Cassava Genetic Improvement

Breeding Major Food Staples

Volumn , Issue , 2008, Pages 365-391

  Ceballos, Hernán ^a   Fregene, Martin ^a   Carlos, Juan Pérez ^a   Morante, Nelson ^a   Calle, Fernando ^a  

^a INTERNATIONAL CENTER FOR TROPICAL AGRICULTURE CIAT   (Colombia)

Author keywords

Cassava genetic improvement; Domestication; Human diet; Perennial shrub; Tropical countries

Indexed keywords

EID: 84891349424     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.1002/9780470376447.ch12     Document Type: Chapter

References (104)

1. Allem, A.C. 2002. The origins and taxonomy of cassava. In: Hillocks, R.J., Tresh, J.M. and Bellotti, A.C. (eds.). Cassava: Biology, production and utilization. CABI Publishing, pp. 1-16.
2. Alves, A.A.C. 2002. Cassava botany and physiology. In: Hillocks, R.J., Tresh, J.M. and Bellotti, A.C. (eds.). Cassava: Biology, production and utilization. CABI Publishing, pp. 67-89.
3. Andersen, M.D., Busk, P.K., Svendsen, I. and Møller, B.L. 2000. Cytochromes P-450 from cassava (Manihot esculenta Crantz) catalyzing the first steps in the biosynthesis of the cyanogenic glucosides linamarin and lotaustralin. The Journal of Biological Chemistry 275 (3): 1966-1975.
4. Asante, I.K. and Offei, S.K. 2003. RAPD-based genetic diversity study of fifty cassava (Manihot esculenta Crantz) genotypes. Euphytica 131: 113-119.
5. Balagopalan, C. 2002. Cassava utilization in food, feed and industry. In: Hillocks, R.J., Tresh, J.M. and Bellotti, A.C. (eds.). Cassava: Biology, production and utilization. CABI, Publishing, pp. 301-318.
6. Babu, L. and Chatterjee, S.R. 1999. Protein content and amino acid composition of cassava tubers and leaves. J. Root Crops 25 (20): 163-168.
7. Beeching, J.R., Yuanhuai, H., Gómez-Vázquez, R., Day, R.C. and Cooper, R.M. 1998. Wound and defense responses in cassava as related to postharvest physiological deterioration. In: Romeo, J. T., Downum, K.R. and Verpporte, R. (eds.) Recent advances in phytochemistry: Phytochemical signals in plant-microbe interactions. Plenum Press, New York and London. 32:231-248.
8. Bellotti, A.C. 2002. Arthropod pests. In: Hillocks, R.J., Thresh, J.M. and Bellotti, A.C. (eds.) Cassava: Biology, production and utilization. CABI Publishing, pp. 209-235.
9. Bellotti, A.C., Arias, V.B., Vargas, H.O., Reyes, Q.J.A. and Guerrero, J.M. 2002. Insectos y ácaros dañinos a la yuca y su control. In: Ospina, B. and Ceballos, H. (eds.) La yuca en el tercer milenio: Sistemas modernos de producción, procesamiento, utilización y comercialización. CIAT Publication No. 327. Apartado Aéreo 6713, Cali, Colombia, pp. 160-203.
10. Brim, C.A. and Cockerham, C.C. 1961. Inheritance of quantitative characters in soybeans. Crop Sci. 1: 187-190.
11. Busch, R.H., Janke, J.C., Frohberg, R.C. 1974. Evaluation of crosses among high and low yielding parents of spring wheat (Triticum aestivum L.) and bulk prediction of line performance. Crop Sci. 14:47-50.
12. Bueno, A. 1986. Avaliacão de cultivares de mandioca visando a seleção de progenitores para cruzamen-tos. R. Bras. Mand. 5 (1): 23-54.
13. Buitrago, A.J.A. 1990. La yuca en la alimentación animal. Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia, 446 p.
14. Cadavid López, L.F. and Gil Llanos, L. 2003. Investig-ación en producción de yuca forrajera en Colombia. Informe annual de Actividades CLAYUCA. Apdo Aéreo 6713, Cali Colombia, pp. 266-275.
15. Cach, N.T., Pérez, J.C., Lenis, J.I., Calle, F., Morante, N. and Ceballos, H. 2005a. Epistasis in the expression of relevant traits in cassava (Manihot esculenta Crantz) for subhumid conditions. Journal of Heredity 96 (5): 586-592.
