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Hybridization of synthetic allotetraploids of S. pinnatisectum with S. etuberosum (4x-EP) with S. acaule (2n = 4x = 48) resulted in two individuals that were highly fertile, in contrast to all other progenies. The unique individuals are hexaploids, 2n = 72, while the other progenies are tetraploi...


Chavez, R.Brown, CRIwanaga, Masaru[Application of interspecific sesquiploidy to introgression of PLRV resistance from non-tuber-bearing Solanum tuberosum to cultivated potato germplasm]Application of interspecific sesquiploidy to introgression of PLRV resistance from non-tuber-bearing Solanum tuberosum to cultivated potato germplasm

The main responsibility of CIAT as a curator of the world`s cassava germplasm is to assure long-term conservation at low risk of genetic loss and to facilitate access to genetic variability. The present collection of 5477 accessions is maintained both in the field and in vitro at CIAT headquarter...


Hershey, Clair H.Iglesias, C.A.Iwanaga, MasaruTohme, Joseph M.[Definition of a core collection for cassava]Definition of a core collection for cassava
Mafla, G.Roca, William M.Reyes, R.Roa E, J.C.Muñoz M, L.Baca, AEIwanaga, Masaru[In vitro management of cassava germplasm at CIAT]In vitro management of cassava germplasm at CIAT

Esterase isozymes were chosen for fingerprinting CIAT`s cassava germplasm colleciton, because of (1) their technical repeatability; (2) high polymorphism (i.e., many alleles per locus); and (3) high numner of bands detectable in cassava clones (i.e., at least a few loci are expressed). A total of...


Ocampo Nahar, César H.Hershey, Clair H.Iglesias, C.A.Iwanaga, Masaru[Esterase isozyme fingerprinting of the cassava germplasm collection held at CIAT]Esterase isozyme fingerprinting of the cassava germplasm collection held at CIAT
Iwanaga, MasaruMaass, Brigitte L.Hidalgo, Rigoberto J.[Plant genetic resources : the key to CIAT`s mission to help national agricultural systems]Plant genetic resources : the key to CIAT`s mission to help national agricultural systems

The use of ploidy manipulations in potato breeding has been successfully applied by breeders at the International Potato Center (CIP) as a tool for germplasm enhancement and for the introduction of desirable genes of wild species into the cultivated gene pool. This methodology consists in reducin...


Ortiz, R.Iwanaga, MasaruPeloquin, S.J.[Breeding potatoes for developing countries using wild tuber bearing Solanum spp. and ploidy manipulations]Breeding potatoes for developing countries using wild tuber bearing Solanum spp. and ploidy manipulations

The responsibility of CIAT`s Genetic Resources Unit in the preservation of germplasm of beans (Phaseolus), cassava and its wild relatives (Manihot), and tropical forages (legumes and/or grasses) is pointed out. The main characteristics of the collections are indicated. Distribution, improvement a...


Iwanaga, MasaruMaass, Brigitte L.Hidalgo, R.[Recursos geneticos del CIAT: su papel en la investigacion y el desarrollo]Recursos geneticos del CIAT: su papel en la investigacion y el desarrollo

An international workshop on cassava genetic resources was recently held at CIAT. The main objectives of the meeting were to assess the present status of cassava germplasm conservation and use, and to examine the possibility of establishing a global network for cassava genetic resources. A global...


Iglesias, C.A.Iwanaga, Masaru[Cassava genetic resources: a global approach for conservation and use]Cassava genetic resources: a global approach for conservation and use

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