Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance
Up to 50% of Brachiaria production in the tropics is affected by foliar blight caused by Rhizoctonia spp. Monothallic isolates of Rhizoctonia (n = 147) were cultured from different Brachiaria genotypes in Colombia and morphologically characterized and evaluated in pathogenicity trials in the greenho...
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| Format: | Journal Article |
| Language: | Inglés |
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Scientific Societies
2013
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| Online Access: | https://hdl.handle.net/10568/33523 |
| _version_ | 1855516710052823040 |
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| author | Álvarez, E. Latorre, M. Bonilla, Ximena P. Miles, John W. Sotelo, G. |
| author_browse | Bonilla, Ximena P. Latorre, M. Miles, John W. Sotelo, G. Álvarez, E. |
| author_facet | Álvarez, E. Latorre, M. Bonilla, Ximena P. Miles, John W. Sotelo, G. |
| author_sort | Álvarez, E. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Up to 50% of Brachiaria production in the tropics is affected by foliar blight caused by Rhizoctonia spp. Monothallic isolates of Rhizoctonia (n = 147) were cultured from different Brachiaria genotypes in Colombia and morphologically characterized and evaluated in pathogenicity trials in the greenhouse. Based on restriction fragment length polymorphism of the internal transcribed spacer region, 101 of the isolates were identified as Rhizoctonia solani anastomosis group (AG)-1 IA and were multinucleated, with high growth rate, brown mycelium, and high virulence; and 46 isolates were identified as Rhizoctonia sp. AG-D and were binucleated, with low growth rate, white mycelium, and lower virulence on the Brachiaria genotypes tested. The Rhizoctonia isolates also showed variation according to geographic origin, with R. solani AG-1 IA prevalent in warm lowland areas and Rhizoctonia sp. AG-D occurring in cooler areas. Ten Brachiaria genotypes were challenged with different Rhizoctonia isolates and resistant reactions were seen in three of these genotypes, including Brachiaria hybrid (International Center for Tropical Agriculture [CIAT] 36062), Brachiaria brizantha ‘Marandú’ (CIAT 6294), and Brachiaria hybrid ‘Mulato II’ (CIAT 36087). These results will contribute to a greater understanding of the interaction of diverse Rhizoctonia isolates on different Brachiaria genotypes, supporting improvement of Brachiaria spp. for disease resistance. |
| format | Journal Article |
| id | CGSpace33523 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | Scientific Societies |
| publisherStr | Scientific Societies |
| record_format | dspace |
| spelling | CGSpace335232025-02-05T06:35:11Z Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance Álvarez, E. Latorre, M. Bonilla, Ximena P. Miles, John W. Sotelo, G. plant diseases feed crops brachiaria genotypes rhizoctonia pathogenicity virulence genetic resistance rflp pcr genotipos patogenicidad virulencia resistencia genética Up to 50% of Brachiaria production in the tropics is affected by foliar blight caused by Rhizoctonia spp. Monothallic isolates of Rhizoctonia (n = 147) were cultured from different Brachiaria genotypes in Colombia and morphologically characterized and evaluated in pathogenicity trials in the greenhouse. Based on restriction fragment length polymorphism of the internal transcribed spacer region, 101 of the isolates were identified as Rhizoctonia solani anastomosis group (AG)-1 IA and were multinucleated, with high growth rate, brown mycelium, and high virulence; and 46 isolates were identified as Rhizoctonia sp. AG-D and were binucleated, with low growth rate, white mycelium, and lower virulence on the Brachiaria genotypes tested. The Rhizoctonia isolates also showed variation according to geographic origin, with R. solani AG-1 IA prevalent in warm lowland areas and Rhizoctonia sp. AG-D occurring in cooler areas. Ten Brachiaria genotypes were challenged with different Rhizoctonia isolates and resistant reactions were seen in three of these genotypes, including Brachiaria hybrid (International Center for Tropical Agriculture [CIAT] 36062), Brachiaria brizantha ‘Marandú’ (CIAT 6294), and Brachiaria hybrid ‘Mulato II’ (CIAT 36087). These results will contribute to a greater understanding of the interaction of diverse Rhizoctonia isolates on different Brachiaria genotypes, supporting improvement of Brachiaria spp. for disease resistance. 2013-06 2013-08-26T14:07:14Z 2013-08-26T14:07:14Z Journal Article https://hdl.handle.net/10568/33523 en Open Access Scientific Societies Alvarez, E., Latorre, M., Bonilla, X., Sotelo, G., & Miles, J. W. (2013). Diversity of Rhizoctonia spp. Causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance. In Plant Disease (Vol. 97, Issue 6, pp. 772–779). Scientific Societies. https://doi.org/10.1094/pdis-04-12-0380-re |
| spellingShingle | plant diseases feed crops brachiaria genotypes rhizoctonia pathogenicity virulence genetic resistance rflp pcr genotipos patogenicidad virulencia resistencia genética Álvarez, E. Latorre, M. Bonilla, Ximena P. Miles, John W. Sotelo, G. Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title | Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title_full | Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title_fullStr | Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title_full_unstemmed | Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title_short | Diversity of Rhizoctonia spp. causing Foliar Blight on Brachiaria in Colombia and Evaluation of Brachiaria Genotypes for Foliar Blight Resistance |
| title_sort | diversity of rhizoctonia spp causing foliar blight on brachiaria in colombia and evaluation of brachiaria genotypes for foliar blight resistance |
| topic | plant diseases feed crops brachiaria genotypes rhizoctonia pathogenicity virulence genetic resistance rflp pcr genotipos patogenicidad virulencia resistencia genética |
| url | https://hdl.handle.net/10568/33523 |
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