SUMMARY 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...

In this paper we attempt to remove the dichotomy created by distinguishing between participatory and non-participatory breeding programmes using degree of client orientation as basis for an analysis. Although all are implicitly client-oriented, examine how approaches explicitly increase extent orientation. We briefly review history plant (PPB) analyse techniques used at different stages programme. common with several other authors, find that farmer involvement in selecting segregating...

Few public sector rice breeders have the capacity to use NGS-derived markers in their breeding programmes despite rapidly expanding repositories of genome sequence data. They rely on > 18,000 mapped microsatellites (SSRs) for marker-assisted selection (MAS) using gel analysis. Lack knowledge about target SNP and InDel variant loci has hampered uptake by many Kompetitive allele-specific PCR (KASP), a proprietary technology LGC genomics that can distinguish alleles at loci. KASP is...

SUMMARY Farmer participatory varietal selection (PVS) was used to identify farmer-acceptable cultivars of rice and chickpea. Farmers' requirements in new crop (varieties) were determined, a search carried out for released non-released that matched these needs, they tested farmer-managed, trials. Farmer-acceptable found amongst material, but not among the recommended material area. Lack adoption is, therefore, because resource-poor farmers have been or exposed most appropriate under existing...

SUMMARY A participatory plant breeding (PPB) programme was conducted for the high altitude areas of Nepal. The aim to breed acceptable varieties with minimum use resources and utilize farmers' knowledge in PPB programme. Farmer participation began at F 5 stage progress followed over two seasons villages. Farmers proved be willing participants made selections segregating material, often great success. Large differences preferences between bulks were found most preferred adopted rapidly....

Rice cultivars ( Oryza sativa L.) that are adapted to high altitude areas of the sub‐tropics, such as Nepal, have germinate and rapidly synthesize chlorophyll in emerging plumule at chilling temperatures. This study was conducted determine, temperature 17°C, heritabilities four traits: germination, rate germination (RG) index, greening, vigor. Estimates were made F 3 generation two crosses between Nepalese chilling‐tolerant a chilling‐susceptible cultivar. Most traits significantly...

Downy mildew, caused by the pathogen Sclerospora graminicola (Sacc.) J. Schröt, can cause devastating yield losses in pearl millet [Pennisetum glaucum (L.) R. Br.]. Breeding for resistance to downy mildew is facilitated an artificial glasshouse screening method that be used worldwide. Quantitative trait loci (QTLs) mapping was determine whether QTLs identified under field conditions India were also detected screens carried out and UK. mapped using 114 individual progeny derived from a...

Many public-sector breeding programmes do not use explicit techniques to orient their close clients' needs. Participatory can be used achieve high client orientation but these have involve farmers making selections during the segregating generations. This particularly applies when a sound initial market survey has been made or learning from participatory varietal selection (PVS) programme provides feedback scientists. However, some published results on by in generations (collaborative...

Crop yields have to increase provide food security for the world's growing population. To achieve these yield increases there will be a significant contribution from genetic gains made by conventional plant breeding. However, breeding process is not efficient because crosses between parental combinations that fail produce useful varieties consume over 99% of resources.We tested in rice-breeding programme if its efficiency could improved using many fewer, but more judiciously chosen than...

Participatory varietal selection in a development project western India showed that the rice ( Oryza sativa ) variety Kalinga III was highly preferred by farmers. The spatial diffusion of this from three villages (two and one non-project) studied. Seed had spread 1994 to 41 1996 is estimated have reached over 100 widely distributed 1997. Farmer-to-farmer as high non-project case study village received no further seed project, possibly because farmers are more likely new other when they...