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Genetic erosion in traditional rice agro-ecosystems in Southern Philippines: drivers and consequences

  • Florence L. Zapico (a1), Josefina T. Dizon (a2), Teresita H. Borromeo (a3), Kenneth L. McNally (a4), Edwino S. Fernando (a5) and Jose E. Hernandez (a3)...


This paper examines genetic erosion in rice landraces thriving in traditional smallholder agricultural systems in the Sarangani uplands, Philippines. In these marginal areas, the crop is closely interwoven with tribal culture and is vital in ensuring food security among upland households. Field visits unveiled high varietal diversity for upland rice and a rich tapestry of indigenous knowledge associated with its cultivation and use. Study results, however, revealed the tapering of the crop's genetic base due to farmers' changing priorities, pest infestation, weakening seed supply systems, shift to cash crops, natural calamities, environmental degradation, government programmes and peace and order problems. Consequently, these pressures undermined traditional agricultural systems in Sarangani upland communities causing food and water scarcity, hunger and suffering on a catastrophic scale. Interdisciplinary strategies aimed at simultaneously averting further varietal losses and environmental degradation while improving human well-being are therefore warranted. Furthermore, making traditional rice farming a lucrative endeavour will induce the younger generation to remain in the uplands and choose farming as a profession. This way, biocultural restoration of agriculture will be attained and the continued presence of the tribal groups in the Sarangani uplands will be ensured for a very long time.


