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Roca, William M.[Cassava germplasm collection of vegetative material in Indonesia, Malaysia, and Thailand]Cassava germplasm collection of vegetative material in Indonesia, Malaysia, and Thailand
Roca, William M.Ramírez, H.Chavarriaga Aguirre, PaulMuñoz Flórez, Ligia Carmenza[Potencial de la biotecnología en el mejoramiento de frijol Phaseolus]Potencial de la biotecnología en el mejoramiento de frijol Phaseolus

Shoot tips of in vitro-grown plantlets of cassava (Manihot esculenta Crantz), representing a wide range of germplasm, were cryopreserved as follows: precultured for 3 days, cryoprotected and dehydrated for 1 h, then frozen in liquid nitrogen using a six-step protocol. After 3 h in liquid nitrogen...


Escobar Pérez, Roosevelt H.Mafla, G.Roca, William M.[A methodology for recovering cassava plants from shoot tips maintained in liquid nitrogen]A methodology for recovering cassava plants from shoot tips maintained in liquid nitrogen

Cryopreservation in liquid nitrogen of isolated zygotic embryos and whole seeds of cassava have been studied. A simple method is proposed for utilization in germplasm conservation or other related uses. Very high percentage survival values (ca. 97 percent) of zygotic embryos and whole seeds were ...


Marin, M.L.Mafla, G.Roca, William M.Withers, Lyndsey A.[Cryopreservation of cassava zygotic embryos and whole seeds in liquid nitrogen]Cryopreservation of cassava zygotic embryos and whole seeds in liquid nitrogen
Izquierdo, J.Roca, William M.[Under-utilized andean food crops: status and prospects of plant biotechnology for the conservation and sustainable agriculture use of genetic resources]Under-utilized andean food crops: status and prospects of plant biotechnology for the conservation and sustainable agriculture use of genetic resources
Martínez Racines, César PompilioTohme, Joseph M.López Gerena, J.Borrero Correa, Jaime C.McCouch, Susan R.Roca, William M.Châtel, M.Guimaraes, Elcio Perpétuo[Estado actual del mejoramiento del arroz mediante la utilización de especies silvestres de arroz en CIAT]Estado actual del mejoramiento del arroz mediante la utilización de especies silvestres de arroz en CIAT
Roca, William M.Szabados, LaszloMafla, G.Roa E, Julio CésarNolt, Barry L.[Virus elimination and clonal propagation of cassava (Manihot esculenta Crantz)]Virus elimination and clonal propagation of cassava (Manihot esculenta Crantz)

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