16. Cach, N.T., Lenis, J.I., Pérez, J.C., Morante, N., Calle, F. and Ceballos, H. 2005b. Inheritance of relevant traits in cassava (Manihot esculenta Crantz) for sub-humid conditions. Plant Breeding 124: 1-6.
17. Calderón-Urrea, A. 1988. Transformation of Manihot esculenta (cassava) using Agrobactrium tumefa-ciens and expression of the introduced foreign genes in transformed cell lines. MSc thesis. Vrije University. Brussels. Belgium.
18. Calle, F., Pérez, J.C., Gaitán, W., Morante, N., Ceballos, H., Llano, G. and Alvarez, E. 2005. Diallel inheritance of relevant traits in cassava (Manihot esculenta Crantz) adapted to acid-soil savannas. Euphytica 144(1-2):177-186.
19. Carvalho, L.J.C.B., de Souza, C.R.B., Cascardo, J.C.M., Junior, C.B. and Campos, L. 2004. Identification and characterization of a novel cassava (Manihot esculenta Crantz) clone with high free sugar content and novel starch. Plant Molecular Biology 56: 643-659.
20. Ceballos, H., Fregene, M., Lentini, Z., Sánchez, T., Puentes, Y.I., Pérez, J.C., Rosero, A. and Tofiño, A.P. 2006. Development and Identification of High-Value Cassava Clones. Acta Horticulturae (in press).
21. Ceballos, H., Iglesias, C.A., Pérez, J.C. and Dixon, A.G.O. 2004. Cassava breeding: Opportunities and challenges. Plant Molecular Biology 56: 503-515.
22. Ceballos, H., Pandey, S., Narro, L. and Pérez, J.C. 1998. Additive, dominance, and epistatic effects for maize grain yield in acid and non-acid soils. Theor. Appl. Genet. 96: 662-668.
23. Ceballos, H., Sánchez, T., Chávez, A.L., Iglesias, C., Debouck, D., Mafla, G. and Tohme, J. 2006. Variation in crude protein content in cassava (Manihot esculenta Crantz) roots. J. Sci. Food Agric. (in press).
24. Chavarriaga, P., Prieto, S., Herrera, C.J., López, D., Bellotti, A. and Tohme, J. 2004. Screening trans-genics unveils apparent resistance to hornworm (E. ello) in the non-transgenic, African cassava clone 60444. In: Alves and Tohme (eds.) Adding value to a small-farmer crop: Proceedings of the Sixth International Scientific Meeting of the Cassava Biotechnology Network. 8-14 March 2004, CIAT, Cali Colombia. Book of Abstracts pp. 4.
25. Chávez, A.L., Sánchez, T., Jaramillo, G., Bedoya, J.M., Echeverry, J., Bolaños, E.A., Ceballos, H. and Iglesias, C.A. 2005. Variation of quality traits in cassava roots evaluated in landraces and improved clones. Euphytica 143: 125-133.
26. Chávez, A.L., Bedoya, J.M., Sánchez, T., Iglesias, C.A., Ceballos, H. and Roca, W. 2000. Iron, carotene, and ascorbic acid in cassava roots and leaves. Food and Nutrition Bulletin. 21: 410-413.
27. CIAT (Centro Internacional de Agricultura Tropical), 2002. Project IP3, Improved Cassava for the Developing World, Annual Report 2002. Apdo Aéreo 6713, Cali, Colombia.
28. CIAT (Centro Internacional de Agricultura Tropical), 2001. Project IP3, Improved Cassava for the Developing World, Annual Report 2001. Apdo Aéreo 6713, Cali, Colombia.
29. Cock, J. 1985. Cassava: New potential for a neglected Crop. Westview Press. Boulder, CO., USA, 240 pp.
30. Comstock, R.E., Kelleher, T. and Morrow, E.B. 1958. Genetic variation in an asexual species: The garden strawberry. Genetics 43: 634-646.
31. DeVries, J. and Toenniessen, G. 2001. Securing the harvest: Biotechnology, breeding and seed systems for African crops. CABI Publishing Oxon, UK and New York, USA, pp. 147-156.
32. Dixon, A.G.O., Asiedu, R. and Bokanga, M. 1994. Breeding of cassava for low cyanogenic potential: Problems, progress and perspectives. Acta Horticul-turae 375: 153-161.
