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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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Title Varietal identification in household surveys: results from three household-based methods against the benchmark of DNA fingerprinting in southern Ethiopia.
 
Creator Kosmowski, F.
Aragaw, A.
Kilian, A.
Ambel, A.
Ilukor, J.
Yigezu, B.
Stevenson, J.
 
Subject sweet potatoes
dna fingerprinting
households
surveys
varieties
identification
 
Description 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.
 
Date 2019-06
2018-02-22T16:00:53Z
2018-02-22T16:00:53Z
 
Type Journal Article
 
Identifier Kosmowski, F.; Aragaw, A.; Kilian, A.; Ambel, A.; Ilukor, J.; Yigezu, B.; Stevenson, J. 2019. Varietal identification in household surveys: results from three household-based methods against the benchmark of DNA fingerprinting in southern Ethiopia. Experimental Agriculture. ISSN 0014-4797. v55(3) pp. 371-385
0014-4797
https://hdl.handle.net/10568/91173
https://doi.org/10.1017/S0014479718000030
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 371-385
 
Publisher Cambridge University Press (CUP)
 
Source Experimental Agriculture