Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia
Sweet potato (Ipomoea batatas) varieties have important nutritional differences and there is strong interest to identify nutritionally superior varieties for dissemination. In agricultural household surveys, this information is often collected based on the farmer's self-report. However, recent evide...
| Autores principales: | , , , , , , |
|---|---|
| Formato: | Artículo preliminar |
| Lenguaje: | Inglés |
| Publicado: |
World Bank
2016
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/128919 |
| _version_ | 1855523835038662656 |
|---|---|
| author | Kosmowski, Frederic Aragaw, A. Kilian, Andrzej Ambel, A.A. Ilukor, J. Yigezu, B. Stevenson, James R. |
| author_browse | Ambel, A.A. Aragaw, A. Ilukor, J. Kilian, Andrzej Kosmowski, Frederic Stevenson, James R. Yigezu, B. |
| author_facet | Kosmowski, Frederic Aragaw, A. Kilian, Andrzej Ambel, A.A. Ilukor, J. Yigezu, B. Stevenson, James R. |
| author_sort | Kosmowski, Frederic |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Sweet potato (Ipomoea batatas) varieties have important nutritional differences and there is strong interest to identify nutritionally superior varieties for dissemination. In agricultural household surveys, this information is often collected based on the farmer's self-report. However, recent evidence has demonstrated the inherent difficulties in correctly identifying varieties from self-report information. This study examines the accuracy of self-report information on varietal identification from a data capture experiment on sweet potato varieties in southern Ethiopia. Three household-based methods of identifying varietal adoption are tested against the benchmark of DNA fingerprinting: (A) elicitation from farmers with basic questions for the most widely planted variety; (B) farmer elicitation on five sweet potato phenotypic attributes by showing a visual-aid protocol; and (C) enumerator recording observations on five sweet potato phenotypic attributes using a visual-aid protocol and visiting the field. The reference being the DNA fingerprinting, about 30 percent of improved varieties were identified as local or non-improved, and 20 percent of farmers identified a variety as local when it was in fact improved. The variety names given by farmers delivered inconsistent and fuzzy varietal identities. The visual-aid protocols employed in methods B and C were better than method A, but still way below the adoption estimates given by the DNA fingerprinting method. The findings suggest that estimating the adoption of improved varieties with methods based on farmer self-reports is questionable, and point toward a wider use of DNA fingerprinting, likely to become the gold standard for crop varietal identification.
This work is a part of the SIAC (2013-2016) program to develop robust methods to routinely track adoption of CGIAR research outcomes. You can find a bit more information on the collaboration with LSMS-ISA here (http://impact.cgiar.org/methods/lsms-isa).
This research was supported by ISPC-SPIA under the grant “Strengthening Impact Assessment in the CGIAR (SIAC).” (https://cas.cgiar.org/spia/news/strengthening-impact-assessment-cgiar-siac-2013-2016) |
| format | Artículo preliminar |
| id | CGSpace128919 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | World Bank |
| publisherStr | World Bank |
| record_format | dspace |
| spelling | CGSpace1289192025-10-27T13:12:25Z Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia Kosmowski, Frederic Aragaw, A. Kilian, Andrzej Ambel, A.A. Ilukor, J. Yigezu, B. Stevenson, James R. reports data methods household surveys surveys accuracy farmers gold adoption identification leaves variety dna protocols b dna fingerprinting ipomoea batatas varieties s names ethiopia farmer information ipomoea Sweet potato (Ipomoea batatas) varieties have important nutritional differences and there is strong interest to identify nutritionally superior varieties for dissemination. In agricultural household surveys, this information is often collected based on the farmer's self-report. However, recent evidence has demonstrated the inherent difficulties in correctly identifying varieties from self-report information. This study examines the accuracy of self-report information on varietal identification from a data capture experiment on sweet potato varieties in southern Ethiopia. Three household-based methods of identifying varietal adoption are tested against the benchmark of DNA fingerprinting: (A) elicitation from farmers with basic questions for the most widely planted variety; (B) farmer elicitation on five sweet potato phenotypic attributes by showing a visual-aid protocol; and (C) enumerator recording observations on five sweet potato phenotypic attributes using a visual-aid protocol and visiting the field. The reference being the DNA fingerprinting, about 30 percent of improved varieties were identified as local or non-improved, and 20 percent of farmers identified a variety as local when it was in fact improved. The variety names given by farmers delivered inconsistent and fuzzy varietal identities. The visual-aid protocols employed in methods B and C were better than method A, but still way below the adoption estimates given by the DNA fingerprinting method. The findings suggest that estimating the adoption of improved varieties with methods based on farmer self-reports is questionable, and point toward a wider use of DNA fingerprinting, likely to become the gold standard for crop varietal identification. This work is a part of the SIAC (2013-2016) program to develop robust methods to routinely track adoption of CGIAR research outcomes. You can find a bit more information on the collaboration with LSMS-ISA here (http://impact.cgiar.org/methods/lsms-isa). This research was supported by ISPC-SPIA under the grant “Strengthening Impact Assessment in the CGIAR (SIAC).” (https://cas.cgiar.org/spia/news/strengthening-impact-assessment-cgiar-siac-2013-2016) 2016-09 2023-02-25T17:08:56Z 2023-02-25T17:08:56Z Working Paper https://hdl.handle.net/10568/128919 en Open Access application/pdf World Bank Kosmowski, Frederic; Aragaw, Abiyot; Kilian, Andrzej; Ambel, Alemayehu A.; Ilukor, John; Yigezu, Biratu; Stevenson, James. 2016. Varietal identification in household surveys : results from an experiment using DNA fingerprinting of sweet potato leaves in southern Ethiopia. Policy Research working paper 7812. Washington, D.C. : World Bank |
| spellingShingle | reports data methods household surveys surveys accuracy farmers gold adoption identification leaves variety dna protocols b dna fingerprinting ipomoea batatas varieties s names ethiopia farmer information ipomoea Kosmowski, Frederic Aragaw, A. Kilian, Andrzej Ambel, A.A. Ilukor, J. Yigezu, B. Stevenson, James R. Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title | Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title_full | Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title_fullStr | Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title_full_unstemmed | Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title_short | Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia |
| title_sort | varietal identification in household surveys results from an experiment using dna fingerprinting of sweet potato leaves in southern ethiopia |
| topic | reports data methods household surveys surveys accuracy farmers gold adoption identification leaves variety dna protocols b dna fingerprinting ipomoea batatas varieties s names ethiopia farmer information ipomoea |
| url | https://hdl.handle.net/10568/128919 |
| work_keys_str_mv | AT kosmowskifrederic varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT aragawa varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT kilianandrzej varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT ambelaa varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT ilukorj varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT yigezub varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia AT stevensonjamesr varietalidentificationinhouseholdsurveysresultsfromanexperimentusingdnafingerprintingofsweetpotatoleavesinsouthernethiopia |