33. Du, L., Bokanga, M., Møller, B.L. and Halkier, B.A. 1995. The biosynthesis of cyanogenic glucosides in roots of cassava. Phytochemistry 39 (2): 323-326.
34. Easwari Amma, C.S. and Sheela, M.N. 1998. Genetic analysis in a diallel cross of inbred lines of cassava. Madras Agric. J. 85: 264-268.
35. Easwari Amma, C.S. and Sheela, M.N. 1995. Combining ability, heterosis and gene action for three major quality traits in cassava. J. Root Crops 21: 24-29.
36. Easwari Amma, C.S. and Sheela, M.N. 1993. Heterosis in cassava: Nature and magnitude. Proc. Tropical Tuber Crops Problems, Prospects and Future Strategies, ISRC, Trivandrum, India. 6-9 November, pp. 88-94.
37. Easwari Amma, C.S., Sheela, M.N. and Thankamma Pillai, P.K. 1995. Combining ability analysis in cassava. J. Root Crops 21: 65-71.
38. Elias, M., Mühlen, G.S., McKey, D., Roa, A.C. and Tohme, J. 2004. Genetic diversity of traditional South American landraces of cassava (Manihot esculenta Crantz):An analysis using micros atel-lites. Economic Botany 58: 242-256.
39. Elias, M., McKey, D., Panaud, O., Anstett, M.C. and Robert, T. 2001a. Traditional management of cassava morphological and genetic diversity by the Makushi Amerindians (Guyana, South America):Perspectives for on-farm conservation of crop genetic resources. Euphytica 120: 143-157.
40. Elias, M., Penet, L., Vindry, P., McKey, D., Panaud, O. and Robert, T. 2001b. Unmanaged sexual reproduction and the dynamics of genetic diversity of a vegetatively propagated crop plant: Cassava (Manihot esculenta Crantz) in a traditional farming system. Molecular Ecology 10: 1895-1907.
41. Ellis, R.H., Hong, T.D. and Roberts, E.H. 1982. An investigation of the influence of constant and alternating temperature on the germination of cassava seed using a two-dimentional temperature gradient plate. Annals of Botany 49: 241-246.
42. Eta-Ndu, J.T., Openshaw, S.J. 1999. Epistasis for grain yield in two F2 populations of maize. Crop Sci. 39: 346-352.
43. Foster, G.S. and Shaw, D.V. 1988. Using clonal replicates to explore genetic variation in a perennial plant species. Theor. Appl. Genet. 76: 788-794.
44. Fregene, M., Okogbenin, E., Marin, J., Moreno, I., Ariyo, O., Akinwale, O., Barrera, E., Ceballos, H. and Dixon, A. 2006. Molecular Marker-assisted Selection (MAS) of resistance to the cassava mosaic disease (CMD). Theor. Appl. Genet. (in press).
45. Fregene, M. and Puonti-Kaerlas, J. 2002. Cassava biotechnology. In: Hillocks, R.J., Thresh, J.M. and Bellotti, A.C. (eds.), Cassava: Biology, production and utilization. CABI Publishing, pp. 179-207.
46. Fregene, M., Bernal, A., Duque, M., Dixon, A. and Tohme, J. 2000. AFLP analysis of African cassava (Manihot esculenta Crantz) germplasm resistant to the cassava mosaic disease (CMD). Theor. Appl. Genet. 100: 678-685.
47. Fregene, M., Angel, F., Gomez, R., Rodriguez, F., Chavarriaga, P., Roca, W. and Tohme, J. 1997. A molecular genetic map of cassava (escu- lenta Crantz). Theor. Appl. Genet. 95: 431-441.
48. Frisch, M., Bohn, M. and Melchinger, A.E. 1999. Comparison of Seletion Strategies for Marker-Assisted Backcrossing of a Gene. Crop Sci. 39: 1295-1301.
49. Gardner, C.O. 1961. An evaluation of effects of mass selection and seed irradiation with thermal neutrons on yields of corn. Crop Sci. 1: 241-245.
50. Gomez, G., Santos, J. and Valdivieso, M. 1983. Uti-lización de raíces y productos de yuca en aliment-ación animal. In: Domínguez, C.E. (ed.) Yuca: Investigación, producción y utilización. Working Document No. 50. Centro Internacional de Agricul-tura Tropical (CIAT), Cali, Colombia.
