1. Perazzo, G., A. Panta, F. Rodríguez, R. Gómez, J. Toledo, Z. Huamán, M. Ghislain, A. Golmirzaie, and W. Roca. 2001. Clonal true-to-type verification of potato accessions retrieved from in vitro conservation and cryopreservation. In Scientists and Farmers. Partners in research for the 21st century. Program Report 1999-2000, p.175-183. International Potato Center, Lima, Peru.
2. Fregene, M., E. Okogbenin, C. Mba, F. Angel, M.C. Suárez, J. Gutiérrez, P. Chavarriaga, W. Roca, M. Bonierbale, and J. Tohme. 2001. Genome mapping in cassava improvement: Challenges, achievements and opportunities. Euphytica 120:159-165.
3. Sarria, R., Torres, E., Angel, F., Chavarriaga, P., and Roca, W. 1999. Transgenic plants of cassava (Manihot esculenta) with resistance to Basta obtained through Agrobacterium-mediated transformation. Plant Cell Reports 18 (in press).
4. Fajardo, D., Angel, F., Grum M. Tohme, J., Lobo M., Roca, W., and I. Sanchez. 1998. Genetic variation analysis of the genus Passiflora L. using RAPD markers. Euphytica 101:341-347.
5. Thro, A.M., Taylor, N., Raemakners, L., Visser, R., Pounti-Kaerlas, J., Schopke, C., Iglesias, C., Roca, W., Sampaio, M.J., Fauquet, C., and I. Patrykus. 1998. Maintaining the cassava biotechnology network: Nature Biotechnology 16:428-430.
6. Fregene, M.A., Ospina, J.A., and W. Roca. 1998. Recovery of cassava (Manihot esculenta Crantz) plants from immature zygotic embryos. Plant cell and orgn tissue culture 55(1):39-43.
7. Fregene, M.A., Bernal, A., Dixon, A., Roca, W.M., and Tohme, J.1998. AFLP analysis of African cassava (Manihot esculenta) germplasm resistant to the cassava mosaic disease (CMD). Theor and Appl Genet. (in press).
8. Thro, A.M., Roca, W., Henry, G., Iglesias, C., and S.Y.C. Ng. 1998. Contribution of in vitro biology to cassava, a small farmer’ crop. African J. Crop Sci. (accepted).
9. Escobar, R., Mafla, G., and W. Roca. 1997. A methodology for recovering cassava plants from shoot tips maintained in liquid nitrogen. Plant Cell Reports 16(7):474-478.
10. Fregene, M.A., Angel, F., Gomez, R., Rodriguez, F., Bonierbale M., Chavarriaga, P., Roca, W., and J. Tohme. A molecular genetic map of cassava. Theor. Appl. Genet. 95:431-441.
11. Sanchez, I., Angel, F., Grum, M., Tohme, J., Lobo, M., and W.M. Roca. 1997. Caracterización molecular, base sólida para el mejoramiento genético de passifloraceae Juss. Filotécnica Colombiana (in press).
12. Angel, F., Barney, V.E., Tohme, J., and W. Roca. 1996. Stability of cassava plants at the DNA level after retrieval from 10 years on in vitro storage. Euphytica 90(3):307-313.
13. Gomez, R., Angel F., Bonierbale, M., Rodriguez, M.W., Tohme, J. and W. Roca. 1996. Inheritance of random amplified polymorphic DNA markers in cassava (Manihot esculenta Cranzt) Genome 39:1039-1043.
14. Thro, A.M., Beachy, R.N., Bonierbale, M., Fauquet, C., Henry G., Henshaw, G.G., Hughes, M.A., Kawano, K., Roemarkers, C.J.J., Roca, W., Schopke, C., Taylor, N., and R.G.F. Visser. 1996. International research on biotechnology of cassava and its relevance to South East Asian economies. Asian J. Trop. Biol. 2:1-30.
15. Lentini, Z., Reyes, P., Martinez, C., and W. Roca. 1995. Androgenesis of highly recalcitrant rice genotypes with maltosa and silver nitrate. Plant Sci. 110-127-138.
