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Banana is an increasingly demanded food and cash crop in sub-Saharan Africa. Reported yields in smallholder farms vary substantially. The importance and spread of yield constraints have not been properly quantified. A study was carried out in Central Kenya to (i) quantify the yield levels, the pr...


Okumu, MOAsten, Piet J.A. vanKahangi, EMOkech, SHJefwa, J.M.Vanlauwe, Bernard[Production gradients in smallholder banana (cv. Giant Cavendish) farms in Central Kenya]Production gradients in smallholder banana (cv. Giant Cavendish) farms in Central Kenya

Genetic mapping of early bulking in a full-sib population of cassava was continued in a selfed family of 268 cassava plants derived from a single progeny of the full-sib population. The pseudo F2 population was analysed with 122 segregating SSR markers. A previously constructed linkage map of cas...


Okogbenin, EmmanuelMarin, JFregene, Martin A.[QTL analysis for early yield in a pseudo F2 population of cassava]QTL analysis for early yield in a pseudo F2 population of cassava

The objective of this study was to estimate the results of the upland rice (Oryza sativa L.) breeding program conducted by the Brazilian Agricultural Research Corporation (Embrapa) and collaborators over the period of 1984 to 2009 covering 25 annual steps of improvement. The best lines generated ...


Breseghello, FlávioPeixoto de Morais, OValle Pinheiro, PSimoes Silva, CMaia de Castro, E. daGuimaraes, Elcio PerpétuoPereira de Castro, APereira, JAMatos Lopes, A. deUtumi, MMPereira de Oliveira, J[Results of 25 years of upland rice breeding in Brazil]Results of 25 years of upland rice breeding in Brazil

Although direct selection for seed yield under water deficit can result in genetic gains in the common bean (Phaseolus vulgaris L.), progress could be enhanced through selection for additional traits that are related to underlying mechanisms of adaptation to water deficit. Carbon isotope discrimi...


White, Jeffrey W.Castillo Franco, JAEhleringer, JRGarcía, J.A.Singh, Shree P.[Relations of carbon isotope discrimination and other physiological traits to yield in common bean (Phaseolus vulgaris) under rainfed conditions]Relations of carbon isotope discrimination and other physiological traits to yield in common bean (Phaseolus vulgaris) under rainfed conditions

The following nine main cropping systems were evaluated: maize/maize in rotation without N-fertilizer (control); maize/cowpea in rotation where maize received N-fertilizer; maize/pigeonpea intercropping without N-fertilizer; maize/cowpea/pigeonpea in rotation where maize received N-fertilizer; ma...


Aihou, K.Sanginga, NteranyaVanlauwe, BernardDiels, J.Merkx, RCleemput, O. van[Restoration of terre de barre fertility using pigeonpea grown in rotation or intercropping with maize in the derived savanna of Benin]Restoration of terre de barre fertility using pigeonpea grown in rotation or intercropping with maize in the derived savanna of Benin

The seed yields and limitations to yield for nine pasture legumes in a tropical savanna region were defined in a 3-year field experiment at the Cerrodos Agricultural Research Centre near Brasilia (15°36' S, 47° 42' W). Assessment was based on flowering times, incidence of diseases and pests, yiel...


Andrade, Ronaldo P. deThomas, D.Ferguson, John E.[Seed production of pasture species in a tropical savanna region of Brazil. 1. Legumes]Seed production of pasture species in a tropical savanna region of Brazil. 1. Legumes

The seed yields and limitations to seed production for four tropical grass cultivars were defined via a replicated field experiment conducted over three years at the Cerrados Agricultural Research Centre near Brasilia (latitude 15° 36' S; longitude 47° 42' W) in a tropical savanna region. The fou...


Andrade, Ronaldo P. deThomas, D.Ferguson, John E.[Seed production of pasture species in a tropical savanna region of Brazil. 2. Grasses]Seed production of pasture species in a tropical savanna region of Brazil. 2. Grasses

A survey of root-knot nematodes associated with bean (Phaseolus vulgaris) roots and soils in the major bean production regions of Colombia and Peru was conducted during 1988 1989. Over 150 samples were processed for these parasites, and specimens from more than 100 of the collections were identif...


Mullin, BAAbawi, G.S.Pastor Corrales, Marcial A.Kornegay, Julia L.[Root-knot nematodes associated with beans in Colombia and Peru and related yield loss]Root-knot nematodes associated with beans in Colombia and Peru and related yield loss

Pedigree selection for seed yield, using early generation yield tests, was practiced from the F2 to F7 in two populations of common bean (Phaseolus vulgaris L.) in three plant densities: 66, 133, and 266 thousand plants ha-1 at CIAT-Palmira, Colombia. The six highest yielding lines selected from ...


Singh, Shree P.Guiterrez, JA[Effect of plant density on selection for seed yield in two population types of Phaseolus vulgaris L]Effect of plant density on selection for seed yield in two population types of Phaseolus vulgaris L
Dextre, R.Ayarza, Miguel AngelToledo, José M.Calderón, M.Lenne, J.M.Pizarro, Esteban A.[Pasture germplasm evaluation and agronomy]Pasture germplasm evaluation and agronomy

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