Journal Article

Wheat Rusts and the Costs of Genetic Diversity in the Punjab of Pakistan

Paul W. Heisey, Melinda Smale, Derek Byerlee and Edward Souza

in American Journal of Agricultural Economics

Published on behalf of Agricultural and Applied Economics Association

Volume 79, issue 3, pages 726-737
Published in print August 1997 | ISSN: 0002-9092
Published online August 1997 | e-ISSN: 1467-8276 | DOI: http://dx.doi.org/10.2307/1244415
Wheat Rusts and the Costs of Genetic Diversity in the Punjab of Pakistan

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The theory of impure public goods is used to demonstrate why farmers may not grow wheat cultivars with the socially desirable level of rust resistance. First, they may grow cultivars that are high yielding though susceptible to rust. Second, many farmers may grow cultivars with a similar genetic basis of resistance. Expected rust losses can be reduced by (a) more diversified genetic background in released wheat cultivars; (b) greater spatial diversity in planted cultivars; or (c) use of a temporally changing list of cultivars known to be rust resistant. Yield trade-offs associated with these policies illustrate potential costs of increasing genetic diversity.

Keywords: genetic diversity; impure public goods; Pakistan; rust (disease); wheat; O130; Q120; Q160

Journal Article.  0 words. 

Subjects: Agricultural Economics ; Economic Development

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