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CABI Book Chapter

Valuing crop biodiversity: on-farm genetic resources and economic change.

Book cover for Valuing crop biodiversity: on-farm genetic resources and economic change.

Description

In agricultural systems, diversity of crops and varieties is essential to combat the risks farmers face from pests, diseases and variations in climate. Crop biodiversity also underpins the range of dietary needs and services that consumers demand. There is growing concern, however, about declining diversity of crop genetic resources on farms, associated with social and economic change. This book c...

Metrics

Chapter 10 (Page no: 162)

Managing rice biodiversity on farms: the choices of farmers and breeders in Nepal.

Farmers’ choices, given the constraints they face, determine whether or not genetic resources of value to society for future crop improvement continue to be grown on farms. Plant breeders also influence crop biodiversity on farms through the supply of new genetic materials they develop. Using a conceptual approach that is similar to those presented in Part III, this chapter investigates determinants of farmers’ choices and relates them to conservation goals and geneticists’ preferences for landraces in Nepal, a centre of rice diversity. Factors explaining rice diversity measured at the level of the household farm include adult labour available for farm production, the ratio of expected subsistence needs to production, distance from the market and the heterogeneity of farm physical conditions. Those that enhance the richness or evenness of varieties are not always the same as those that increase the probability farmers will grow landraces that breeders consider to be of potential value for crop improvement. Isolation from markets is a major factor regardless of conservation goals. Growing rare landraces is associated with the involvement of women in farm production and landrace sales. Location in the hillside area is perhaps the single most important determinant for least cost conservation. Targeting households for landrace conservation may involve equity considerations since households in the hillsides who are most likely to continue to grow landraces with public value are better off in land, labour and household assets.

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Chapter: 9 (Page no: 146) Rural development and the diversity of potatoes on farms in Cajamarca, Peru. Author(s): Winters, P. Hintze, L. H. Ortiz, O.
Chapter: 11 (Page no: 177) Determinants of cereal diversity in villages of northern Ethiopia. Author(s): Gebremedhin, B. Smale, M. Pender, J.
Chapter: 12 (Page no: 192) Social institutions and seed systems: the diversity of fruits and nuts in Uzbekistan. Author(s): Dusen, M. E. van Dennis, E. Ilyasov, J. Lee, M. Treshkin, S. Smale, M.
Chapter: 13 (Page no: 211) Community seed systems and the biodiversity of millet crops in southern India. Author(s): Nagarajan, L. Smale, M.
Chapter: 14 (Page no: 233) Seed supply and the on-farm demand for diversity: a case study from eastern Ethiopia. Author(s): Lipper, L. Cavatassi, R. Winters, P.
Chapter: 15 (Page no: 251) Institutions, stakeholders and the management of crop biodiversity on Hungarian family farms. Author(s): Bela, G. Balázs, B. Pataki, G.
Chapter: 16 (Page no: 270) Cooperatives, wheat diversity and the crop productivity in southern Italy. Author(s): Falco, S. di Perrings, C.
Chapter: 17 (Page no: 280) Scope, limitations and future directions. Author(s): Smale, M. Lipper, L. Koundouri, P.
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Chapter details

  • Author Affiliation
  • Nepal Agricultural Research Council (NARC), PO Box 5459, Kathmandu, Nepal.
  • Year of Publication
  • 2005
  • ISBN
  • 9780851990835
  • Record Number
  • 20063061422