower nodes was observed. Grains from blast-infected heads were small, shriveled, deformed, and had low test-weight leading to serious yield losses. Diseased plants were collected and brought to the Wheat Research Centre, Bangladesh Agricultural Research Institute, Dinajpur, for further investigation. Grayish mycelium of the fungus taken from the infection point on the rachis of several independent spikes was observed. Incubation of several infected spikes/leaves in a 3-layered moist blotter at room temperature less than 12 h light/darkness cycle for 5 days led to the production of pyriform conidia. Morphobiometrical characteristics of the typical pyriform (pear-shaped) and 2-septate hyaline conidia were in agreement with the identification of the fungus as M. oryzae (Subramanian 1968). The air-dried spike samples have been kept in cold storage and several infected spikes were sent to the USDA-ARS, FDWSRU laboratory in the United States for characterization of the pathogen. There, the presence of M. oryzae in the infected samples was confirmed based on morphobiometrical analysis, and strains were preserved in the FDWSRU permanent wheat blast strain collection. Molecular analysis with MoT-specific markers and comparative genome analysis of isolates (BdBar16-1, GenBank accession no. LXON01000000; BdJes16-1, LXOO01000000; BdMeh16-1, LXOP01000000) confirmed that the wheat blast observed in Bangladesh is caused by MoT pathotype and has strong genetic identity to a strain from South America (B71, LXOQ01000000). This first incidence of wheat blast was significantly widespread accounting for approximately 15% of Bangladesh’s total wheat area. This large scale incidence of wheat blast has underscored a concern about the potential spread of wheat blast to other wheat producing areas in Bangladesh, South Asia, and beyond.2330American Phytopathological Society (APS)2019-01-09T20:27:58Z2019-01-09T20:27:58Z2016info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlePDFapplication/pdf0031-949X1943-7684https://hdl.handle.net/10883/1971310.1094/PDIS-05-16-0666-PDN11100Plant Diseasereponame:Repositorio Institucional de Publicaciones Multimedia del CIMMYTinstname:Centro Internacional de Mejoramiento de Maíz y Trigoinstacron:CIMMYTEnglishSouth America, Brazil, Bangladesh, Kushtia, Meherpur, Chuadanga, Jhenaiah, Jessore, Barisal, BholaUnited StatesCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.Open Accessinfo:eu-repo/semantics/openAccessoai:repository.cimmyt.org:10883/197132024-10-11T19:55:35Z |
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15,812429 |