16. Welsh, W., Bushunk, W., Roca, W., and S.P. Singh. 1995. Characterization of agronomic traits and markers of recombinant inbred lines from intra-and interracial populations of Phaseolus vulgaris L. Theor. Appl. Genet. 91:169-177.
17. Fregene, M.A., Vargas, J., Angel, F., Tohme, J., Asiedu, R.A., Akoroda, M.O., and W. Roca. 1994. Variability of chloroplast DNA and nuclear ribosomal DNA in cassava (Manihot esculenta crantz.) and its wild relatives. Theor. Appl. Genet. 89:719-727.
18. Mejía-Jiménez, Muñoz, C., Jacobsen, H.J. Roca, W.M.,, and S.P. Singh. 1994. Interspecific hybridization between common bean and tepary bean: Increased hybrid embryo growth, fertility, and efficiency of hybridization through recurrent and congruity backcrossing. Theor. Appl. Genetics 88:324-331.
19. Sarria, R., Calderón, A.,Thro, A.M., Torres E., Mayer, J., and W.M. Roca. 1994. Agrobacterium mediated transformation of Stylosanthes guianensis and production of transgenic plants. Plant Sci. 96:119-127.
20. Angel, F., Arias, D., Tohme, J., Iglesias, C., and W.M. Roca. 1993. Toward the construction of a molecular map of cassava (Manihot esculenta Crantz): comparison of restriction enzymes and probe sources in detecting RFLPs. Journal of Biotechnology. 31:103-113.
21. Roca, W.M., Henry, G., Angel F., and R. Sarria. 1992. Biotechnology research applied to cassava improvement at the International Center of Tropical Agriculture (CIAT). Ag Biotech News and Information, 4:303-308.
22. Roca, W.M. 1992. The role of biotechnology in Latin American Agriculture. Agro-Food-Industry Hi-Tech 3:46-47.
23. Marin, M.L., Mafla, G., Roca, W.M., and L.A. Withers. 1990. Cryopreservation of cassava zygotic embryos and whole seeds in liquid nitrogen. Cryo-letters 11:257-264.
24. Hussain, A., Bushuk, W., and W.M. Roca. 1989. Identification of cultivars of the forage legume Pueraria Phaseoloides by electrophoretic patterns of storage proteins. Euphytica 41:71-73.
25. Roca, W.M., Chaves, R., Marin, M.L., Arias, D.I., Mafla, G., and R. Reyes. 1989. In vitro methods of germplasm conservation Genome. 31(2):813-817.
26. Hussain, A., Espinel, M.T., Roca, W.M., and W. Bushuk. 1989. Acid PAGE procedure for detection of phaseolin in field beans (Phaseolus vulgaris L.) Euphytica 44:1-3.
27. Hussain, A., Ramirez, H., Roca, W.M., and W. Bushuk. 1988. Interaccesion variation of electrophoregrams of cotyledon proteins of field beans (Phaseolus vulgaris L.) Euphytica 39:109-111.
28. Hussain, A., Ramirez, H., Bushuk, W., and W.M. Roca. 1988. Identification of cultivars Stylosanthes capitatat Vog. by polyacrylamide gel electrophoresis of seed proteins. Euphytica 37:117-199.
29. Hussain, A., Ramirez, H., Roca, W.M., and W. Bushuk. 1988. Identification of cultivars of pasture legumes (Centrosema macrocarpum, C. pubescens and C.sp.n) by acid polyacrylamide gel electrophoresis of cotyledons storage proteins. Euphytica 39:105-107.
30. Szabados, L., Hoyos, R., and W.M. Roca. 1987. In vitro somatic embryogenesis and plant regeneration of cassava. Plant Cell Reports 6:248-251.
31. Hussain, A., Ramirez, H., Bushuk, W., and W.M. Roca. 1987. Identification of cassava (Manihot esculenta Crantz). Cultivars by electrophoretic patterns of esterase isozymes. Seed Sci. and Technol. 15:19-22.
32. Szabados, L., and W.R. Roca. 1986. Regeneration of isolated mesophyl and cell suspension protoplasts to plants in Stylosanthes guanensis. Plant Cell Reports 3:174-177.

