A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops
Pathogen buildup in vegetative planting material, termed seed degeneration, is a major problem in many low-income countries. When smallholder farmers use seed produced on-farm or acquired outside certified programs, it is often infected. We introduce a risk assessment framework for seed degeneration...
| Autores principales: | , , , , , , , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Scientific Societies
2017
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/81225 |
| _version_ | 1855539843275161600 |
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| author | Thomas-Sharma, Sara Andrade-Piedra, J.L. Carvajal-Yepes, Mónica Hernández Nopsa, J.F. Jeger, Michael Jones, Roger Kromann, P. Legg, James P. Yuen, Jonathan Forbes, G. Garrett, K.A. |
| author_browse | Andrade-Piedra, J.L. Carvajal-Yepes, Mónica Forbes, G. Garrett, K.A. Hernández Nopsa, J.F. Jeger, Michael Jones, Roger Kromann, P. Legg, James P. Thomas-Sharma, Sara Yuen, Jonathan |
| author_facet | Thomas-Sharma, Sara Andrade-Piedra, J.L. Carvajal-Yepes, Mónica Hernández Nopsa, J.F. Jeger, Michael Jones, Roger Kromann, P. Legg, James P. Yuen, Jonathan Forbes, G. Garrett, K.A. |
| author_sort | Thomas-Sharma, Sara |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Pathogen buildup in vegetative planting material, termed seed degeneration, is a major problem in many low-income countries. When smallholder farmers use seed produced on-farm or acquired outside certified programs, it is often infected. We introduce a risk assessment framework for seed degeneration, evaluating the relative performance of individual and combined components of an integrated seed health strategy. The frequency distribution of management performance outcomes was evaluated for models incorporating biological and environmental heterogeneity, with the following results. (1) On-farm seed selection can perform as well as certified seed, if the rate of success in selecting healthy plants for seed production is high; (2) when choosing among within-season management strategies, external inoculum can determine the relative usefulness of ‘incidence-altering management’ (affecting the proportion of diseased plants/seeds) and ‘rate-altering management’ (affecting the rate of disease transmission in the field); (3) under severe disease scenarios, where it is difficult to implement management components at high levels of effectiveness, combining management components can be synergistic and keep seed degeneration below a threshold; (4) combining management components can also close the yield gap between average and worst-case scenarios. We also illustrate the potential for expert elicitation to provide parameter estimates when empirical data are unavailable.[Formula: see text] Copyright © 2017 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license . |
| format | Journal Article |
| id | CGSpace81225 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Scientific Societies |
| publisherStr | Scientific Societies |
| record_format | dspace |
| spelling | CGSpace812252025-03-13T09:45:30Z A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops Thomas-Sharma, Sara Andrade-Piedra, J.L. Carvajal-Yepes, Mónica Hernández Nopsa, J.F. Jeger, Michael Jones, Roger Kromann, P. Legg, James P. Yuen, Jonathan Forbes, G. Garrett, K.A. bananas cassava root crops potatoes seeds simulation models sweet potatoes vegetative propagation yams banano plantas de raíces comestibles papa semillas modelos de simulación batata propagación vegetativa names Pathogen buildup in vegetative planting material, termed seed degeneration, is a major problem in many low-income countries. When smallholder farmers use seed produced on-farm or acquired outside certified programs, it is often infected. We introduce a risk assessment framework for seed degeneration, evaluating the relative performance of individual and combined components of an integrated seed health strategy. The frequency distribution of management performance outcomes was evaluated for models incorporating biological and environmental heterogeneity, with the following results. (1) On-farm seed selection can perform as well as certified seed, if the rate of success in selecting healthy plants for seed production is high; (2) when choosing among within-season management strategies, external inoculum can determine the relative usefulness of ‘incidence-altering management’ (affecting the proportion of diseased plants/seeds) and ‘rate-altering management’ (affecting the rate of disease transmission in the field); (3) under severe disease scenarios, where it is difficult to implement management components at high levels of effectiveness, combining management components can be synergistic and keep seed degeneration below a threshold; (4) combining management components can also close the yield gap between average and worst-case scenarios. We also illustrate the potential for expert elicitation to provide parameter estimates when empirical data are unavailable.[Formula: see text] Copyright © 2017 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license . 2017-10 2017-05-26T16:25:15Z 2017-05-26T16:25:15Z Journal Article https://hdl.handle.net/10568/81225 en Open Access Scientific Societies Thomas-Sharma, Sara; Andrade-Piedra, Jorge; Carvajal Yepes, Monica; Hernandez Nopsa, John; Jeger, Michael; Jones, Roger; Kromann, Peter; Legg, James; Yuen, Jonathan; Forbes, Gregory; Garrett, Karen A.. 2017. A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops . Phytopathology 107(10): 1123-1135. |
| spellingShingle | bananas cassava root crops potatoes seeds simulation models sweet potatoes vegetative propagation yams banano plantas de raíces comestibles papa semillas modelos de simulación batata propagación vegetativa names Thomas-Sharma, Sara Andrade-Piedra, J.L. Carvajal-Yepes, Mónica Hernández Nopsa, J.F. Jeger, Michael Jones, Roger Kromann, P. Legg, James P. Yuen, Jonathan Forbes, G. Garrett, K.A. A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title | A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title_full | A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title_fullStr | A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title_full_unstemmed | A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title_short | A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops |
| title_sort | risk assessment framework for seed degeneration informing an integrated seed health strategy for vegetatively propagated crops |
| topic | bananas cassava root crops potatoes seeds simulation models sweet potatoes vegetative propagation yams banano plantas de raíces comestibles papa semillas modelos de simulación batata propagación vegetativa names |
| url | https://hdl.handle.net/10568/81225 |
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