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Using Ecological Indices and Economics to Explain Diversity in a Wheat Crop: Examples from Australia and China

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Listed:
  • Smale, Melinda
  • Meng, Erika C.H.
  • Brennan, John P.
  • Hu, Ruifa

Abstract

Spatial diversity indicators may serve policymakers as they seek to manage crop genetic diversity and externalities associated with diffusion of some genetically modified crops. This paper adapts ecological indices of spatial diversity to area distributions of modern wheat varieties in contrasting production systems of Australia and China. The variation in three concepts of spatial diversity—richness, abundance, and evenness—is explained using Zellner’s seemingly unrelated regression (SUR). Determinants of wheat diversity differ by concept, but include variety traits other than yield potential, environmental factors, and policies affecting the supply of varieties, research spill-ins, and market liberalization.

Suggested Citation

  • Smale, Melinda & Meng, Erika C.H. & Brennan, John P. & Hu, Ruifa, 2000. "Using Ecological Indices and Economics to Explain Diversity in a Wheat Crop: Examples from Australia and China," 2000 Conference (44th), January 23-25, 2000, Sydney, Australia 123732, Australian Agricultural and Resource Economics Society.
    • Handle: RePEc:ags:aare00:123732
    DOI: 10.22004/ag.econ.123732
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    References listed on IDEAS

    as
    1. Andrew P. Barkley & Lori L. Porter, 1996. "The Determinants of Wheat Variety Selection in Kansas, 1974 to 1993," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 78(1), pages 202-211.
    2. Brennan, John P. & Murray, Gordon M. & Ballantyne, Barbara, 1992. "Private and Social Costs of Growing Cultivars Susceptible to Diseases," 1992 Conference (36th), February 10-13, 1992, Canberra, Australia 146426, Australian Agricultural and Resource Economics Society.
    3. Smale, Melinda & Bellon, Mauricio R. & Gomez, Jose Alfonso Aguirre, 1999. "The Private and Public Characteristics of Maize Land Races and the Area Allocation Decisions of Farmers in a Center of Crop Diversity," Economics Working Papers 7669, CIMMYT: International Maize and Wheat Improvement Center.
    4. Gomez, Jose Alfonso Aguirre & Bellon, Mauricio R. & Smale, Melinda, 1998. "A Regional Analysis of Maize Biological Diversity in Southeastern Guanajuato, Mexico," Economics Working Papers 7671, CIMMYT: International Maize and Wheat Improvement Center.
    5. Melinda Smale & Jason Hartell & Paul W. Heisey & Ben Senauer, 1998. "The Contribution of Genetic Resources and Diversity to Wheat Production in the Punjab of Pakistan," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 80(3), pages 482-493.
    6. Brennan, John P. & Godden, David P. & Smale, Melinda & Meng, Erika C.H., 1999. "Variety Choice by Australian Wheat Growers and Implications for Genetic Diversity," 1999 Conference (43th), January 20-22, 1999, Christchurch, New Zealand 123785, Australian Agricultural and Resource Economics Society.
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