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Random amplified polymorphic DNA (RAPD) markers were used for assessing genetic diversity and its structure in a collection of the drought-tolerant, tropical multipurpose shrub legume Flemingia macrophylla (Willd.) Merrill. The species is especially suited to low-input smallholder production syst...


Andersson, Meike S.Peters, MichaelSchultze-Kraft, RainerGallego Sánchez, Gerardo J.Duque E., Myriam Cristina[Molecular characterization of a collection of the tropical multipurpose shrub legume Flemingia macrophylla]Molecular characterization of a collection of the tropical multipurpose shrub legume Flemingia macrophylla

The purpose of this study is to define the range of adaptation of Stylosanthes guianensis CIAT 184, released in 1985 as cv. Pucallpa by IVITA (Instituto Veterinario de Investigaciónes Tropicales y de Altura) and INIPA (Instituto Nacional de Investigación y Promoción Agropecuaria) in Peru. Data fr...


Amézquita, María CristinaToledo, José M.Keller-Grein, Gerhard[Agronomic performance of Stylosanthes guianensis cv. Pucallpa in the American tropical rain forest ecosystem]Agronomic performance of Stylosanthes guianensis cv. Pucallpa in the American tropical rain forest ecosystem

A severe disease was observed in the potato variety Criolla Colombiana . Main symptomatology consisted of discoloration or yellowing of the whole plant, apical leafroll, dwarfing, axillary buds and thicker internodes. Phytoplasmas related to 16SrV and 16SrXII groups were identified by nested PCR...


Mejía, Juan FernandoContaldo, N.Paltrinieri, SPardo, Juan ManuelRios, CAÁlvarez, E.Bertaccini, A[Molecular detection and identification of group 16SrV and 16SrXII phytoplasma associated with potatoes in Colombia]Molecular detection and identification of group 16SrV and 16SrXII phytoplasma associated with potatoes in Colombia

A study on the seasonal diets of camels, cattle, sheep, and goats in a common range in northern Kenya carried to gather information as a basis for better management of the Semi-Arid rangelands of eastern Africa.


Migongo-Bake, W.Hansen, R.M.[Seasonal diets of camels, cattle, sheep, and goats in a common range in eastern Africa]Seasonal diets of camels, cattle, sheep, and goats in a common range in eastern Africa

Cultivars of common bean (Phaseolus vulgaris L.) capable of yielding well at low levels of native or added phosphorus (P) are highly desirable in many tropical production systems. The objective of the present study was to identify geographical regions which might be sources of such genotypes. A t...


Beebe, Stephen E.Lynch, JGalwey, Nicholas W.Tohme, Joseph M.Ochoa, IE[A geographical approach to identify phosphorus-efficient genotypes among landraces and wild ancestors of common bean]A geographical approach to identify phosphorus-efficient genotypes among landraces and wild ancestors of common bean

Crop wild relatives that have experienced multiple and independent domestication events provide an excellent model for understanding adaptation processes in crop populations and a first and relevant aspect to investigate is the geographic origin of landraces. The aim of this research was to estab...


Motta Aldana, JRSerrano Serrano, Martha L.Hernández Torres, JorgeCastillo Villamizar, GenisDebouck, Daniel G.Chacón Sánchez, María I.[Multiple origins of Lima Bean landraces in the Americas: evidence from chloroplast and nuclear DNA polymorphisms]Multiple origins of Lima Bean landraces in the Americas: evidence from chloroplast and nuclear DNA polymorphisms

Decline in crop yields is a major problem facing smallholder farmers in Kenya and the entire Sub-Saharan region. This is attributed mainly to the mining of major nutrients due to continuous cropping without addition of adequate external nutrients. In most cases inorganic fertilizers are expensive...


Kimetu, J.M.Mugendi, DNPalm, C.A.Mutuo, PKGachengo, CNBationo, B. André[Nitrogen fertilizer equivalencies of organics of differing quality and optimum combination with organic nitrogen source in Central Kenya]Nitrogen fertilizer equivalencies of organics of differing quality and optimum combination with organic nitrogen source in Central Kenya

Leaves of nine green manure (GM) species were surface applied to a tropical volcanic-ash soil at a rate of 100 kg N ha 1 in order to evaluate their N-fertilizer value in a glasshouse experiment. GM treatments were compared to urea at two rates, 50 kg N ha 1 (FN50) and 100 kg N ha 1 (FN100), and t...


Cobo Borrero, Juan G.Barrios, E.Kass, DCLThomas, Richard J.[Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil]Nitrogen mineralization and crop uptake from surface-applied leaves of green manure species on a tropical volcanic-ash soil

The knowledge and understanding of the genetic structure of bean (Phaseolus vulgaris L.) landraces is important for the implementation of measures addressed to their management and conservation. The purpose of this paper was to study the pattern of genetic variation in nine red-seeded landraces c...


Gómez, O.J.Blair, Matthew W.Frankow-Lindberg, BEGullberg, U[Molecular and phenotypic diversity of common bean landraces from Nicaragua]Molecular and phenotypic diversity of common bean landraces from Nicaragua

Using AFLPs, 71 peppers (Capsicum) accessions from the species C. chinense Jacq., C. baccatum L., C. annuum L. and C. frutescens L. from indigenous communities of the Amazon Department (Colombia) were studied to assess the genetic diversity of the collections, and delineate species gene groups. T...


Toquica, SPRodríguez, F.Martínez, E.Duque E., Myriam CristinaTohme, Joseph M.[Molecular characterization by AFLPs of Capsicum germplasm from the Amazon department in Colombia, characterization by AFLPs of Capsicum]Molecular characterization by AFLPs of Capsicum germplasm from the Amazon department in Colombia, characterization by AFLPs of Capsicum

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