Rice hoja blanca: a complex plant-virus-vector pathosystem
Rice hoja blanca (RHB; white leaf) devastated rice ( Oryza sativa ) plantings in tropical America for half a century, before scientists could either identify its causal agent or understand the nature of its cyclical epidemics. The association of the planthopper Tagosodes orizicolus with RHB outbreak...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | Inglés |
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CAB International
2010
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/44059 |
| _version_ | 1855534457387220992 |
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| author | Morales, Francisco José Jennings, Peter R. |
| author_browse | Jennings, Peter R. Morales, Francisco José |
| author_facet | Morales, Francisco José Jennings, Peter R. |
| author_sort | Morales, Francisco José |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Rice hoja blanca (RHB; white leaf) devastated rice ( Oryza sativa ) plantings in tropical America for half a century, before scientists could either identify its causal agent or understand the nature of its cyclical epidemics. The association of the planthopper Tagosodes orizicolus with RHB outbreaks, 20 years after its emergence in South America, suggested the existence of a viral pathogen. However, T. orizicolus could also cause severe direct feeding damage (hopperburn) to rice in the absence of hoja blanca, and breeders promptly realized that the genetic basis of resistance to these problems was different. Furthermore, it was observed that the causal agent of RHB could only be transmitted by a relatively low proportion of the individuals in any given population of T. orizicolus and that the pathogen was transovarially transmitted to the progeny of the planthopper vectors, affecting their normal biology. An international rice germplasm screening effort was initiated in the late 1950s to identify sources of resistance against RHB and the direct feeding damage caused by T. orizicolus , making better progress in the development of hopperburn-resistant than for hoja-blanca-resistant rice lines. In the 1980s, the identification of a novel virus as the causal agent of RHB, and genetic studies on the interaction of this virus with its planthopper vector, confirmed previous studies on the pathogenic nature of the virus to T. orizicolus and helped explain the cyclical nature of RHB epidemics. This disease is best controlled by hybridization of susceptible indica and resistant japonica rice genotypes and the adoption of integrated disease control practices. |
| format | Journal Article |
| id | CGSpace44059 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2010 |
| publishDateRange | 2010 |
| publishDateSort | 2010 |
| publisher | CAB International |
| publisherStr | CAB International |
| record_format | dspace |
| spelling | CGSpace440592025-11-12T05:57:53Z Rice hoja blanca: a complex plant-virus-vector pathosystem Morales, Francisco José Jennings, Peter R. oryza sativa rice tagosodes orizicolus vectors viruses arroz vectores virus Rice hoja blanca (RHB; white leaf) devastated rice ( Oryza sativa ) plantings in tropical America for half a century, before scientists could either identify its causal agent or understand the nature of its cyclical epidemics. The association of the planthopper Tagosodes orizicolus with RHB outbreaks, 20 years after its emergence in South America, suggested the existence of a viral pathogen. However, T. orizicolus could also cause severe direct feeding damage (hopperburn) to rice in the absence of hoja blanca, and breeders promptly realized that the genetic basis of resistance to these problems was different. Furthermore, it was observed that the causal agent of RHB could only be transmitted by a relatively low proportion of the individuals in any given population of T. orizicolus and that the pathogen was transovarially transmitted to the progeny of the planthopper vectors, affecting their normal biology. An international rice germplasm screening effort was initiated in the late 1950s to identify sources of resistance against RHB and the direct feeding damage caused by T. orizicolus , making better progress in the development of hopperburn-resistant than for hoja-blanca-resistant rice lines. In the 1980s, the identification of a novel virus as the causal agent of RHB, and genetic studies on the interaction of this virus with its planthopper vector, confirmed previous studies on the pathogenic nature of the virus to T. orizicolus and helped explain the cyclical nature of RHB epidemics. This disease is best controlled by hybridization of susceptible indica and resistant japonica rice genotypes and the adoption of integrated disease control practices. 2010-01 2014-10-02T08:33:10Z 2014-10-02T08:33:10Z Journal Article https://hdl.handle.net/10568/44059 en Open Access application/pdf CAB International |
| spellingShingle | oryza sativa rice tagosodes orizicolus vectors viruses arroz vectores virus Morales, Francisco José Jennings, Peter R. Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title | Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title_full | Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title_fullStr | Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title_full_unstemmed | Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title_short | Rice hoja blanca: a complex plant-virus-vector pathosystem |
| title_sort | rice hoja blanca a complex plant virus vector pathosystem |
| topic | oryza sativa rice tagosodes orizicolus vectors viruses arroz vectores virus |
| url | https://hdl.handle.net/10568/44059 |
| work_keys_str_mv | AT moralesfranciscojose ricehojablancaacomplexplantvirusvectorpathosystem AT jenningspeterr ricehojablancaacomplexplantvirusvectorpathosystem |