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Chaves, Lázaro José[Criterios para escoger progenitores para un programa de selección recurrente]Criterios para escoger progenitores para un programa de selección recurrente

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

Participatory varietal selection (PVS) was used to try to identify an alternative to the most popular rice variety, Pusa 44, in the Patiala district of the Punjab. Pusa 44 (released in 1993 in India but not recommended for the Punjab) is grown in over 50% of the rice area in Patiala. It is highly...


Mali, S.S.Virk, Daljit S.Singh, K.B.Witcombe, John R.[Participatory varietal selection in rice in the Punjab]Participatory varietal selection in rice in the Punjab

A survey of nearly 1500 households in the high-potential production system (HPPSs) of the Chitwan and Nawalparasi districts of Nepal showed gre.t physical and socioeconomic diversity. Varietal diversity was low in all the crops studied and varied according to location in main-season rice. Masuli ...


Joshi, Krishna D.Witcombe, John R.[Participatory varietal selection, food security, and varietal diversity in a high-potential production system in Nepal]Participatory varietal selection, food security, and varietal diversity in a high-potential production system in Nepal

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

This paper describes the agricultural situation in Maramche. Village learners have been participating with Ihe Local initiatives for Biodiversity Research and Development (LI-SIRD), testing improved varieties of paddy rice. Details of the qualities of the new varieties. Qualities preferred by Ihe...


Poudel, Chandra KantaDil Bahadur, K.C.Poudel, Sita[Role of farmers in the improvement of crops: New species of paddy in Maramche]Role of farmers in the improvement of crops: New species of paddy in Maramche

Kalewar, Ram Ashraya Saha[Local species: Methods of cultivation, some successes and some problems]Local species: Methods of cultivation, some successes and some problems

Farmers from the village of Chhomrong in Nepal describe their experiences with experimental varieties of paddy rice, growing experimental varieties and selecting for specific qualities, in an initiative that started in 1993.


Gurung, Om BahadurGurung, NajarmanGurung, Min KumariGurung, Nauli[How did the farmers of chhomrong improve the local paddy species?]How did the farmers of chhomrong improve the local paddy species?

Farmers describe their activities investing in and developing their agricultural output, with details of their production and Suwarna paddy rice (an improved variety).


Bhandari, Jhapdad Bahadur[Role of farmers in selecting crop species]Role of farmers in selecting crop species

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