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ADOPTION OF RICE VARIETIES – I. AGE OF VARIETIES AND PATTERNS OF VARIABILITY

Published online by Cambridge University Press:  21 September 2016

J. R. WITCOMBE ,
K. KHADKA ,
R. R. PURI ,
N. P. KHANAL ,
A. SAPKOTA  and
K. D. JOSHI
J. R. WITCOMBE*
Affiliation:
CAZS Natural Resources, Bangor University, Gwynedd LL57 2UW, UK
K. KHADKA
Affiliation:
Local Initiatives for Biodiversity, Research and Development (LI-BIRD), Pokhara, Nepal
R. R. PURI
Affiliation:
Local Initiatives for Biodiversity, Research and Development (LI-BIRD), Pokhara, Nepal
N. P. KHANAL
Affiliation:
Forum for Rural Welfare and Agricultural Reform for Development (FORWARD), Nepal
A. SAPKOTA
Affiliation:
Forum for Rural Welfare and Agricultural Reform for Development (FORWARD), Nepal
K. D. JOSHI
Affiliation:
CAZS Natural Resources, Bangor University c/o CIMMYT South Asia Regional Office, P. O. Box 5186, Kathmandu, Nepal
*
§§Corresponding author. E-mail: j.r.witcombe@bangor.ac.uk
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Summary

Farmers who continue to grow old and obsolete varieties do not gain the benefits they could get from growing newer ones. Given the potential large scale of these foregone benefits, relatively few studies have examined the age of varieties that farmers grow. In three surveys, members of over 3300 households were interviewed to find the rice varieties they grew in 2008 and 2011 in 18 districts in the Terai, the low-altitude region of Nepal. This provided the first description of detailed geographical patterns of adoption of rice varieties and their ages that were repeated over time. There were large differences between district and individual varieties that showed specific geographical patterns of adoption. Such detailed knowledge on spatial diversity of varieties is invaluable for planning extension activities and developing breeding programmes, and cheaper ways than household surveys of collecting this information are discussed. Some of the factors considered important in determining this complex pattern of adoption were seed availability, growing environments that differed from east to west and the continued popularity of varieties once they had established markets. Rice diversity was low because a small number of rice varieties occupied large areas. In 2011, nine varieties covered at least 75% of the total rice area in western districts, just four in central districts and eight in eastern districts. Of these, most were released before 1995 resulting in a high average age of the predominant varieties – they always had an average age of over 20 years no matter which region or year was considered. Even though there were some large changes in varietal composition from 2008 to 2011, the average age of the predominant varieties remained almost the same. In a second paper in this series, we examine how these very low varietal replacement rates, that reduce yields and increase risk to farmers, can be accelerated using a participatory research for development approach called Informal Research and Development (IRD) (Joshi et al., 2012).

Type
Research Article
Information
Experimental Agriculture , Volume 53 , Issue 4 , October 2017 , pp. 512 - 527
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Copyright
Copyright © Cambridge University Press 2016 

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Footnotes

1

Current address: School of Environment, Natural Resources and Geography (SENRGY), Bangor University, Gwynedd LL57 2UW, UK.

2

Current address: National Wheat Research Programme, Nepal Agricultural Research Council, Nepal.

3

Current address: CIMMYT South Asia Regional Office, P. O. Box 5186, Kathmandu, Nepal.

4

Current address: CIMMYT Pakistan, CSI Complex, NARC Park Road 44000, Islamabad, Pakistan.

