Abstract
The signing of the Convention on Biological Diversity at the ``Earth Summit'' in 1992, its ratification and its subsequent entering into force have highlighted the need for an approach to biodiversity conservation that employs both ex situ and in situ techniques in a complementary manner. Though much research has focused on ex situ techniques, less progress has been made in developing methodologies for the conservation of genetic diversity in situ. The definition of in situ conservation used in the Convention on Biological Diversity encompasses two distinct processes: conservation of wild species in genetic reserves and of crops on-farm. Of these two, the latter, where the genetic diversity of crop land races is conserved within traditional farming systems, has been the less studied and remains less well understood. While there are still relatively few practical examples of on-farm genetic resources conservation, most genetic diversity of immediate and potential use to plant breeders is found among land races, and there is evidence that it is being rapidly eroded. This paper attempts to set on-farm conservation within the context of plant genetic resource conservation as a whole, to introduces a possible generalised model for the conservation of genetic diversity on-farm and to promote debate around the science of on-farm conservation.
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References
Almekinders C. and de Boef W.,2000, Encouraging Diversity: The Conservation and Development of Plant Genetic Resources, Intermediate Technology Development Group, London, pp. 1–362.
Altieri M.A. and Merrick L.C.,1987. In situ conservation of crop genetic resources through maintenance of traditional farming systems. Econ. Bot. 41: 86–96.
Atlin G., Berg T. and Almekinders C., 2000.Synthesis: towards integrated plant breeding. In: Almekinders, C. &W. de Boef (eds), Encouraging Diversity: The Conservation And Development of Plant Genetic Resources, Intermediate Technology Development Group, London. pp. 213–217.
Bellon M.R., 1991. The ethnoecology of maize variety management: A case study from Mexico. Human Ecology 19, 389–418.
Bellon M.R., 1996. The dynamics of crop infraspecific diversity: A conceptual framework at the farmer level. Econ. Bot. 50 (1): 29–36.
Bellon M.R., J.L. Pham & M.T. Jackson, 1997. Genetic conservation: a role for farmers. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London. pp. 263–289.
Boster J.S., 1984. Selection for perceptual distinctiveness: Evidence from Aguaruna cultivars of Manihot esculenta (Euphorbiaceae). Econ. Bot. 39 (3): 310–325.
Brush S.B., 1991. A farmer based-approach to conserving crop germplasm. Econ. Bot. 45, 153–165.
Brush S.B., 1995. In situ conservation of land races in centers of crop diversity. Crop Sci. 35, 346–354.
Brush S.B., 1999. Genes in the Field: On-Farm Conservation of Crop Diversity. Lewis Publishers, Boca Raton, Florida, USA.
Brush S.B., Carney H.J. and Huaman Z., 1981. Dynamics of Andean potato agriculture. Econ. Bot. 35, 70–88.
Brush S.B., Kressell R., Ortega R., Gisneros P., Zimmerer K. and Quiros C., 1995. Potato diversity in the Andean centre of crop domestication. Conserv. Biol. 9, 1189–1198.
Brush S.B. and Meng E. 1998. Farmers' valuation and conservation of crop genetic resources. Genet. Resourc. Crop Evol. 45: 139–150.
Campilan D., 1998. Dynamics of household food security in rural Philippines. Paper presented at the FAO Technical Consultation on Rural Household Food Security, Bangkok, Thailand, 15–19th September 1998.
Ceccarelli S., Guando S. and Booth R.H. 1996. International breeding programmes and resource-poor farmers: crop improvement in difficult environments. In: Eyzaguirre, P. & M. Iwanaga (eds), Participatory Plant Breeding, IPGRI, Rome, Italy. pp. 99–116.
Chiwona E.A. 2000. On-farm conservation study of associated farmers' varieties in Malawi. Department of Agricultural Research and Technical Services, Lilongwe, Malawi.
Cromwell E. 1990. Seed diffusion mechanisms in small farmer communities: Lessons from Asia, Africa and Latin America. Network Paper 21, Agricultural Administration (Research and Extension) Network, Overseas Development Institute, London.
Crucible II Group, 2000. Policy for genetic resources (people, plants and patents revisited). Seeding solutions. Volume 1. International Plant Genetic Resources Institute, Rome and Dag Hammarskjöld Foundation, Uppsala.
DeWalt K.M. and DeWalt B.R., 1992. Agrarian reform and the food crisis in Mexico: Microlevel and macrolevel processes. In: Poggie, J.J., B.R. DeWalt & W.W. Dressler (eds), Anthropological Research: Process and Application, State University of New York Press, Albany, NY, USA. pp. 159–184.
