African cassava mosaic disease
Cassava mosaic disease (CMD), recognized in Africa for more than a century, is now known to be caused by a group of geminiviruses in the genus Begomovirus from the family Geminiviridae. All are transmitted in a persistent manner by the whitefly vector, Bemisia tabaci. Structurally, cassava mosaic ge...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
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Elsevier
2008
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| Acceso en línea: | https://hdl.handle.net/10568/92276 |
| _version_ | 1855513421519257600 |
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| author | Legg, James P. |
| author_browse | Legg, James P. |
| author_facet | Legg, James P. |
| author_sort | Legg, James P. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Cassava mosaic disease (CMD), recognized in Africa for more than a century, is now known to be caused by a group of geminiviruses in the genus Begomovirus from the family Geminiviridae. All are transmitted in a persistent manner by the whitefly vector, Bemisia tabaci. Structurally, cassava mosaic geminiviruses (CMGs) are comprised of two small, single-stranded, circular DNA molecules, DNA-A and DNA-B, each of which is encapsidated within a geminate coat. CMG infection results in symptoms comprising misshapen leaves with a mosaic-like chlorosis and general plant stunting, leading to reduced tuberous root production. Through the processes of virus-virus synergism, pseudo-recombination and true recombination, CMGs have evolved into a diverse and highly successful group of plant pathogens and seven species are currently recognized from Africa. Rapid spread of a recombinant strain, East African cassava mosaic virus-Uganda (EACMV-UG), has been associated with a pandemic of unusually severe CMD, which has affected much of East and Central Africa, leading to production losses of 47%, equivalent to nearly 14 million tonnes. Although the deployment of conventionally-bred host plant resistance is the main approach being used to manage CMGs, with considerable success, increased attention is being given to the development of transgenic resistance strategies. |
| format | Book Chapter |
| id | CGSpace92276 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2008 |
| publishDateRange | 2008 |
| publishDateSort | 2008 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace922762023-10-02T08:09:29Z African cassava mosaic disease Legg, James P. acmv begomovirus bemisia cassava cmd control eacmv epidemiology geminivirus pandemic resistance transmission whitefly Cassava mosaic disease (CMD), recognized in Africa for more than a century, is now known to be caused by a group of geminiviruses in the genus Begomovirus from the family Geminiviridae. All are transmitted in a persistent manner by the whitefly vector, Bemisia tabaci. Structurally, cassava mosaic geminiviruses (CMGs) are comprised of two small, single-stranded, circular DNA molecules, DNA-A and DNA-B, each of which is encapsidated within a geminate coat. CMG infection results in symptoms comprising misshapen leaves with a mosaic-like chlorosis and general plant stunting, leading to reduced tuberous root production. Through the processes of virus-virus synergism, pseudo-recombination and true recombination, CMGs have evolved into a diverse and highly successful group of plant pathogens and seven species are currently recognized from Africa. Rapid spread of a recombinant strain, East African cassava mosaic virus-Uganda (EACMV-UG), has been associated with a pandemic of unusually severe CMD, which has affected much of East and Central Africa, leading to production losses of 47%, equivalent to nearly 14 million tonnes. Although the deployment of conventionally-bred host plant resistance is the main approach being used to manage CMGs, with considerable success, increased attention is being given to the development of transgenic resistance strategies. 2008 2018-04-24T08:40:24Z 2018-04-24T08:40:24Z Book Chapter https://hdl.handle.net/10568/92276 en Limited Access Elsevier Legg, J. (2008). African cassava mosaic disease. In F. Claude, Encyclopedia of virology (3rd ed., p. 30-36). Oxford: Elsevier. |
| spellingShingle | acmv begomovirus bemisia cassava cmd control eacmv epidemiology geminivirus pandemic resistance transmission whitefly Legg, James P. African cassava mosaic disease |
| title | African cassava mosaic disease |
| title_full | African cassava mosaic disease |
| title_fullStr | African cassava mosaic disease |
| title_full_unstemmed | African cassava mosaic disease |
| title_short | African cassava mosaic disease |
| title_sort | african cassava mosaic disease |
| topic | acmv begomovirus bemisia cassava cmd control eacmv epidemiology geminivirus pandemic resistance transmission whitefly |
| url | https://hdl.handle.net/10568/92276 |
| work_keys_str_mv | AT leggjamesp africancassavamosaicdisease |