References

REFERENCES

Bagachi, B. D., Bardhan Roy, S. K., Jaim, W. M. H. and Hossain, M. (2012). Diversity, spatial distribution, and the process of adoption of improved rice varieties in West Bengal. In Adoption and Diffusion of Modern Rice Varieties in Bangladesh and Eastern India, 15–30 (Eds Hossain, M., Jaim, W. M. H., Paris, T. R. and Hardy, B.). Los Baños, Philippines: International Rice Research Institute.Google Scholar
Brennan, J. P. (1984). Measuring the contribution of new varieties to increase wheat yields. Review of Marketing and Agricultural Economics 52:175–95.Google Scholar
Brennan, J. P. and Morris, M. L. (2001). Economic issues in assessing the role of physiology in wheat breeding programs. In Application of Physiology in Wheat Breeding, 78–86 (Eds Reynolds, M. P., Ortiz-Monasterio, J. I. and McNab, A.). Mexico, D.F.: International Maize and Wheat Improvement Center (CIMMYT).Google Scholar
Byerlee, D. and Heisey, P. W. (1990). Wheat varietal diversification over time and space as factors in yield gains and rust resistance in the Punjab. In Accelerating the Transfer of Wheat Breeding Gains to Farmers: A Study of the Dynamics of Varietal Replacement in Pakistan, CIMMYT Research Report 1, 5–24 (Ed Heisey, P. W.). Mexico, D.F.: International Maize and Wheat Improvement Center.Google Scholar
Gauchan, D. and Pandey, S. (2012). Synthesis of key results and implications. In Patterns of Adoption of Improved Rice Varieties and Farm-level Impacts in Stress-Prone Rainfed Areas in South Asia, 1–18 (Eds Pandey, S., Gauchan, D., Malabayabas, M., Bool-Emerick, M. and Hardy, B.). Los Baños, Philippines: International Rice Research Institute.Google Scholar
Hossain, M., Bose, M. L. and Mustafi, B. A. A. (2006). Adoption of productivity impact of modern rice varieties in Bangladesh. The Developing Economies XLIV–2:149–166.Google Scholar
Hossain, M. and Jaim, W. M. H. (2012). Diversity, spatial distribution, and the process of adoption of improved rice varieties in Bangladesh. In Adoption and Diffusion of Modern Rice Varieties in Bangladesh and Eastern India, 15–30 (Eds Hossain, M., Jaim, W. M. H., Paris, T. R. and Hardy, B.). Los Baños, Philippines: International Rice Research Institute.Google Scholar
Joshi, K. D., Biggs, S., Gauchan, D., Devkota, K. P., Devkota, C. K., Shrestha, P. K. and Sthapit, B. R. (2005). Institutional innovations in the Nepal rice improvement system. Aspects of Applied Biology 75:93–97 Google Scholar
Joshi, K. D., Devkota, K. P., Harris, D., Khanal, N. P., Paudyal, B., Sapkota, A. and Witcombe, J. R. (2012). Participatory research approaches rapidly improve household food security in Nepal and identify policy changes required for institutionalisation. Field Crops Research 131:40–48.Google Scholar
Joshi, K. D., Khanal, N. P., Harris, D., Khanal, N. N., Sapkota, A., Khadka, K., Derai, R., Neupane, R. K., Joshi, M. and Witcombe, J. R. (2014). Regulatory reforms of seed systems: benefits and impacts from a mungbean case study in Nepal. Field Crops Research 158:15–23.Google Scholar
Joshi, K. D. and Sthapit, B. R. (1990). Informal Research and Development (IRD): a new approach to research and extension. LARC Discussion Paper 1990/4. Pokhara, Nepal: Lumle Agriculture Research Centre.Google Scholar
Joshi, K. D., Subedi, M., Rana, R. B., Kadyat, K. B. and Sthapit, B. R. (1997). Enhancing on-farm varietal diversity through participatory varietal selection: a case study for Chaite rice in Nepal. Experimental Agriculture 33:335–334.Google Scholar
Krishna, V. V., Spielman, D. J. and Veettil, P. C. (2016). Exploring the supply and demand factors of varietal turnover in Indian wheat. The Journal of Agricultural Science 154:258–272.Google Scholar