Eyzaguirre P. and Iwanaga M., 1996a. Farmers' contribution to maintaining genetic diversity in crops, and its role within total genetic resource systems. In: Eyzaguirre, P. & M. Iwanaga (eds), Participatory Plant Breeding, IPGRI, Rome, Italy. pp. 9–18.
Eyzaguirre, P. and M. Iwanaga, 1996b. Participatory Plant Breeding. IPGRI, Rome, Italy.
Feldstein, H. and J. Jiggins, 1993. Tools for the Field. Kumarian Press, West Hartford.
FAO, 1998. The State of the World's Plant Genetic Resources for Food and Agriculture. FAO, Rome.
Ford-Lloyd, B.V. and N. Maxted, 1997. Genetic conservation information management. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London. pp. 176–191.
Fowler, C., G.C. Hawtin and T. Hodgkin, 1999. Forward. In: Brush, S.B. (ed.), Genes in the Field: On-Farm Conservation of Crop Diversity. Lewis Publishers, Boca Raton, Florida, USA.
Guarino L. and Friis-Hansen E. 1995. Collecting plant genetic resources and documenting associated indigenous knowledge in the field: a participatory approach. In: Guarino, L., V. Ramanatha Rao & R. Reid (eds), Collecting Plant Genetic Diversity: Technical Guidelines, CAB International, Wallingford. pp. 345–365.
Hawkes J.G. 1991. International workshop on dynamic in situ conservation of wild relatives of major cultivated plants: summary of final discussion and recommendations. Israel J. Bot. 40: 529–536.
Hawkes J.G., Maxted N. and Ford-Lloyd B.V., 2000. The Ex Situ Conservation of Plant Genetic Resources. Kluwer, Dordrecht.
Ingram, G.B. and J.T. Williams, 1984. In situ conservation of wild relatives of crops. In: Holden J.H.W. & J.T. Williams (eds), Crop Genetic Resources: Conservation and Evaluation, George Allen & Unwin, London. pp. 163–179.
Jarvis D. and Hodgkin T. 1998. Strengthening the scientific basis of in situ conservation of agricultural biodiversity on-farm. Options for data collection and analysis. Proceedings of a workshop to develop tools and procedures for in situ conservation on-farm, 25–29 August 1997. IPGRI, Rome, Italy.
Jarvis D., Sthapit B. and Sears L., 2000. Conserving agricultural biodiversity in situ: a scientific basis for sustainable agriculture. Proceedings of a workshop, 5–12 July 1999 Pokhara, Nepal. IPGRI, Rome, Italy.
Kashyap R.K. and Duhan J.C., 1994. Health status of farmers' saved wheat seed in Harayana, India – A case study. Seed Sci. Technol. 22: 619–628.
Laliberté B., Maggioni L., Maxted N. and Negri V., 2000. Report of a joint meeting of a Task Force on Wild Species Conservation in Genetic Reserves and a Task Force on On-farm Conservation and Management. 18–20 May 2000, Isola Polvese, Italy. IPGRI, Rome.
Lando R.P. and Mak S., 1994a. Rainfed lowland rice in Cambodia: A baseline study. IRRI Research Paper Series, 152.
Lando R.P. and Mak S., 1994b. Deepwater rice in Cambodia: A baseline survey. IRRI Research Paper Series, 153.
Lando R.P. and Mak S. 1994c. Cambodian farmers decision making in the choice of traditional rainfed lowland rice varieties. IRRI Research Paper Series, 154.
Lawrence M.J. and Marshall D.F., 1997. Plant population genetics. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 99–110.
Louette D. and Smale M., 1996. Genetic diversity and maize seed management in a traditional Mexican community: Implications for in situ conservation of maize. NRC Paper 96–03. CIMMYT, Mexico.
Machado A.T.2000,The collaborative development of stresstolerant maize varieties in Rio de Janeiro, Brazil. In: Almekinders, C. & W. de Boef (eds), Encouraging diversity: The Conservation and Development of Plant Genetic Resources, Intermediate Technology Development Group, London, pp. 199–202.
Maxted N., van Slageren M.W. and Rihan J., 1995. Ecogeographic surveys. In: Guarino, L., V. Ramanatha Rao & R. Reid (eds), Collecting Plant Genetic Diversity: Technical Guidelines, CAB International, Wallingford, pp. 255–286.
Maxted N., Ford-Lloyd B.V. and Hawkes J.G., 1997a. Complementary conservation strategies. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 15–40.
Maxted N., Hawkes J.G., Ford-Lloyd B.V. and Williams J.T., 1997b. A practical model for in situ genetic conservation. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 339-367.
