Farmer Participatory Crop Improvement. I. Varietal Selection and Breeding Methods and Their Impact on Biodiversity

摘要: Farmer participatory approaches for the identification or breeding of improved crop cultivars can be usefully categorized into varietal selection (PVS) and plant (PPB). Various PVS PPB methods are reviewed. is a more rapid cost-effective way identifying farmer-preferred if suitable choice exists. If this impossible, then resource-consuming required. use, as parents, that were identified in successful programmes. Compared with conventional breeding, likely to produce farmer-acceptable products, particularly marginal environments. The impact farmer research on biodiversity considered. long-term effect increase biodiversity, but where indigenous variability high it also reduce it. has greater increasing although its may limited smaller areas. dynamic form situ genetic conservation.