Client-orientated breeding is quick, cheap and effective |
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Concept and approaches of client-oriented breeding (COB): Better varieties from better plant breeding |
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'Client-Oriented Breeding' is a pioneering approach that puts the customer - the farmer - first. Farmers set the goals. They say what qualities they want in new varieties. Next, they select those that work best under local conditions from a large batch of possible varieties, and then test them in their fields using their own farming practices. It's a quick, cheap and effective approach. This system helps develop improved varieties very quickly. Farmers in India, Bangladesh, Nepal and Ghana already use maize, rice, chickpea and cassava varieties developed this way. So, putting farmers first could have a rapid impact in areas where conventional plant breeding has failed to produce the choice of varieties farmers need. Project Ref: PSP34:
Research Programmes: Plant Sciences Research Programme (PSP). Joint PSP with the Crop Protection Programme. DFID India. Relevant Research Projects: R6636, R7080, R7122, R75565, R7838, R8071, R8099
The list above includes only those who were partners in the listed research projects. In addition there are many other collaborators involved in the scaling up of varieties bred by COB that are too numerous to list here.
Outputs proposed: The PSP has developed and formalised a participatory research approach to the breeding of new varieties with farmers called client-oriented breeding (COB) that overcomes the limitations of traditional, on-station plant breeding. COB was also known as participatory plant breeding (PPB) but recently we revised the name to reflect the purpose of farmer participation (improved client orientation) rather than simply describe the activity (farmer participation) (Witcombe et al., 2005). COB involves stakeholders in setting breeding goals i.e., specifying the traits required in the new varieties. Parents of crosses are carefully chosen to meet the specified needs. The breeding method uses many fewer crosses than is conventionally the case and large population sizes are grown (Witcombe and Virk, 2001). Selection inn the segregating generations is done in environments that match the fields of the target clientele. Quality testing takes place with end users before more expensive yield trials. Once a new variety is produced it is immediately tested with farmers in participatory varietal selection (PVS) trials in the target population of environments - the farmers' fields (see PSP33). The wider adoption of this improved method of breeding new varieties has profound implications for increasing food security as it can produce much higher yielding varieties in situations where modern plant breeding had previously produced none. When produced: The PSP research began only in 1997 and the first varieties from the programme were produced by 2000. The products of COB were more widely tested from about 2002. The research has been pioneering and is the best documented body of work in this area. Other examples of COB are rare, generally poorly documented, and usually have been concerned with the empowerment of farmers rather than, as in our case, improving the efficiency of plant breeding. None have tried the few-cross, high-population-size method of breeding. Problem addressed and description of outputs: Low-resource farmers in marginal areas usually grow either obsolete varieties (low yielding and disease susceptible varieties that were released often more than 20 years before) or landraces (Witcombe et al., 1998). This causes low yields and consequent food deficits. We found that although PVS was often able to identify suitable varieties among those that already existed this was not always possible. For example, no maize variety was found that was suitable for drought prone areas of western and eastern India and the best upland rice variety identified by PVS for western and eastern India had undesirable traits such as poor lodging resistance. COB provided a means of rapidly producing better material based on the best germplasm identified in PVS. In several cases the varieties produced by COB have been officially released. Farmers have adopted new varieties from COB that were of a higher utility to them (a combination of improved agronomic traits, higher yield, and improved quality) and were superior to any available alternatives. As a result of this research, we are able to say that COB is cost-effective and produces widely adapted varieties; for example, COB varieties produced in Chitwan, Nepal perform well throughout the entire Terai region of Nepal and in Bangladesh. We have also been able to confirm that making very few crosses is both effective and much cheaper than conventional methods. Adoption of COB varieties by farmers increased on-farm biodiversity and improved livelihoods of resource poor farmers (Mottram, 2005; Virk et al., 2005).