Maxted N., Hawkes J.G., Guarino L. and Sawkins M., 1997c. The selection of taxa for plant genetic conservation. Genet. Resourc. Crop Evol. 7: 337–348.
Maxted N., Guarino L. and Dulloo M.E., 1997d. Management and monitoring. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 144–159.
McNeely J.A. 1988. Economics and biological diversity; developing and using economic incentives to conserve biological resources. International Union for Conservation of Nature and Natural Resources, Gland.
Oldfield M.L. and Alcorn J.B., 1987. Conservation of traditional agroecosystems. Bioscience 37: 199–208.
Pham J.L., Ghesquière A. and Second G., 1994. On-farm conservation of rice genetic resources based on the management of populations made with land races. In: Discussion Workshop on on-farm Conservation of Crop Genetic Resources. IRRI, Los Baños, Philippines, 24–26 March 1994.
Prain G. and Hagmann J., 2000. Synthesis: farmers management of diversity in local systems. In: Almekinders, C. & W. de Boef (eds), Encouraging Diversity: The Conservation and Development of Plant Genetic Resources, Intermediate Technology Development Group, London, pp. 94–100.
Qualset C.O., Damania A.B., Zanatta A.C.A. and Brush S.B., 1997. Locally based crop plant conservation. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 160-175.
Quiros C.F., Ortega R., van Raamsdonk L., Herrera-Montoya M., Cisneros P., Schmidt E. and Brush S.B., 1992. Increase of potato genetic resources in their center of diversity: the role of natural outcrossing and selection by the Andean farmer. Genet. Resourc. Crop Evol. 39: 107–113.
Raven P.H. and McNeely J.A., 1998. Biological extinction: its scope and meaning for us. In: Lakshman, D.G. & J.A. McNeely (eds), Protection of Global Biodiversity: Converging Strategies, Duke University Press, Durham, pp. 376–390.
Sperling L. and Loevinsohn M.E., 1992. The dynamics of adoption: Distribution and mortality of bean varieties among small farmers in Rwanda. Agricultural Systems 41: 441–453.
Sperling L., Loevinsohn M.E. and Ntabomvura B., 1992. Rethinking the farmer s role in plant breeding: Local bean experts and on-station selection in Rwanda. Exper. Agric. 29: 509–519.
United Nations Conference on Environment & Development, 1992. Biodiversity Convention. UNCED, Geneva.
Witcombe J.R., Joshi A., Joshi K.D. and Sthapit B.R., 1996. Farmer participatory crop improvement. I: varietal selection and breeding methods and their impact on biodiversity. Exper. Agric. 32: 445–460.
Worede M. 1992. Ethiopia: a gene bank working with farmers. In: Cooper, D., R. Vellvé & H. Hobbelink (eds), Growing diversity: genetic resources and local food security, Intermediate Technology Publications, London, pp. 78–94.
Worede M. 1993. The role of Ethiopian farmers on the conservation and utilization of crop genetic resources. International Crop Science Society of America 1: 395–399.
Worede M. 1997. Ethiopian in situ conservation. In: Maxted, N., B.V. Ford-Lloyd & J.G. Hawkes (eds), Plant Genetic Conservation: The In Situ Approach, Chapman & Hall, London, pp. 290–301.
Worede M. and Hailu M., 1993. Linking genetic resources conservation to farmers in Ethiopia. In: de Boef, D. (ed.), Cultivating Knowledge: Genetic Diversity Farmer Experimentation and Crop Research, Intermediate Technology Publications, London, pp. 78–84.
Wortmann C.S., Kirby R.A., Eledu C.A. and Allen D.J., 1998. Atlas of Common Bean (Phaseolus vulgaris L.) Production in Africa. CIAT, Cali, Columbia.
Zeven A.C. 1996. Results of activities to maintain landraces and other material in some European countries in situ before 1945 and what we may learn from them. Genet. Resourc. Crop Evol. 43: 337–341.
Zeven A.C. 1999. The traditional inexplicable replacement of seed and seed wares of landraces and cultivars: a review. Euphytica 110: 181–191.
Zimmerer K.S. and Couches D.S., 1991. Geographical approaches to native crop research and conservation: the partitioning of allelic diversity in Andean potatoes. Econ. Bot. 45: 176–189.
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Maxted, N., Guarino, L., Myer, L. et al. Towards a methodology for on-farm conservation of plant genetic resources. Genetic Resources and Crop Evolution 49, 31–46 (2002). https://doi.org/10.1023/A:1013896401710
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DOI: https://doi.org/10.1023/A:1013896401710