51. Gonçalvez Fukuda, W.M. and Saad, N. 2001. Participatory research in cassava breeding with farmers in Northeastern Brazil. Document CNPMF No. 99. EMBRAPA, Cruz das Almas. Bahia, Brazil.
52. Gonçalvez Fukuda, W.M., Fukuda, C., Leite Cardoso, C.E., Lima Vanconcelos, O. and Nunes, L.C. 2000. Implantação e evolução dos trabalhos de pesquisa participativa em melhoramento de mandioca no nordeste Brasileiro. Documento CNPMF No. 92. EMBRAPA, Cruz das Almas. Bahia, Brazil.
53. Hahn, S.K., Terry, E.R., Leuschner, K., Akobundu, I.O., Okali, C. and Lal, R. 1979. Cassava improvement in Africa. Field Crops Research 2: 193-226.
54. Hahn, S.K., Terry, E.R. and Leuschner, K. 1980a. Breeding cassava for resistance to cassava mosaic disease. Euphytica 29: 673-683.
55. Hahn, S.K., Howland, A.K. and Terry, E.R. 1980b. Correlated resistance of cassava to mosaic and bacterial blight diseases. Euphytica 29: 305-311.
56. Hallauer, A.R. and Miranda Fo, J.B. 1988. Quantitative Genetics in Maize Breeding. Second Edition. Iowa State University Press. USA, pp. 45-114.
57. Hanson, W.D. and Weber, C.R. 1961. Resolution of genetic variability in self-pollinated species with an application to the soybean. Genetics 46: 1425-1434.
58. th Symposium of the International Society for Tropical Root Crops. Lima, Peru. 20-25 February, 1983.
59. Hillocks, R.J. and Wydra, K. 2002. Bacterial, fungal and nematode diseases. In: Hillocks, R.J., Thresh, J.M. and Bellotti, A.C. (eds.), Cassava: Biology, production and utilization. CABI Publishing, pp. 261-280.
60. Hospital, F., Chevalet, C. and Mulsant, P. 1992. Using markers in gene introgression breeding programs. Genetics 132: 1119-1210.
61. Iglesias, C.A., Mayer, J., Chávez, A.L. and Calle, F. 1997. Genetic potential and stability of carotene content in cassava roots. Euphytica 94: 367-373.
62. Iglesias, C.A. and Hershey, C. 1994. Cassava breeding at CIAT: Heritability estimates and genetic progress in the 1980s In: Ofori, F. and Hahn, S.K. (eds.) Tropical root crops in a developing economy. ISTRC/ISHS, Wageningen, Netherlands, pp. 149-163.
63. Iglesias, C.A., Hershey, C., Calle, F. and Bolaños, A. 1994. Propagating cassava (Manihot esculenta Crantz) by sexual seed. Exp. Agric. 30:283-290.
64. Jaramillo, G., Morante, N., Pérez, J.C., Calle, F., Cebal-los, H., Arias, B. and Bellotti, A.C. 2005. Diallel analysis in cassava adapted to the midaltitude valleys environment. Crop Sci. 45: 1058-1063.
65. Jennings, D.L. and Iglesias, C.A. 2002. Breeding for crop improvement. In: Hillocks, R.J., Thresh, J.M. and Bellotti, A.C. (eds.) Cassava: Biology, production and utilization. CABI Publishing, pp. 149-166.
66. Kawano, K. 1980. Cassava. In: Fehr, W.R. and Hadley, H.H. (eds.) Hybridization of crop plants. ASA, CSSA. Madison, Wisconsin, pp. 225-233.
67. Kawano, K. 2003. Thirty years of cassava breeding for productivity-biological and social factors for success. Crop Sci. 43: 1325-1335.
68. Kawano, K., Daza, P., Amaya, A., Ríos, M. and Gonçalvez, M.F. 1978. Evaluation of cassava germplasm for productivity. Crop Sci. 18: 377-380.
69. Kawano, K., Narintaraporn, K., Narintaraporn, P., Sarakarn, S., Limsila, A., Limsila, J., Suparhan, D., Sarawat, V. and Watananonta, W. 1998. Yield improvement in a multistage breeding program for cassava. Crop Sci 38 (2): 325-332.
70. Ladino, J., Mancilla, L.I., Chavarriaga, P., Tohme, J. and Roca, W.M. 2001. Transformation of cassava cv. TMS60444 with A. tumefaciens carrying a cry 1Ab gene for insect resistance. Proceeding of the Fifth International Scientific Meeting of the Cassava Biotechnology Network, Donald Danforth Plant Science Center. St. Louis, Missouri, USA. November 4-9, 2001.