The process of COB is not commodity specific and is applicable to all crops in all agricultural systems. It has been used in most farming systems but has been extensively used in semi-arid systems, smallholder rainfed dry/cold farming system and wetland rice-based system (Witcombe et al., 2005). It has been used in the following crops:
COB is, compared to other interventions such as seed priming or participatory varietal selection, a relatively complex process that involves specific scientific interests (plant breeding) with farmer participation. It could be aligned with work that involves farmer field schools as training of farmers in COB is required for maximum effectiveness. The PVS stage of COB involves the testing of a new intervention - a crop variety - with farmers in the farmers' fields. Other interventions can be tested that are synergistic with new crop varieties such as improved crop agronomy, including seed priming (e.g., cluster PSP30), and crop protection. Since farmers evaluate material for all traits including fodder quantity and quality then clustering with improved livestock nutrition would be an advantage. PVS (cluster PSP33) is an essential technique for COB. PVS is also and an essential component in participatory approaches to replacing rice fallows (cluster PSP35). COB is also synergistic with all RNRRS outputs relating to the provision of seed and can involve community based seed production (cluster PSP36). How the outputs were validated: How validated: The validation stage of COB is the value of new varieties produced by the breeding. This has always used PVS where validation is always by the first end users of a new variety - farmers - in on-farm participatory trials. These use participatory evaluation (employing many techniques e.g., matrix ranking, surveys, organoleptic assessment) of many traits considered important by farmers. The trials were always replicated to provide a test of statistical significance. Where grain quality was important end users such as millers, traders and consumers helped test post-harvest quality traits. Validation of yield increases was often done by government organisations in on-station trials. See also outcome assessments under "Poverty Impact Studies". The final step of PVS - the wider dissemination of farmer-preferred varieties - tests the acceptability of a variety on a much larger scale and varieties bred using COB in a single location in Nepal have done well throughout the low-altitude areas of Nepal and in Bangladesh (Joshi et al., 2006). Varieties bred in eastern India have been recommended in states in western India. Who validated: Validation was done by farmers working with researchers from many organisations who were involved in the validation process [1]: The target groups of male and female farmers were from all social groups representing resource rich, medium and poor farmers. Wealth categories (usually three) were determined through local informants using key proxies for wealth such as landholding size. Evaluation of PVS trials included participating farmers (with a representative proportion of women) and their neighbours, relatives and friends (this always included some women). The evaluation of the post-harvest traits always involved women. [1] Including:
Table 1. Examples of yield increase of new varieties from COB
Table 2. Examples of improvement in traits other than grain yield.
Where the Outputs were Validated: Validation of the process: this is related to the number of cases where COB has been effective. It has produced validated results in three countries and two crops, so far, namely rice and maize.
The validation of the few cross breeding strategy has been done over four crosses in rice (three were successful) to give a statistically significant improvement in the success rate compared with conventional breeding. COB has also been tested in cassava in Ghana and there are preliminary results from chickpea and other legumes in India. Products: Thousands of farmers, in collaboration with NGOs and GOs, validated the products of COB in three countries (India, Nepal, and Bangladesh) over wide areas. For where and when see Table 3. The process was validated across very diverse farming systems ranging from marginal rainfed to high potential production systems. There were never fewer than hundreds of farmers involved in the PVS of varieties produced by COB as the validation was replicated in each year and done across at least three years (Table 3). Table 3. Regions and farming systems where the outputs were validated. In all cases, validation was with thousands of farmers.
Who are the Users? Here we are concerned with the COB as a process rather than the varieties produced by the process (detailed in other clusters). COB is now integral to the rice innovation system in Nepal where LI-BIRD works with CAZS-NR and NARC to carry out a continuing programme. The breeding programme has many varieties that are in advanced trials (including Sugandha 2002 and Barkhe 2014 that have already been identified for release proposals to be made in 2006/07). LI-BIRD, in its adoption of COB, uses all of the major elements developed by the PSP research projects i.e., client-oriented objectives, careful choice of parents, few crosses, selection in the target population of environments, quality testing before yield trials, and yield testing through PVS mother and baby trials. NARC collaborates in this programme. More recently PROVA are collaborating with LI-BIRD and CAZS-NR, using germplasm supplied by the latter, in a rice breeding programme for the high Barind Tract. Products from COB programmes are currently being tested in on-station and PVS trials. These include chickpea, horsegram and blackgram in India, maize in eastern and western India, rice and kidney bean in