African cassava mosaic disease
| dc.creator | Legg, James P. | |
| dc.date | 2008 | |
| dc.date | 2018-04-24T08:40:24Z | |
| dc.date | 2018-04-24T08:40:24Z | |
| dc.date.accessioned | 2026-06-27T15:49:46Z | |
| dc.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. | |
| dc.identifier | https://hdl.handle.net/10568/92276 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/114679 | |
| dc.language | en | |
| dc.publisher | Elsevier | |
| dc.rights | Limited Access | |
| dc.source | Legg, J. (2008). African cassava mosaic disease. In F. Claude, Encyclopedia of virology (3rd ed., p. 30-36). Oxford: Elsevier. | |
| dc.subject | acmv | |
| dc.subject | begomovirus | |
| dc.subject | bemisia | |
| dc.subject | cassava | |
| dc.subject | cmd | |
| dc.subject | control | |
| dc.subject | eacmv | |
| dc.subject | epidemiology | |
| dc.subject | geminivirus | |
| dc.subject | pandemic | |
| dc.subject | resistance | |
| dc.subject | transmission | |
| dc.subject | whitefly | |
| dc.title | African cassava mosaic disease | |
| dc.type | Book Chapter |