Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia
Cassava Witches' Broom Disease (CWBD) is a threat to cassava (Manihot esculenta) in mainland Southeast Asia (SEA). The prevalence of CWBD in the region, which had been low in the previous 5 years, has reached a critical point. CWBD incidence in Lao PDR, Cambodia, Vietnam, and Thailand has been repo...
| Autores principales: | , , , , , , , , , , , |
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| Formato: | Resumen |
| Lenguaje: | Inglés |
| Publicado: |
2023
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| Acceso en línea: | https://hdl.handle.net/10568/138757 |
| _version_ | 1855531567619768320 |
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| author | Arinaitwe, W Vongphachanh, P Chittarath, K HangLe, T Oeurn, S Malik, I Newby, J Sophearith, S Youabee, L Leiva, A Pardo, J Cuellar, W |
| author_browse | Arinaitwe, W Chittarath, K Cuellar, W HangLe, T Leiva, A Malik, I Newby, J Oeurn, S Pardo, J Sophearith, S Vongphachanh, P Youabee, L |
| author_facet | Arinaitwe, W Vongphachanh, P Chittarath, K HangLe, T Oeurn, S Malik, I Newby, J Sophearith, S Youabee, L Leiva, A Pardo, J Cuellar, W |
| author_sort | Arinaitwe, W |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Cassava Witches' Broom Disease (CWBD) is a threat to cassava (Manihot esculenta) in mainland Southeast Asia (SEA). The prevalence of CWBD in the region, which had been low in the previous 5 years, has reached a critical point. CWBD incidence in Lao PDR, Cambodia, Vietnam, and Thailand has been reported at 75% in some cases. CWBD was previously suspected to be caused by a phytoplasma, with limited-to-no detection. There is no biological evidence linking phytoplasma and CWBD. We recently used shotgun sequencing to examine pathogen communities in CWBD-infected and healthy plants. We found that a fungus in the genus Ceratobasidium, 98.3-99.7%, similar to C. theobromae, was conspicuously present in contigs from diseased but not healthy plants. C. theobromae causes vascular streak disease (VSD), one of the major cacao diseases in SEA and challenging
to culture in-vitro. We have developed a robust PCR-based assay based on the latest sequence data to support the multiplication of disease-free planting materials and regional wide surveillance. Currently, we are investigating CWBD diversity, disease progression, host range, and transmission pathways to accelerate the development of integrated management options, including breeding for resistance and biochemical control. |
| format | Abstract |
| id | CGSpace138757 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| record_format | dspace |
| spelling | CGSpace1387572025-11-05T12:09:02Z Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia Arinaitwe, W Vongphachanh, P Chittarath, K HangLe, T Oeurn, S Malik, I Newby, J Sophearith, S Youabee, L Leiva, A Pardo, J Cuellar, W cassava pathogens fungi disease outbreaks Cassava Witches' Broom Disease (CWBD) is a threat to cassava (Manihot esculenta) in mainland Southeast Asia (SEA). The prevalence of CWBD in the region, which had been low in the previous 5 years, has reached a critical point. CWBD incidence in Lao PDR, Cambodia, Vietnam, and Thailand has been reported at 75% in some cases. CWBD was previously suspected to be caused by a phytoplasma, with limited-to-no detection. There is no biological evidence linking phytoplasma and CWBD. We recently used shotgun sequencing to examine pathogen communities in CWBD-infected and healthy plants. We found that a fungus in the genus Ceratobasidium, 98.3-99.7%, similar to C. theobromae, was conspicuously present in contigs from diseased but not healthy plants. C. theobromae causes vascular streak disease (VSD), one of the major cacao diseases in SEA and challenging to culture in-vitro. We have developed a robust PCR-based assay based on the latest sequence data to support the multiplication of disease-free planting materials and regional wide surveillance. Currently, we are investigating CWBD diversity, disease progression, host range, and transmission pathways to accelerate the development of integrated management options, including breeding for resistance and biochemical control. 2023-08-31 2024-02-01T09:44:32Z 2024-02-01T09:44:32Z Abstract Presentation https://hdl.handle.net/10568/138757 en Open Access application/pdf application/pdf Arinaitwe, W.; Vongphachanh, P.; Chittarath, K.; HangLe, T.; Oeurn, S.; Malik, I.; Newby, J.; Sophearith, S.; Youabee, L.; Leiva, A.; Pardo, J.; Cuellar, W. (2023) Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia. 15 sl. |
| spellingShingle | cassava pathogens fungi disease outbreaks Arinaitwe, W Vongphachanh, P Chittarath, K HangLe, T Oeurn, S Malik, I Newby, J Sophearith, S Youabee, L Leiva, A Pardo, J Cuellar, W Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title | Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title_full | Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title_fullStr | Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title_full_unstemmed | Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title_short | Witches' broom disease of cassava is associated with a fastidious fungal pathogen in Southeast Asia |
| title_sort | witches broom disease of cassava is associated with a fastidious fungal pathogen in southeast asia |
| topic | cassava pathogens fungi disease outbreaks |
| url | https://hdl.handle.net/10568/138757 |
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