Nepal, and cassava in Ghana. We are convinced that many other breeding programmes have adopted elements of the approach but resources have not been available to carry out a detailed survey. For example, in the rice and wheat breeding programmes in Nepal there has been a reduction in the number of crosses that are made and we have reasons to believe this is also true in certain wheat breeding programmes in Bangladesh. Other collaborators have proven to be remarkably resistant to change even though they have collaborated with CAZS-NR for many years. In IRRI the recommendation to have high volume crossing (Mackill et al., 1966) has been dropped in the latest breeding manual (Fischer et al., 2003) that now has specific reference to some of the PSP work. As a result of training courses to African national programme plant breeders there is evidence of elements of the approach being adopted in Africa but no detailed survey has yet been made. Where the outputs have been used: The areas are:
Scale of Current Use: The current use of COB may be limited in terms of crops, countries and organisations but in terms of potential outputs (varieties) from COB the scale is large. In the case of rice alone, the COB targets at least 1 M ha of there 1.5 M ha of rice in Nepal and can produce varieties suitable for much of the 14 M ha of rice in Bangladesh and for at least 10 M ha in India. We have reason to believe that elements of the process are still spreading as awareness of the method increases through publications from the PSP research. Many of the publications in the area have just been published (2006), are in press, or will be published in 2007 (or later). Policy and Institutional Structures, and Key Components for Success: The rice breeding programme in Nepal is an interesting example of the adoption of the process of COB. LI-BIRD, the NGO, has completely adopted all of the elements of the breeding scheme. NARC, through its National Rice Research Programme (NRRP) collaborates in this programme. It tests varieties from COB in its disease nurseries and enters them into its on-station yield testing. It also provides its own varieties to LI-BIRD for testing in PVS trials. However, its own rice breeding programmes have been less affected and they continue on more traditional grounds although there is evidence that the NRRP now makes fewer, more carefully chosen crosses. The NRRP is also a co-proposer on varieties bred by COB such as Barkhe 3004. Key factors in the success in Nepal have been specific collaboration in research related to COB over a long period of time and the putting in place of a formal collaboration with LI-BIRD and NRRP. This enabled breeders in the NRRP to officially collaborate on more participatory approaches and allowed many opportunities for NRRP scientists to learn of these approaches. In the Institute of Agriculture and Animal Sciences (IAAS), Tribhuvan University, Rampur, some uptake of the concept of COB is evident at both the graduate and postgraduate level, e.g., COB concepts are included in assignments, seminars and examinations but are yet to be included formally into the curriculum of the University. Lessons Learned and Uptake Pathways Promotion of Outputs: Promotion of COB is still being undertaken by CAZS-NR in the form of publications on COB that describe its effectiveness, and its input on training courses for African Plant Breeders (see Annex 1). In addition, CAZS-NR is promoting these methods in Ethiopia through projects funded by Ireland Aid. LI-BIRD continues to promote COB by its advocacy and its ongoing COB programme. Promotion is also occurring through what is now a Rockefeller funded project in eastern India for the client-oriented breeding and dissemination of upland rice in eastern India. The Gramin Vikas Trust continues to promote COB and other related methods through its continuing involvement with State Agricultural Universities and the Madhya Pradesh Rural Livelihoods Project (MPRLP). Scientists in SAUs in Bihar, Gujarat, Rajasthan and MP have been trained in COB techniques. The extent of adoption was assessed (Gill et al., 2006) and there was some adoption. Potential Barriers Preventing Adoption of Outputs: Some, but not all, of the organisations that have directly worked with RNRRS projects have adopted the COB process but they have not taken steps to promote it with others so there is a lack of awareness of the new approaches. This is, in part, because evidence has only recently been produced on the effectiveness of the COB approach. Key papers are only 'in press' in 2006 and others are still under review. As with PVS, a huge barrier is the mindset of breeders who have been taught about the effectiveness of the classic 'green revolution' approach that involves on-station breeding for wide adaptation and the making of hundreds of relatively poorly chosen crosses each year. This poor discrimination is an inevitable consequence of making many crosses; as the number goes up the quality has to go down as the best choices have already been made. How to Overcome Barriers to Adoption of Outputs: The most important factor to remove the barriers are the changes in mindsets through wide scale training of GO and, to a lesser extent, NGO staff in the COB process to appreciate the impact that it can have. There is a limited human resource capacity, particularly in GOs, on participatory approaches to research. In NGOs there is a limited capacity on seed-related issues and most would regard plant breeding as being well beyond their capabilities. We do not believe this to be true since the COB methods are highly simplified and adapted for use by NGOs that have no access to a research station. Moreover, NGO/GO collaboration has been shown to be possible and effective for COB. Policy makers need to be brought into this dialogue about breeding methods as they are rarely involved. There needs to be changes in curricula in Universities to mainstream participatory, client-oriented approaches to plant breeding. Lessons Learned: Using Rogers (2003) diffusion of information as a framework for the lessons learnt:
Hence training of scientists is the most important factors in getting this research into use with target institutions. Poverty Impact Studies: India
Nepal
Bangladesh
Financial analysis: As one example of economic benefit from COB we calculated the benefits of the production of two upland rice varieties for eastern India. By 2010 the benefits were estimated to be in the region of £20 million using a 10% discount rate (see PSP16). How the Poor have Benefited (including gender and other poverty groups): The yield gains in all of the COB programmes clearly show that the participating farmers benefited from the new varieties (Table 1). The increased yields increased household food self-sufficiency and in food surplus households cash income increased from additional grain sales. Outcome assessments showed improvements in health care, schooling and nutrition. One example of manifold impacts is:
Impacts (shown in rectangles) of the adoption of Ashoka 200F and Ashoka 228 in eastern India. Direct effects (bold), multiplier effects (italics) and farming system effects (underlined). Source Mottram (2005). More examples of impact are outlined in the following PSP clusters:
Direct and Indirect Environmental Benefits: Direct and indirect benefits:
Adverse Environmental Impacts:
Coping with the Effects of Climate Change, or Risk from Natural Disasters:
References Evenson, R.E & Gollin, D. (2003) Assessing the Impact of the Green Revolution, 1960 to 2000. Science 300: 758 - 762. Fischer, K.S., Lafitte, R., Fukai, S., Atlin, G., Hardy, B. editors. (2003). Breeding rice for drought-prone environments. International Rice Research Institute (IRRI), Philippines Gill, G., Stirling, C.M. & Katyal, J.C. (2006). Western India Rainfed Farming Project Impact Assessment of Component C: Participatory Technology Development. Report Commissioned by DFID India. Gyawali, S., Sunwar, S., Subedi, M., Tripathi, M., Joshi, K.D. & Witcombe, J.R. (2006). Collaborative breeding with farmers can be effective. Field Crops Research (in press). IPCC (2001). Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change [eds: Houghton, J.T.,Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Joshi, K.D. & Witcombe, J.R. (2003). The impact of participatory plant breeding (PPB) on landrace diversity: a case study for high-altitude rice in Nepal. Euphytica 134: 117-125. Joshi, K.D., Sthapit, B.R., Subedi, M. & Witcombe, J.R. (2002). Participatory plant breeding in rice in Nepal. In: Farmers, Scientists and Plant Breeding: Integrating Knowledge and Practice, David A Cleveland & Daniela Soleri. Joshi, K.D., Musa, A.M., Johansen, C., Gyawali, S., Harris, D. & Witcombe, J.R. (2006). Highly client-oriented breeding, using local preferences and selection, produces widely adapted rice varieties. Field Crops Research (in press). Mackill, D.J., Coffman, W.R. & Garrity, D.P. (1996) Rainfed lowland rice improvement. International Rice Research Institute (IRRI), Philippines. Mottram, A. (2005). Impact of new upland rice varieties in eastern India from client-oriented breeding: evidence from whole village surveys. Available at www.dfid-psp.org pp. 1-15. Rogers, E.M. (2003). Diffussion of innovations. 5th Edition. New York: Free Press. Tiwari, T.P., Virk, D.S & Sinclair, F.L (2001). Participatory crop improvement for intercropped maize on bari land terraces with trees. Paper presented in an international symposium on participatory plant breeding and participatory plant genetic resource enhancement: An exchange of experiences from South and South East Asia held at Pokhara, Nepal from 1-5 May, 2000. Tiwari, T.P., Brook, R.M. & Sinclair, F.L. (2004). Implications of hill farmers' agronomic practices in Nepal for crop improvement in maize. Experimental Agriculture 40: 397-417. Virk, D.S. Chakraborty, M. Ghosh, J. Prasad, S.C. & Witcombe, J.R. (2005). Increasing the client orientation of maize breeding using farmer participation in eastern India. Experimental Agriculture 41: 413-426. Virk, D.S., Singh, D.N., Kumar, R., Prasad, S.C., Gangwar, J.S. & Witcombe, J.R. (2003). Collaborative and consultative participatory plant breeding of rice for the rainfed uplands of eastern India. Euphytica 132:95-108. Witcombe, J.R. & Virk, D.S. (2001). Number of crosses and population size for participatory and classical plant breeding. Euphytica 122:451-462, 2001 Witcombe, J.R., Joshi, A. & Goyal, S.N. (2003). Participatory plant breeding in maize: A case study from Gujarat, India. Euphytica 130:413-422. Witcombe, J.R., Joshi, K.D., Gyawali, S., Musa, A.M., Johansen, C., Virk, D.S. & Sthapit, B.R. (2005). Participatory Plant Breeding is Better Described as Highly Client-Oriented Plant Breeding. I. Four Indicators of Client-Orientation in Plant Breeding. Experimental Agriculture 41: 299-319. Witcombe, J.R., Packwood, A.J., Raj, A.G.B. & Virk, D.S. (1998). The extent and rate of adoption of modern cultivars in India. pp. 53-68 in Seeds of Choice. Making the most of new varieties for small farmers. J.R. Witcombe, D.S. Virk and J. Farrington (Eds). Published by Oxford IBH, New Delhi and Intermediate Technology Publications, London. Annex 1. International training courses on 'participatory crop improvement' led by CAZS-NR or with significant contributions from CAZS-NR staff
Abbreviations not found elsewhere in the text:
Relevant Research Projects,
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For relevant research projects, with links to further information
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