NARC (2014). Released and registered crop varieties in Nepal (1960–2013) . NARC Publication No. 0040-2013/14. Communication, Publication and Documentation Division. Khumaltar, Lalitpur, Nepal: Nepal Agricultural Research Council, pp. 33.Google Scholar
Pandey, S. and Rajatasereekul, S. (1999). Economics of plant breeding: the value of shorter breeding cycles in North east Thailand. Field Crops Research 64:187–197.Google Scholar
Pandey, S., Velasco, Ma. L. and Yamano, T. (2015). Scientific strength in rice improvement programmes, varietal outputs and adoption of improved varieties in South Asia. In Crop Improvement, Adoption, and Impacts of Improved Varieties in Food Crops in Sub Saharan Africa, 239–264 (Eds Walker, T. S. and Alwang, J.). Wallingford UK: CGIAR and CABI.CrossRefGoogle Scholar
Rana, R. B., Joshi, K. D., Gyawali, S. and Witcombe, , , J. R. (2004). Participatory crop improvement project in Chitwan and Nawalparasi Districts of Nepal. Baseline Report CAZS and LI-BIRD Discussion Papers No. 5. ISSN: 1363–8123. CAZS, University of Wales.Google Scholar
Rawal, K. B., Ojha, P. R., Bhatta, V. R., Joshi, G. R. and Singh, U. (2008). Adoption and spread of rice varieties in Sarlahi and Kailali districts identified by participatory varietal selection (PVS) and bred by client-oriented breeding (COB). A survey report. Kanchanpur, Nepal: SUPPORT Foundation. pp. 34.Google Scholar
Tripp, R. (1997). New Seed and Old Laws-Regulatory Reform and the Diversification of National Seed Systems. London: Intermediate Technology Publications on behalf of the Overseas Development Institute.Google Scholar
Tripp, R., Louwaars, N., Joost van der Berg, W., Virk, D. S. and Witcombe, J. R. (1997). Alternatives for seed regulatory reform: an analysis of variety testing, variety regulation and seed quality control. Network Paper No. 69. ODI Agricultural Research and Extension Network. AgREN. London: Overseas Development Institute 1–25.Google Scholar
Walker, T. S. (2015). Relevant concepts and hypothesis in assessing the performance of food crop improvement in Sub-Saharan Africa. In Crop Improvement, Adoption, and Impacts of Improved Varieties in Food Crops in Sub Saharan Africa, 24–34 (Eds Walker, T. S. and Alwang, J.). Wallingford, UK: CGIAR and CABI.CrossRefGoogle Scholar
Walker, T. S., Alwang, J., Alene, A., Ndjuenga, J., Labarta, R., Yizgezu, Y., Diangne, A., Andrade, R., Murthoni Andriatsitona, R., De Groote, H., Mauch, K., Yirga, C., Simotowe, F., Katungi, E., Jogo, W., Jaleta, M., Pandey, S. and Charyulu Kumara, D. (2015). Varietal adoption, outcomes and impact. In Crop Improvement, Adoption, and Impacts of Improved Varieties in Food Crops in Sub Saharan Africa, 388–405 (Eds Walker, T. S. and Alwang, J.). Wallingford, UK: CGIAR and CABI.Google Scholar
Witcombe, J. R., Devkota, K. P. and Joshi, K. D. (2010). Linking community-based seed producers to markets for a sustainable seed supply system. Experimental Agriculture 46:425–437.Google Scholar
Witcombe, J. R., Gyawali, S., Subedi, M., Virk, D. S. and Joshi, K. D. (2013). Plant breeding can be made more efficient by having fewer, better crosses. BMC Plant Biology 13:22.Google Scholar
Witcombe, J. R., Joshi, K. D., Rana, R. B. and Virk, D. S. (2001). Increasing genetic diversity by participatory varietal selection in high potential production systems in Nepal and India. Euphytica 122:575–588.Google Scholar
Witcombe, J. R., Packwood, A. G. B. and Virk, D. S. (1998). The extent and rate of adoption of modern cultivars in India. In Seeds of Choice: Making Most of the New Varieties for Small Farmers, 53–68 (Eds Witcombe, J. R., Virk, D. S. and Farrington, J.). New Delhi: Oxford and IBH Publishing Co. and London: Intermediate Technology Group.Google Scholar
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