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A genetic linkage map of cassava has been constructed with 132 RFLPs, 30 RAPDs, 3 microsatellites, and 3 isoenzyme markers segregating from the heterozygous female parent of an intraspecific cross. The F1 cross was made between ‘TMS 30572’ and ‘CM?2177-2’, elite cassava cultivars from Nigeria and...


Fregene, Martin A.Angel, F.Gómez, R.Rodríguez, F.Chavarriaga Aguirre, PaulRoca, William M.Tohme, Joseph M.Bonierbale, Merideth W.[A molecular genetic map of cassava (Manihot esculenta Crantz)]A molecular genetic map of cassava (Manihot esculenta Crantz)

Viruses causing severe mosaic, epinasty, defoliation, and premature death of Passiflora spp. were isolated from west central Colombia. Western blot analyses indicated the presence of potyviruses. Two Colombian isolates (COL-22 and -GR) were compared to known potyviruses as to host range, symptoma...


Benscher, DPappu, SSNiblett, CLVaron de Agudelo, F.Morales, Francisco JoséHodson de Jaramillo, EÁlvarez, E.Acosta, O.[A strain of soybean mosaic virus infecting Passiflora spp. in Colombia]A strain of soybean mosaic virus infecting Passiflora spp. in Colombia

The quality of cassava starch, an important trait in cassava breeding programs, determines its applications in various industries. For example, development of waxy (having a low level of amylose) cassava is in demand. Amylose is synthesized by granule-bound starch synthase I (GBSSI) in plants, an...


Zhao, SSDufour, D.L.Sánchez, T.Ceballos, H.Zhang, P.[Development of waxy Cassava with different biological and physico-chemical characteristics of starches for industrial applications]Development of waxy Cassava with different biological and physico-chemical characteristics of starches for industrial applications

A wilt and eventual dieback disease ot the forage legume Stylosanthes guianens which occurs widely in Colombia and Brazil, is described. The causal agent of the wilt disease is identified as Lasiodiplodia theobromae, a virulent, unspeciaIized, facultative, wound pathogen with worldwide distributi...


Kelemu, SegenetBadel, JLFernandes, C.D.[A new dieback disease of the forage legume Stylosanthes guianensis in South America]A new dieback disease of the forage legume Stylosanthes guianensis in South America

Local communities often have substantial knowledge related to trends in soil quality and the associated limiting factors. Despite this, soil quality (SQ) degradation is a critical problem in Ethiopia and there is little or insufficient scientific information documenting local community experience...


Brhane Tesfahunegn, GebrayesusTamene, LulsegedVlek, Paul L.G.[A participatory soil quality assessment in Northern Ethiopia's Mai-Negus catchment]A participatory soil quality assessment in Northern Ethiopia's Mai-Negus catchment

Low soil phosphorus (P) has been singled out as a major constraint leading to perpetually low bean (Phaseolus vulgaris L.) grain yield far below the expected yield potential. In developing countries beans are mainly produced by small-scale farmers who have little capacity to use inorganic fertili...


Kimani, JMKimani, P.M.Githiri, SMKimenju, J.W.[Mode of inheritance of common bean (Phaseolus vulgaris L.) traits for tolerance to low soil phosphorus (P)]Mode of inheritance of common bean (Phaseolus vulgaris L.) traits for tolerance to low soil phosphorus (P)

Brachiaria species are widely sown on the infertile and Al-toxic soils of neotropical savannas. Breeding programs seek to combine edaphic adaptation with other traits in interspecific hybrids. Edaphic adaptation is difficult to assess because it is only manifest in pasture persistence across seve...


Wenzl, PeterArango Vélez, AdrianaChavez, Alba L.Buitrago González, M.E.Patino, GMMiles, John W.Rao, Idupulapati M.[A greenhouse method to screen brachiariagrass genotypes for aluminum resistance and root vigor]A greenhouse method to screen brachiariagrass genotypes for aluminum resistance and root vigor

Resistance to Fusarium root rot (FRR) in common bean is documented as a quantitative trait and as such is greatly influenced by several environmental factors. A reproducible disease screening technique that considers the selection environment is therefore important in selecting resistant lines....


Mukankusi, Clare MugishaMelis, RDerera, J.Buruchara, Robin A.Mark, D[A screening technique for resistance to Fusarium root for of common bean]A screening technique for resistance to Fusarium root for of common bean

In low-input systems, where most nutrients become available from soil organic matter (SOM) and residue turnover, the applicability of DSSAT (Decision Support System for Agrotechnology Transfer) crop simulation models is limited because (i) it recognizes only one type of SOM (i.e., humus) and rece...


Gijsman, AJHoogenboom, GerritParton, WJKerridge, Peter C.[Modifying DSSAT crop models for low-input agricultural systems using a soil organic matter-residue module from Century]Modifying DSSAT crop models for low-input agricultural systems using a soil organic matter-residue module from Century
Mistura, C.C.Barbieri, R.L.Castro, C.Padulosi, S.Alercia, A.[Descriptors for on-farm conservation and use of Butia odorata natural populations]Descriptors for on-farm conservation and use of Butia odorata natural populations

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