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Varietal identification in household surveys: Results from three household-based methods against the benchmark of DNA fingerprinting in Southern Ethiopia

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  • Additional Information
    • Publisher Information:
      Cambridge University Press 2019
    • Abstract:
      PR
      IFPRI3; DCA
      EPTD
      Accurate crop varietal identification is the backbone of any high-quality assessment of outcomes and impacts. Sweetpotato (Ipomoea batatas) varieties have important nutritional differences, and there is a strong interest to identify nutritionally superior varieties for dissemination. In agricultural household surveys, such information is often collected based on the farmer's self-report. In this article, we present the results of a data capture experiment on sweet potato varietal identification 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. In total, 20% of farmers identified a variety as improved when in fact it was local and 19% identified a variety as local when it was in fact improved. The variety names given by farmers delivered inconsistent and inaccurate varietal identities. Visual-aid protocols employed in methods B and C were better than those in method A, but greatly underestimated the adoption estimates given by the DNA fingerprinting method. Our results suggest that estimating the adoption of improved varieties with methods based on farmer self-reports is questionable and point towards a wider use of DNA fingerprinting in adoption and impact assessments.
    • Subject Terms:
      varieties; households; DNA fingerprinting; sweet potatoes; nutrition; households; farmers; quality; genetic variation; diversification; Journal article; Journal article; Journal Article
    • Availability:
      Open access content. Open access content
      Product of CGIAR Standing Panel on Impact Assessment, Food and Agriculture Organization of the United Nations; See also: https://doi.org/10.1596/1813-9450-7812
    • Note:
      English
      English
    • Other Numbers:
      DFP oai:cdm15738.contentdm.oclc.org:p15738coll5/7008
      10.1017/S0014479718000030
      1132415873
    • Contributing Source:
      INTERNATIONAL FOOD POLICY RES INST LIBR
      From OAIster®, provided by the OCLC Cooperative.
    • Accession Number:
      edsoai.on1132415873
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