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Report 1984

Autor: Roca, William M. Rodríguez, J.A. Mafla, G. Roa E, J.C.

Guidelines are provided to acquaint the personnel of national programs and other collaborators with the procedures to recover, propagate, and transplant culture materials after their arrival. These include: (1) recovery of the cultures by direct potting of cassava plants after short trips; 1 wk. ...

Enlace original: https://cgspace.cgiar.org/handle/10568/71686

Investigación en Agricultura
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Roca, William M. ,  Rodríguez, J.A. ,  Mafla, G. ,  Roa E, J.C. ,  [Procedures for recovering cassava clones distributed in vitro] ,  Procedures for recovering cassava clones distributed in vitro
Report 1980

Autor: Roca, William M.

Plant tissue culture includes a wide range of techniques: protoplast, cell, anther, callus, meristem and organ culture, all having one common factor: the growth of vegetative material in an aseptic environment; i,e., the sterilized culture medium in test tubes. In spite of the fact that several o...

Enlace original: https://cgspace.cgiar.org/handle/10568/71800

Investigación en Agricultura
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Roca, William M. ,  [Cultivo de tejidos en yuca] ,  Cultivo de tejidos en yuca
Report 1981

Autor: Roca, William M.

Methods of vegetative reproduction are discussed using the results obtained with cassava and potato. Results of clone cleaning by heat therapy and in vitro meristem culture are given. Two methods for rapid cassava multiplication are proposed: by sprouts from cuttings and single leaf cuttings, whi...

Enlace original: https://cgspace.cgiar.org/handle/10568/71822

Investigación en Agricultura
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Roca, William M. ,  [Reproduccion vegetativa de materiales para la siembra libres de enfermedades] ,  Reproduccion vegetativa de materiales para la siembra libres de enfermedades
Manual 1979

Autor: Roca, William M.
Enlace original: https://cgspace.cgiar.org/handle/10568/54163

Investigación en Agricultura
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Roca, William M. ,  [Meristem culture in cassava: principles and methodology: principles and procedures] ,  Meristem culture in cassava: principles and methodology: principles and procedures
Book Chapter 1991

Autor: Roca, William M. Nolt, Barry L. Mafla, G. Roa E, J.C. Reyes, R.

Several techniques used to eliminate viruses from cassava are described, namely heat therapy, apical tissue culture, and micropropagation. Virological tests to index cassava viruses are also indicated as follows: ELISA, dsRNA, mechanical inoculation of leaf sap in plants on Chenopodium quinoa, an...

Enlace original: https://cgspace.cgiar.org/handle/10568/55095

Investigación en Agricultura
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Roca, William M. ,  Nolt, Barry L. ,  Mafla, G. ,  Roa E, J.C. ,  Reyes, R. ,  [Eliminacion de virus y propagacion de clones en la yuca (Manihot esculenta Crantz)] ,  Eliminacion de virus y propagacion de clones en la yuca (Manihot esculenta Crantz)

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