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This paper describes a participatory plant-breeding (PPB) program for rice in eastern India, targeted at a range of ecosystems. Only a few crosses with large populations were used. Most resources were used on selection by farmers among progeny bulks grown on a research station, but farmers also s...


Kumar, RaviSingh, D.N.Prasad, S.C.Gangwar, J.S.Virk, Daljit S.Witcombe, John R.[Participatory plant breeding in rice in Eastern India]Participatory plant breeding in rice in Eastern India

This paper describes a participatory maize breeding program that is a collaborative project between Birs, Agricultural University and the KRlBHCO Indo-British Rain fed Farming Project (East). At the beginning of the project, a base population was produced in Ihe rainy season of 1997 by making nin...


Kumar, ArunGanguli, D.K.Prasad, S.C.Gangwar, J.S.Virk, Daljit S.Witcombe, John R.[Participatory plant breeding in maize for the Chhotanagpur plateau of Eastern India]Participatory plant breeding in maize for the Chhotanagpur plateau of Eastern India

Los frijoles (Phaseolus vulgaris L.) son un componente fundamental de la dieta y un cultivo importante en todo el Caribe. Las siembras anuales de frijoles en la región exceden 200,000 ha aunque los rendimientos son bajos -de 400 a 900 kg/ha. El frijol es producido casi todo el año en diferentes s...


Beaver, James S.Molina Castañeda, Albeiro[Mejoramiento de frijol para el Caribe]Mejoramiento de frijol para el Caribe

La historia del mejoramiento del frijol Phaseolus vulgaris en la Costa del Perú, puede dividirse en dos etapas; la primera comprendida entre 1957 y 1975, iniciada con la creación del Programa Nacional de Frijol; y la segunda, a partir de la década del 80, con el establecimiento del Programa Nacio...


Valladolid Chiroque, Angel R.[Mejoramiento del frijol para la costa del Perú]Mejoramiento del frijol para la costa del Perú

La crisis ocasionada por la deuda externa ha debilitado los programas nacionales de investigación de arroz en América Latina, y ha aumentado su dependencia de los programas regionales y mundiales del CIAT y del IRRI.Si bien el germoplasma mejorado producido por los IARC ha traído consigo cierto g...


Coffman, William R.Olufowote, J.O.Grau B., Pablo A.Villareal, Reynaldo[Un nuevo enfoque para el mejoramiento de arroz en América Latina]Un nuevo enfoque para el mejoramiento de arroz en América Latina

Maize (Zea mays L.) is the most important crop in the middle hills of Nepal and is mostly grown in association with finger millet (Eleusino coracana Gaertn) and fodder trees. Seven maize varieties have been recommended for the hills but few farmers have adopted them. As a prerequisite to designin...


Tiwari, T.PVirk, Daljit S.Sinclair, Fergus L.[Participatory crop improvement for intercropped maize on Bari land terraces with trees]Participatory crop improvement for intercropped maize on Bari land terraces with trees

The term "participatory crop improvement" is used to cover all aspects of crop improvement where farmers are involved in a participatory role. In this paper, we describe the approach and results for participatory crop improvement in wheat, in Luna Wada sub district, Gujarat, India. Nine villages ...


Virk, Daljit S.Harris, D.Raghuwanshi, B.S.Raj, A.G.BSodhi, P.S.Witcombe, John R.[A holistic approach to participatory crop improvement in wheat]A holistic approach to participatory crop improvement in wheat

There is a limit to the capacity of any breeding program, and the more crosses that are made, the, smaller The size of each cross. The theory of the optimum number of crosses in inbreeding crops is bristly Reviewed. The theory is unsatisfactory in determining the optimum number of crosses, but mo...


Witcombe, John R.Subedi, MaduJoshi, Krishna D.Witcombe, John R.[Towards a practical participatory plant-breeding strategy in predominantly self-pollinated crops]Towards a practical participatory plant-breeding strategy in predominantly self-pollinated crops

In recent years cassava has become an important raw material for various domestic needs (food, feed, alcohol and high fructose sugar). To cope with high demand for cassava roots the breeding and selection program has been intensified to identify varieties that are high yielding and having high st...


Mariscal, Algerico M.Bergantin, Reynaldo V.[Recent progress in cassava varietal improvement in the Philippines]Recent progress in cassava varietal improvement in the Philippines

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