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Despite the worldwide importance of cultivated cassava (M. esculenta Crantz) its origin and taxonomic relationships with other species in the genus have not been clearly established. We evaluated a representative sample of the crop’s diversity and six wild taxa with AFLPs to estimate genetic rela...


Roa, ACMaya, M.M.Duque E., Myriam CristinaTohme, Joseph M.Allem, ACBonierbale, Merideth W.[AFLP analysis of relationships among cassava and other Manihot species]AFLP analysis of relationships among cassava and other Manihot species
Nienhuis, JamesSkroch, Paul W.Beebe, Stephen E.Tohme, Joseph M.Pedraza García, Fabio[Comparison of genetic diversity between random samples from core and reserve collections of Phaseolus vulgaris L]Comparison of genetic diversity between random samples from core and reserve collections of Phaseolus vulgaris L
Tohme, Joseph M.Beebe, Stephen E.González, O.Duque E., Myriam Cristina[AFLP analysis of the wild Phaseolus vulgaris core collection]AFLP analysis of the wild Phaseolus vulgaris core collection
Beebe, Stephen E.Tohme, Joseph M.Nienhuis, JamesPedraza García, FabioRengifo, JTovar Luque, EIslam, A.[Studies in Phaseolus germplasm diversity: a review of work at CIAT]Studies in Phaseolus germplasm diversity: a review of work at CIAT

Assembled germplasm has provided breeders with valuable traits for the improvement of common beans. Molecular markers such as phaseolin and isozymes have facilitated understanding of the genus Phaseolus thus enabling breeders to develop more effective strategies. However, there are still gaps in ...


Tohme, Joseph M.[Existing bean variability and breeding activities at CIAT for new genetic combinations]Existing bean variability and breeding activities at CIAT for new genetic combinations

No wild Phaseolus bean germplasm is currently available from seed banks for Ecuador. Because of the decisive importance of the wild forms in evolutionary studies of the bean crops, and given the key geographical situation of that country in the northern Andes, a joint exploration was recently car...


Debouck, Daniel G.Castillo T., R.Tohme, Joseph M.[Observations on little-known Phaseolus germplasm of Ecuador]Observations on little-known Phaseolus germplasm of Ecuador
Martínez Racines, César PompilioLópez Gerena, J.Almeida, A.Tohme, Joseph M.Borrero Correa, Jaime C.[Identification and utilization of genes from wild germplasm for the improvement of yield and stress resistance in rice]Identification and utilization of genes from wild germplasm for the improvement of yield and stress resistance in rice

Nuñas are a group of common bean (Phaseolus vulgaris, Fabaceae) varieties, whose grains are consumed after toasting in their original Andean habitats. Nowadays, these varieties are restricted to certain parts of the highlands of Peru and Bolivia. Linguistic, ethnobotanical, and archaeological dat...


Tohme, Joseph M.Toro Chica, OrlandoVargas Daza, JaimeDebouck, Daniel G.[Variability in Andean nuña common beans (Phaseolus vulgaris, Fabaceae)]Variability in Andean nuña common beans (Phaseolus vulgaris, Fabaceae)
Toro Chica, OrlandoTohme, Joseph M.Debouck, Daniel G.[Wild bean (Phaseolus vulgaris L.): description and distribution]Wild bean (Phaseolus vulgaris L.): description and distribution

The cassava core collection was selected to represent, with minimum repetitiveness, the potential genetic diversity of the crop. The core (630 accessions) was chosen from the base collection (over 5500 accessions) on the basis of diversity of origin (country and geographic), morphology, isozyme p...


Chavarriaga Aguirre, PaulMaya, M.M.Tohme, Joseph M.Duque E., Myriam CristinaIglesias, C.A.Bonierbale, Merideth W.Kresovich, SKochert, G[Using microsatellites, isozymes and AFLPs to evaluate genetic diversity and redundancy in the cassava core collection and to assess the usefulness of DNA-BASED markers to maintain germplasm collections]Using microsatellites, isozymes and AFLPs to evaluate genetic diversity and redundancy in the cassava core collection and to assess the usefulness of DNA-BASED markers to maintain germplasm collections

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