71. Lamkey, K.R., Schnicker, B.J. and Melchinger, A.E. 1995. Epistasis in an elite maize hybrid and choice of generation for inbred line development. Crop Sci. 35: 1272-1281.
72. Lenis, J.I., Calle, F., Jaramillo, G., Pérez, J.C., Ceballos, H. and Cock, J. 2006. Leaf retention and cassava productivity. Field Crops Res. 95(2-3):126-134.
73. Magoon, M.L., Krishnan, R. and Vijaya Bai, K. 1969. Morphology of the pachytene chromosomes and meiosis in Manihot esculenta Crantz. Cytologia 34: 612-625.
74. Mba, R.E.C., Stephenson, P., Edwards, K., Melzer, S., Mkumbira, J., Gullberg, U., Apel, K., Gale, M., Tohme, J. and Fregene, M. 2001. Simple sequence repeat (SSR) markers survey of the cassava (Manihot esculenta Crantz) genome: Towards an SSR-based molecular genetic map of cassava. Theor. Appl. Genet. 102: 21-31.
75. McCallum, C.M., Comai, L., Greene, E.A. and Henikoff, S. 2000. Targeting induced local lesions in genomes (TILLING) for plant functional genomics. Plant Physiol. 123: 439-442.
76. McMahon, J.M., White, W.L.B. and Sayre, R.T. 1995. Cyanogenesis in cassava (Manihot esculenta Crantz). Journal of Experimental Botany 46: 731-741.
77. Melchinger, A.E., Geiger, H.H. and Schnell, F.W. 1986. Epistasis in maize (Zea mays L.). 2. Genetic effects in crosses among early flint and dent inbred lines determined by three methods. Theor. Appl. Genet. 72:231-239.
78. Meuwissen, T.H.E., Hayes, B.J. and Goddard, M.E. 2001. Prediction of Total Genetic Value Using Genome-Wide Dense Marker Maps. Genetics 157: 1819-1829.
79. Mullin, T.J. and Park, Y.S. 1992. Estimating genetic gains from alternative breeding stratregies for clonal forestry. Can. J. For. Res. 22: 14-23.
80. Nyiira, Z.M. 1975. Advances in research on the economic significance of the green cassava mite Mononychellus tanajoa Bondar in Uganda. International exchange and testing of cassava germplasm in Africa. In: Terry, E.R. and MacIntyre, R. (eds.) Proceedings of an interdisciplinary workshop. Ibadan, Nigeria, 17-21 November, 1975. IDRC-063e, Ottawa, Canada, pp. 22-29.
81. Orf, J.H., Chase, K., Adler, F.R., Mansur, L.M. and Lark, K.G. 1999. Genetics of soybean agronomic traits: II. Interactions between yield quantitative trait loci in soybean. Crop Sci. 39: 1652-1657.
82. Pandey, S. and Gardner, C.O. 1992. Recurrent selection for population, variety and hybrid improvement in tropical maize. Advances in Agronomy 48:187.
83. Pérez, J.C., Ceballos, H., Jaramillo, G., Morante, N., Calle, F., Arias, B. and Bellotti, A.C. 2005a. Epis-tasis in cassava adapted to mid-altitude valley environments. Crop Sci. 45: 1491-1496.
84. Pérez, J.C., Ceballos, H., Calle, F., Morante, N., Gaitán, W., Llano, G. and Alvarez, E. 2005b. Within-family genetic variation and epistasis in cassava (Manihot esculenta Crantz) adapted to the acid-soils environment. Euphytica 145 (1-2):77-85.
85. Peroni, N. and Hanazaki, N. 2002. Current and lost diversity of cultivated varieties, especially cassava, under swidden cultivation systems in the Brazilian Atlantic Forest. Agriculture, Ecosystems and Environment 92: 171-183.
86. Pixley, K.V. and Frey, K.J. 1991. Combining ability for test weight and agronomic traits of oat. Crop Sci. 31: 1448-1451.
87. Puonti-Kaerlas, J., Li, H.Q., Sautter, C. and Potrykus, I. 1997. Production of transgenic cassava (Manihot esculenta Crantz) via organogenesis and Agrobacteruim-mediated transformation. African Journal of Root and Tuber Crops 2: 181-186.