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Aguilar, CH (2018) Assessment of Globally Important Agricultural Heritage Systems (GIAHS) In Kiangan, Ifugao: Implications for Dynamic Conservation and Sustainable Management. Master's Thesis, University of the Philippines-Los Banos, Laguna, The Philippines.
Appa Rao, S, Bounphanousay, C, Schiller, JM, Alcantara, AP and Jackson, MT (2002) Naming traditional rice varieties by farmers in the Lao PDR. Genetic Resources and Crop Evolution 49: 8388.
Arora, R and Dhaliwal, GS (1996) Agro-ecological changes and insect pest problems in Indian agriculture. Indian Journal of Ecology 23: 109122.
Berg, T (1996) Dynamic Management of Plant Genetic Resources: Potentials of Emerging Grassroots Movements. Studies in Plant Genetic Resources, No 1. Rome: Plant Production and Protection Division, FAO.
Brush, SB (1992) Reconsidering the green revolution: diversity and stability in cradle areas of crop domestication. Human Ecology 20: 145167.
Brush, SB (1999) Genetic erosion of crop populations in centers of diversity: a revision. In: Serwinski, J and Faberová, I (eds) Proceedings of the Technical Meeting on the Methodology of the FAO World Information and Early Warning System on Plant Genetic Resources, Prague, Czech Republic. 21–23 June 1999. Rome: FAO, pp. 3444.
Dahl, K and Nabhan, GP (1992) Conservation of Plant Genetic Resources: Grassroots Efforts in North America. Nairobi, Kenya: Acts Press.
Daoas, DA, Dela Cruz, RE, Damaso, EJ, Paredes, NT and Nahangayan, D (1999) Efforts at protecting traditional knowledge: the experience of the Philippines. In: WIPO Roundtable on Intellectual Property and Traditional Knowledge. World Intellectual Property Organization: Geneva, Switzerland, p. 14.
Donald, PF, Sanderson, FJ, Burfield, IJ, Bierman, SM, Gregory, RD and Waliczky, Z (2007) International conservation policy delivers benefits for birds in Europe. Science 317: 810.
Erskine, W and Muehlbauer, FJ (1990) Effects of climatic variations on crop genetic resources and plant breeding aims in West Asia and North Africa. In: Jackson, MT, Ford-Lloyd, BV and Parry, ML (eds) Climatic Change and Plant Genetic Resources. London: Belhaven Press, pp. 148157.
Food and Agriculture Organization (1996) The State of the World's Plant Genetic Resources for Food and Agriculture. Rome, Italy: FAO.
Ford-Lloyd, BV, Brar, D, Khush, GS, Jackson, MT and Virk, PS (2008) Genetic erosion over time of rice landrace agrobiodiversity. Plant Genetic Resources: Characterization and Utilization 7: 163168.
Frankel, OH (1974) Genetic conservation: our evolutionary responsibility. Genetics 78: 5365.
Friis-Hansen, E and Guarino, L (1995) Collection plant genetic resources and documenting associated Indigenous knowledge in the field: a participatory approach. In: Guarino, L, Rao, VR and Reid, R (eds) Collecting Plant Genetic Diversity Technical Guidelines. Wallingford: CAB International, pp. 346–267.
Gao, L (2003) The conservation of Chinese rice biodiversity: genetic erosion, ethnobotany and prospects. Genetic Resources and Crop Evolution 50: 1732.
Green, RE, Balmford, A, Crane, PR, Mace, GM, Reynolds, JD and Turner, RK (2005) A framework for improved monitoring of biodiversity: responses to the world summit on sustainable development. Conservation Biology 19: 5665.
Hammer, K (2004) Resolving the challenge posed by agrobiodiversity and plant genetic resources – an attempt. The Journal Tropics and Subtropics. Beiheft No. 76, Kassel University Press, Kassel, Germany, p. 184.
Hammer, K and Teklu, Y (2008) Plant genetic resources: selected issues from genetic erosion to genetic engineering. The Journal of Agriculture and Rural Development in the Tropics and Subtropics 109: 1550.
Hummer, KE (2015) In the footsteps of Vavilov: plant diversity then and now. HortScience 50: 784788.
Keisha, A, Maxted, N and Ford-Lloyd, B (2008) The assessment of biodiversity loss over time: wild legumes in Syria. Genetic Resources and Crop Evolution 55: 603612.
Kjellqvist, E (1973) Near east – cereals, Turkey, Syria, Iraq, Iran, Pakistan. In: Frankel, OH (ed.) Survey of Crop Genetic Resources in their Centres of Diversity, First Report, Rome, Italy: FAO, pp. 921.
Kumar, GK, Pradeep, S, Sridhara, S and Manjunatha, M (2012) Incidence of sucking pests on promising traditional paddy cultivars in inorganic situation. Plant Archives 12: 2326.
Ling, KC, Aguiero, VM and Lee, SH (1970) A mass screening method for testing resistance to grassy stunt disease of rice. Plant Disease Reporter 56: 565569.
Litsinger, JA, Canapi, BL, Bandong, JP, Lumaban, MD, Raymundo, FD and Barrion, AT (2009) Insect pests of rainfed wetland rice in the Philippines: population densities, yield loss and insecticide management. International Journal of Pest Management 55: 221242.
Long, CL, Li, YH, Wang, JR and Pei, SJ (1995) Crop diversity in Swidden agroecosystems of the Jinuoshan in Xishuangbanna, China. In: Pei, SJ and Sajise, P (eds) Regional Studies on Biodiversity: Concept, Framework, and Methods. Kunming, Taichung, China: Yunnan Science and Technology Press, pp. 151157.
Mathur, PN (2011) Assessing the threat of genetic erosion. In: Guarino, L, Ramanatha Rao, V, Goldberg, E (eds) Collecting Plant Genetic Diversity: Technical Guidelines-2011 Update. New Delhi, India: Bioversity International, CAB International. pp. 17.
Morin, SR, Calibo, M, Garcia-Belen, M, Pham, JL and Palis, F (2002) Natural hazards and genetic diversity in rice. Agriculture and Human Values 19: 133149.
Myers, N (1994) Protected areas – protected from a greater “what?”. Biodiversity and Conservation 3: 411418.
Posey, DA (1996) Provisions and Mechanisms of the Convention on Biological Diversity for Access to Traditional Technologies and Benefit Sharing for Indigenous and Local Communities Embodying Traditional Lifestyles. Oxford Centre for Environment, Ethics & Society, Research Papers 6. Oxford: United Kingdom, p. 731.
Poudel, D, Sthapit, B and Shrestha, P (2015) An analysis of social seed network and its contribution to on-farm conservation of crop genetic diversity in Nepal. International Journal of Biodiversity 2015: 312621.
Shrestha, PK (1998) Gene, gender and generation: role of traditional seed supply system in the maintenance of agrobiodiversity in Nepal. In: Pratap, T and Sthapit, B (eds) Managing Agrobiodiversity: Formers' Changing Perspectives and Institutional Responses in the HKH Region. Kathmandu, Nepal: lClMOD. pp. 206216.
Thrupp, LA (1998) Cultivating Diversity: Agrobiodiversity and Food Security. Washington, DC, USA: World Resources Institute.
Tripp, R and van der Heide, W (1996) The Erosion of Crop Genetic Diversity: Challenges, Strategies and Uncertainties, Natural Resource Perspectives/Number 7, March 1996/Overseas Development Institute, Portland House, Stag Place, London SW1E 5DP, UK.
United Nations Environment Programme (2010). Year in review 2010. The Convention on Biological Diversity- Secretariat of the Convention on Biological Diversity, Montreal, Quebec, Canada, p. 60.
van de Wouw, M, Kik, C, van Hintum, T, van Treuren, R and Visser, B (2009) Genetic erosion in crops: concept, research results and challenges. Plant Genetic Resources Characterization and Utilization 8: 115.
Vaughan, DA and Chang, TT (1992) In situ conservation of rice genetic resources. Economic Botany 46: 368383.
Watson-Jones, SJ, Maxted, N and Ford-Lloyd, BV (2006) Population baseline data for monitoring genetic diversity loss for 2010: a case study for Brassica species in the UK. Biological Conservation 132: 490499.
Wilson, RJ, Thomas, CD, Fox, R, Roy, DB and Kunin, WE (2004) Spatial patterns in species distributions reveal biodiversity change. Nature 432: 393396.
Zapico, FL, Aguilar, CH, Abistano, A, Carino-Turner, J and Jacinto-Reyes, L (2015) Biocultural diversity of Sarangani Province, Philippines: an ethno-ecological analysis. Rice Science 22: 138146.


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Genetic erosion in traditional rice agro-ecosystems in Southern Philippines: drivers and consequences

  • Florence L. Zapico (a1), Josefina T. Dizon (a2), Teresita H. Borromeo (a3), Kenneth L. McNally (a4), Edwino S. Fernando (a5) and Jose E. Hernandez (a3)...


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