Libros

1. Chavarriaga-Aguirre, P. and W. Roca. 2001. Transgenic plants of cassava obtained through Agrobacterium-mediated transformation. In Plant Genetic Engineering Vol 3: Improvement of Major Food Crops, P.K. Jaiwal, R.P. Singh, Eds., Sci-Tech Publishing Company, Houston, USA (In press).
2. Walker, T., M. Ghislain, A. Lagnaoui, W. Roca, and M. Palacios. 2001. Economic assessment of biotechnology at CIP with an emphasis on tissue culture techniques and the Bt potato. ISNAR Workshop paper (In press).
3. Lenti, Z., Martinez C., and W.M. Roca. 1996. Rice anther culture in germplasm development for Latin America and the Caribbean. A Handbook. CIAT, The Rockefeller Foundation, Foundation Polar. CIAT Press.
4. Roca, W.M., Mayer J.E., M.A. Pastor-Corrales, and J. Tohme (eds). 1994. Phaseolus beans advanced biotechnology research network (BARN), CIAT, Cali, Colombia. 431p.
5. Roca, W.M., and A.M. Thro. (eds). 1993. Proceedings of the First International Scientific meeting of the Cassava Biotechnology Network (CBN). Cartagena, Colombia. Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia. 496p.
6. Roca W., and L. Mroginski (eds). 1991. Cultivo de tejidos en la agricultura: Fundamentos y aplicaciones. CIAT, Cali-Colombia, p. xii, 970.

Publicaciones provenientes de Conferencias

1. Escobar, R.H., N.C. Manrique, D.G. Debouck, J. Tohme, and W. Roca. 2001. Cryopreservation of cassava shoot tips using the encapsulation-dehydration technique. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 59-09 (Abstract).
2. Espinoza, C. y W. Roca. 2001. Efecto de densidad de explantes y envases en el mantenimiento in vitro de Ipomoea batata para el manejo de bancos de germoplasma. REDBIO Conference, Goiania, Brazil (Poster).
3. Borda, Ch.C., J. Toledo, A. Golmirzaie, y W. Roca. 2001. Efecto de inductores de tuberización y fotoperíodo sobre la microtuberización de Solanum tuberosum L. in vitro. REDBIO Conference, Goiania, Brazil (Poster).
4. Montoya, J.E., R. Escobar, P. Chavarriaga, J. Tohme, and W. Roca. 2001. Optimizing plant regeneration systems from friable embryogenic callus using temporary immersion system. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 59-19 (Abstract).
5. Ceballos, H., M. Fregene, W. Roca, and J. Tohme. 2001. Cassava: an ideal crop for biotechnology tools. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 54-01 (Abstract).
6. Escobar, R.H., L. Muñoz, J. Tohme, and W. Roca. 2001. Rapid propagation of cassava planting material by temporary immersion bioreactors. CBN-V. Donald Danford Plant Science Center. St. Louis, Mo, U.S.A. p. 57-10 (Abstract).
7. Escobar, R.H., L.G. Santos, J. Tohme, and W. Roca. 2001. Cryopreservation of FEC lines as an aid for cassava genetic transformation programs. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 57-11 (Abstract).
8. Ladino, J.J., L.I. Mancilla, P. Chavarriaga, J. Tohme, and W. Roca. 2001. Transformation of cassava cv. TMS 60444 (MNig 11) with A. Tumefaciens carrying a cry/Ab gene for insect resistance. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 57-16 (Abstract).
9. López, D., P. Chavarriaga, J. Tohme, and W. Roca. 2001. Induction of friable embryogenic callus and plant regeneration in Colombia cassava commercial cultivars. CBN-V. Donald Danford Plant Science Center, St. Louis, Mo, U.S.A. p. 57-17 (Abstract).
10. Roca, W., Debouck, D., Escobar, R., Mafla G., and M. Fregene. 1998. Cryopreservtion and cassava germplasm conservation at CIAT. In: F. Engelmann and N. Takagi, (eds) Cryopreservation of tropical plant germplasm: Current research progress and applications. JIRCAS/IPGRI, Tsukuba, Japan (in press).
11. Roca, W., Correa-Victoria, F., Martinez, C., Tohme, J., Lentini, Z., and M. Levy. 1998. El desarrollo de una resistencia durable al añublo del arroz: consideraciones de productividad y ambientales. En (Komen, J., Falconi Hernández, eds). Transformación de las prioridades en programas viables. Seminario de política biotecnológica agrícola para América Latina, Perú. Oct. 1996. IBS/ISNAR, La Haya.
