Varietal selection is particularly difficult for very heterogeneous environments where farmers have a range of preferences. To address these issues in Rwanda, local bean experts, generally women, are invited to the research station to assess cultivars and to select those they prefer for their plots. Farmers use observed yield as only one of several criteria to predict varietal performance in their more stressed home environments. The varieties they choose are often higher yielding on-farm and are retained longer by farmers than those selected by the breeders. The results of early farmer involvement also compare favourably with those of the standard breeding programme in terms of enhanced genetic diversity and reduced research costs. There are few pre-conditions for developing such a client-driven breeding programme.Papel del agricultor en la selection de variedades para una estation investigation RESUMEN La selection de variedades resulta particularmente dificil para los ambientes muy heterogeneos en los que los agricultores cuentan con una diversidad de preferencias. En Rwanda, para solucionar este inconveniente, los expertos en porotos locales, generalmente las mujeres, son invitadas a la estacion de investigacion para evaluar las variedades de cultivo y seleccionar las de su preferencia para sus propias parcelas. Los agricultores utilizan el rendimiento observado como uno de los muchos criterios para pronosticar el rendimiento de las variedades en las condiciones mas adversas de sus propias parcelas. Las variedades escogidas generalmente son las de mayor rendimiento en finca, y son retenidas por los agricultores durante mucho mas tiempo que las variedades seleccionadas por los reproductores de semillas. Los resultados de esta temprana participation de los agricultores tambien se compararon favorablemente con los de los programas de reproduction estandar en lo que se refiere a la mejora de la diversidad genetica y la reduction de los costos de investigacion. Existen pocas condiciones previas para el dessarrollo de un programa de reproduction dirigido por sus propios clientes tal como el que aqui se presenta.
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