Varietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopia

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cg.coverage.countryEthiopia
cg.coverage.iso3166-alpha2ET
cg.coverage.regionAfrica
cg.coverage.regionSub-Saharan Africa
cg.coverage.regionEastern Africa
cg.identifier.urlhttps://iaes.cgiar.org/node/11548/en
cg.identifier.urlhttps://hdl.handle.net/10986/25057en
cg.placeWashington, D.C.en
cg.subject.systemSouthern Ethiopiaen
cg.subject.systemImproved varietiesen
cg.subject.systemHousehold Surveysen
cg.subject.systemDNA Fingerprintingen
cg.subject.systemPhenotypic attributesen
cg.subject.systemSweet Potatoen
cg.subject.systemLeavesen
cg.subject.systemGenotypingen
cg.subject.systemData collectionen
dc.contributor.authorKosmowski, Fredericen
dc.contributor.authorAragaw, A.en
dc.contributor.authorKilian, Andrzejen
dc.contributor.authorAmbel, A.A.en
dc.contributor.authorIlukor, J.en
dc.contributor.authorYigezu, B.en
dc.contributor.authorStevenson, James R.en
dc.date.accessioned2023-02-25T17:08:56Zen
dc.date.available2023-02-25T17:08:56Zen
dc.identifier.urihttps://hdl.handle.net/10568/128919
dc.titleVarietal Identification in Household Surveys: Results from an Experiment Using DNA Fingerprinting of Sweet Potato Leaves in Southern Ethiopiaen
dcterms.abstractSweet 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)en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationKosmowski, 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 Banken
dcterms.issued2016-09
dcterms.languageen
dcterms.licenseCC-BY-3.0
dcterms.publisherWorld Banken
dcterms.subjectreportsen
dcterms.subjectdataen
dcterms.subjectmethodsen
dcterms.subjecthousehold surveysen
dcterms.subjectsurveysen
dcterms.subjectaccuracyen
dcterms.subjectfarmersen
dcterms.subjectgolden
dcterms.subjectadoptionen
dcterms.subjectidentificationen
dcterms.subjectleavesen
dcterms.subjectvarietyen
dcterms.subjectdnaen
dcterms.subjectprotocolsen
dcterms.subjectben
dcterms.subjectdna fingerprintingen
dcterms.subjectipomoea batatasen
dcterms.subjectvarietiesen
dcterms.subjectsen
dcterms.subjectnamesen
dcterms.subjectethiopiaen
dcterms.subjectfarmeren
dcterms.subjectinformationen
dcterms.subjectipomoeaen
dcterms.typeWorking Paper

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