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Adoption and economic impact of improved wheat varieties in the developing world

Published online by Cambridge University Press:  05 October 2006

J. DIXON ,
L. NALLEY ,
P. KOSINA ,
R. LA ROVERE ,
J. HELLIN  and
P. AQUINO
J. DIXON
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), Impact Targeting and Assessment Unit, Int. Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
L. NALLEY
Affiliation:
Kansas State University, Department of Agricultural Economics, Manhattan, KS, USA
P. KOSINA
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), Impact Targeting and Assessment Unit, Int. Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
R. LA ROVERE
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), Impact Targeting and Assessment Unit, Int. Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
J. HELLIN
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), Impact Targeting and Assessment Unit, Int. Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
P. AQUINO
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), Impact Targeting and Assessment Unit, Int. Apdo. Postal 6-641, 06600 Mexico, D.F., Mexico
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Abstract

During the past century wheat breeders have produced a large number of genetically improved wheat lines and varieties. This activity has led to widespread adoption of improved varieties, a steady increase in average wheat yields during the past 4–5 decades and major contributions to food security and poverty reduction. The rate of generation and adoption of improved varieties, and therefore the time lag from varietal release to widespread use, varies across regions. The remarkable success of wheat improvement hinges on the decisions of millions of farmers to adopt, or replace older wheat varieties with superior material. The present paper summarizes studies on the determinants of adoption. Because adoption is a necessary but not sufficient condition for economic impact, the present paper synthesizes key assessments of impact from different farming systems in developing countries.

Type
Centenary Review
Information
The Journal of Agricultural Science , Volume 144 , Issue 6 , December 2006 , pp. 489 - 502
Copyright
2006 Cambridge University Press

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