How Accurate are Adoption Rates? Testing a Protocol for Pigeon pea in northern Tanzania. Socioeconomics Discussion Paper Series 30.

Milne, S and Ganga Rao, N P V R and Orr, A (2015) How Accurate are Adoption Rates? Testing a Protocol for Pigeon pea in northern Tanzania. Socioeconomics Discussion Paper Series 30. [Socioeconomics Discussion Paper Series]

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Abstract

High rates of outcrossing make it difficult to obtain accurate adoption rates of improved varieties for often cross-pollinated crops. We developed and tested a protocol for identification of improved varieties of pigeonpea in northern Tanzania. The study was conducted in the 2012 season, in collaboration with the Selian Agricultural Research Institute (SARI) and covered 34 villages in 6 districts, for 704 cases. Each sample of pigeonpea plant was identified twice, once by the farmer and once by the enumerator using the protocol. A sub-sample of 51 plants was photographed in the field for later identification by experts. For improved varieties, the convergence between the farmers’ identification and the protocol was 74 percent. For local varieties, the convergence was 65 percent. For mixed varieties, the convergence was only 33 percent. We also compared the identification of improved varieties using the protocol with visual identification by pigeonpea experts using the photographs of the 51 sampled plants. The convergence between the experts’ identification and the revised protocol ranged from 41 to 71 percent. A simulation exercise based on a revised protocol significantly increased this convergence, but it remained below 90 percent. Hence, accurate identification of improved varieties of pigeonpea is more complex than previously thought. Protocols based on phenotypic traits are a potential solution to the problem of identifying improved varieties in self-pollinated crops, but more reliable protocols are needed to improve the accuracy of adoption rates for improved pigeonpea varieties in Tanzania.

Item Type: Socioeconomics Discussion Paper Series
Divisions: RP-Market Institutions and Policies
CRPS: CGIAR Research Program on Policies, Institutions, and Markets
Series Name: Socioeconomics Discussion Paper Series 30
Uncontrolled Keywords: Pigeonpea, varietal identification, adoption
Subjects: Mandate crops > Pigeonpea
Depositing User: Mr Ramesh K
Date Deposited: 13 Mar 2015 08:44
Last Modified: 23 Apr 2015 08:19
URI: http://oar.icrisat.org/id/eprint/8586
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