12. Thro, A.M., Fregene, M.A., Taylor, N., Rawmarkers, C.J., Pounti-Kaerlas J., Schopke, C., Visser R., Potrikus, I., Fauquet, C., Roca, W., and C. Hershey. 1998. Genetic biotechnologies and cassava-based development of marginal rural areas. In: T. Hohn and K. Leisinger (eds) gene and biotechnology of food crops in developing countries. Springe Wein, New York. Plant gene research: Basic Knowledge and applications (in press).
13. Fregene, M.A., Ospina, J.A., and W. Roca. 1998. Recovery of cassava (Manihot esculenta Crantz) plants from immature zygotic embryos. Plant Cell and Organ Tissue Culture (in press).
14. Fregene, M.A., Angel, F., Gomez, R., Rodriguez, F., Maya, M., Tohme, J. Iglesias C. and W.M. Roca. 1997. Elucidating genome organization in a putative allopolyploid (Manihot esculenta Crantz). Proc. Plant Genome, San Diego, CA.
15. Fregene, M.A., Angel, F., Gomez, R., Rodriguez, F., Maya, M.., Bonierbale, M., Tohme, J., Iglesias, C., and W.M. Roca. 1996. RFLP mapping of root quality traits in cassava. In Proc. With Symposium of the ISRTC, Malawi.
16. Thro, A.M., Roca, W.M., and G. Henry. 1996. The cassava Biotechnology Network and biotechnologies for processing quality of cassava. In Dufour, D., O’ Brien, G., and Best R. (eds). Cassava Flour and Starch: Progress in research and development international meeting, CIAT, Cali-Colombia.
17. Thro, A.M., Roca, W.M., and G. Henry, G. 1996. The cassava Biotechnology Network and cassava biotechnology research in Kurup F.T. et al (eds). Tropical Tube Crops: Problems prospects and future strategies. International Symposium on Tuber Crops, Trivandrum, India.
18. Fregene, M., Angel, F., Gomez, R., Rodriguez, F., Maya, M., Chavarriaga, P., Bonierbale, M., Iglesias C., Tohme, J., and W.M. Roca. 1996. Molecular genetic map of cassava (Manihot esculenta Cranzt) In Proc. 3° International Meeting, Cassava Biotechnology Network Kampala, Uganda, August 23-28 (in press).
19. Sarria, R., Torres, E., Angel, F., and W.M. Roca. 1996. Transgenic cassava. In: 3° International meeting, Cassava Biotechnology Network, Kampala, Uganda, August 22-28. (in press).
20. Escobar, R.H., and W.M. Roca. 1996. Cryopreservation of cassava shoot tips through rapid freezing, in 3° International meeting, Cassav Biotechnology Network, Kampala, Uganda, August 23-28. (in press).
21. Lentini, Z., Calvert, L., Tabares, E., Lozano, I., Ramirez, B., and W.M. Roca. 1996. Genetic transformation of rice with viral genes for novel resistance against rice hoja blanca virus. In: Khush, G.S. (ed) Rice Genetic III. IRRI, Manila, pp. 780-784.
22. Singh, S.P., Muñoz, C.G., Roca, W.M., and M. Pastor-Corrales. 1996. Breeding common bean for common bacterial blight resistance in the tropics, In: 1s Taller Internacional sobre bacteriosis comun del frijol. Documento 96/2 PROFRIJOL, pp. 24-36.
23. Thro, A.M., Bonierbale, M., Roca, W.M., Best, R., and G. Henry. 1995. Why, what, who and when: An overview of CBN and assessment cassava biotechnology research worldwide. In CBN (eds). Proc. II International Scientific meeting, Bogor, Indonesia.
24. Thro, A.M., Roca, W.M., and G. Henry. 1995. Le reseau sur la biotechnologie du manioc: son historie, ses objectifs, et ses recherches actualles. In T. Agbor Egbe, et al (eds). Transformation Alimentaire du Manioc. ORSTOM editions.