88. Rajendran, P.G., Ravindran, C.S., Nair, S.G. and Nayar, T.V.R. 2000. True cassava seeds (TCS) for rapid spread of the crop in non-traditional areas. Central Tuber Crops Research Institute (Indian Council of Agricultural Research). Thiruvananthapuram, 695 017, Kerala, India.
89. Rönnberg-Wästljung, A.C. and Gullberg, U. 1999. Genetics of breeding characters with possible effects on biomass production in Salix viminalis (L.). Theor. Appl. Genet. 98:531-540.
90. Rönnberg-Wästljung, A.C., Gullberg, U. and Nilsson, C. 1994. Genetic parameters of growth characters in Salix viminalis grown in Sweden. Can. J. For. Res. 24: 1960-1969.
91. Sambatti, J.B.M., Martins, P.S. and Ando, A. 2001. Folk taxonomy and evolutionary dynamics of cassava: A case study in Ubatuba, Brazil. Economic Botany 55: 93-105.
92. Sánchez, T., Chávez, A.L., Ceballos, H., Rodriguez-Amaya, D., Nestel, P. and Ishitani, M. 2006. Reduction or delay of post-harvest physiological deterioration in cassava roots with higher carot-enoid content. Journal of the Science of Food and Agriculture 86 (4): 634-639.
93. st centruy. Trends, projections, and policy options. International Food Policy Research Institute (IFPRI)/Centro Inter-nacional de la papa (CIP). Wasington, USA, 64 p.
94. Scotti, C., Pupilli, F., Salvi, S. and Arcioni, S. 2000. Variation in Vigot and in RFLP-estimated heterozygosity by selfing tetraploid alfalfa: New perspectives for the use of selfing in alfalfa breeding. Theor. Appl. Genet. 101: 120-125.
95. Stam, P. and Zeven, A.C. 1981. The theoretical proportion of donor genome in near-isogenic lines of selffertilizers bred by backcrossing. Euphytica 30: 227-238.
96. Stonecypher, R.W. and McCullough, R.B. 1986. Estimates of additive and non-additive genetic variance from a cloneal diallel of Douglas-fir Pseudotsuga menziesii (Mirb.) Franco. In: Proc. Int. Union for Res. Org., Joint Mtg. Working Parties Breed Theor., Prog. Test, Seed Orch. Williamsburg, VA. Publ by NCSU-Industry Coop Tree Imp. Pgm., pp. 211-227.
97. Taylor, N., Cavarriaga, P., Raemakers, K., Siritunga, D. and Zhang, P. 2004. Development and application of transgenic technologies in cassava. Plant Molecular Biology 56: 671-688.
98. Tewe, O. 2004. Cassava for livestock feed in Sub-Saharan Africa. The Global Cassava Development Strategy. NeBambi, L. (Coordinator). Food and Agriculture Organization of the United Nations (FAO), Rome, Italy.
99. Umanah, E.E. and Hartmann, R.W. 1973. Chromosome numbers and karyotypes of some Manihot species. J. Amer. Soc. Hort. Sci. 8 (3): 272-274.
100. Wheatley, C.C. and Chuzel, G. 1995. Cassava: The nature of the tuber and use as a raw material. In: Macrae, R., Robinson, R.K. and Sadler, M.J. (eds.) Encyclopaedia of Food Science, Food Technology and Nutrition. Academic Press, San Diego, California, pp. 734-743.
101. Wheatley, C.C., Sanchez, T. and Orrego, J.J. 1993. Quality evaluation of the core cassava collection at CIAT. In: Roca, W.M. and Thro, A.M. (eds.) Proc. of the First Intl. Scientific Meeting of the Cassava Biotechnology Network, Cartagena, Colombia, August 1992. CIAT, Cali, Colombia, pp. 255-264.
102. Wolf, D.P. and Hallauer, A.R. 1997. Triple test cross analysis to detect epistasis in maize. Crop Sci. 37: 763-770.
103. Wright, C.E. 1965. Field plans for a systematically designed polycross. Record of Agricultural Research 14: 31-41.
104. Zaldivar, M.E., Rocha, O.J., Aguilar, G., Castro, L., Castro, E. and Barrantes, R. 2004. Genetic variation of cassava (Manihot esculenta Crantz) cultivated by Chibchan Amerindians of Costa Rica. Economic Botany 58: 204-213.