25. Thro, A.M., Roca, W.M., and R. Asiedu. 1994. The cassava Biotechnology Network and Opion agricultural research and development programs. In M.O. Akotoda (ed) Root crops for food security in Africa. Proc. International Soc. Tropical Root Crops-Africa Branch, Kampala, Uganda.
26. Escobar, R., Mafla, G., and W.M. Roca. 1993. Cryopreservation of cassava shoot tips. Proceedings, First Scientific Meeting of the Cassava Biotechnology Network, 25-28 Aug. 1992. Cartagena. Roca, W.M. and A.M. Thro (ed). CIAT. Cali, Colombia.
27. Angel, F., Giraldo, F., Gomez, R., Iglesias, C., Tohme, J., and W.M. Roca. 1993. Use of RFLPs and RAPDs in cassava genomic studies. In: Proceedings, First Scientific Meeting of the Cassava Biotechnology Network. W. Roca and A.M. Thro (eds). CIAT, Cali-Colombia.
28. Cataño, M.L., Mornan, K., Plazas, J., and W.M. Roca. 1993. Development of methodologies for the isolation and culture of cassava immature pollen and zygotic embryos. In: Proceedings, First Scientific Meeting of the Cassava Biotechnology Network. W. Roca and A.M. Thro (eds). CIAT. Cali-Colombia.
29. Kartha, K.K., and W.M. Roca. 1993. The role of plant biotechnology in crop improvement proceedings, First Scientific Meeting of the Cassava Biotechnology Network. W. Roca and A.M. Thro (eds). CIAT, Cali-Colombia.
30. Sarria, R., Gomez, A., Cataño, M., Herrera, P.V., Calderon, A., Mayer J.E. and W.M. Roca. 1993. Towards the development of Agrobacterium tumefaciens and particle bombardment-mediated cassava transformation. In: Proceedings First Scientific Meeting of the Cassava Biotechnology Network. W. Roca and A.M. Thro (eds). CIAT, Cali-Colombia.
31. Sarria, R., Ocampo, C.H., Ramirez, H., Hersehy, C., and W.M. Roca 1993. Genetics of esterase and glutamate ozaloacetate transaminase isozymes in cassava. In: Proceedings of the First International Scientific Meeting of the Cassava Biotechnology Network (CBN), Cartagena, Colombia 25-28 August 1992, W.M. Roca and A.M. Thro (eds). CIAT, Cali-Colombia. pp. 75-80.
32. Mafla, G., Roca, W.M., Reyes, R., Roa, J.C., Muñoz, L., Baca, A.E., and M. Iwanaga. 1992. In vitro management of cassava germplasm at CIAT. In: ‘Proceedings of first international scientific meeting of the cassava Biotechnology network’. Roca W.M., Thro A.M. (eds.), CIAT-Cali, Colombia. p. 168-174.
33. Roca, W.M., Angel, F., Sarria, R., and G. Mafla. 1992. Future initiatives in biotechnology research for tropical agriculture: the case of cassava. In: D.K. McCorwick, (ed.), Advances in Gene Technology: Feeding the World in the 21st Century, 1992 Miami Bio/technology/Winter Symposium, Miami, FL.
34. Marin, M.L., Mafla, G., Roca, W.M. and L.A. Withers. 1990. Conservation of cassava (Manihot esculenta Crantz): The role of cryopreservation. In: Proceedings of the VIIth International Congress on Plant Tissue and Cell Culture, Amsterdam, The Netherlands, 24-29 June 1990. pp. 371.
35. Roca, W.M., and B. Nolt. 1989. Tissue culture micropropagation and CIAT Biotechnology Research. In: J. Cohen (ed) Strengthening Collaboration in Biotechnology; International Agricultural Research and the Private Sector: AID, Washington, D.C. p. 77-92.
36. Miles, J.W., Roca, W.M., and E. Tabares. 1989. Assessment of somaclonal variation in Stylosanthes guianiensis, a tropical forage legume. In: Mujeeb-kazi, A., and L.A. Sith (eds), Review of Advanced in Plant Biotechnology, 1985-88: 2nd Int. Symp. On Genetic Manipulation in Crops. Mexico, D.F. and Manila, Philippines: CIMMYT and IRRI.