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The Domestication and Early Spread of Manioc (Manihot Esculenta Crantz): A Brief Synthesis

Published online by Cambridge University Press:  20 January 2017

Christian Isendahl
Christian Isendahl*
Affiliation:
Department of Archaeology and Ancient History, Uppsala University, Box 626, SE-751 26 Uppsala, Sweden (christian.isendahl@arkeologi.uu.se)
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Abstract

Owing to poor preservation of organic remains in humid environments, direct evidence of early manioc (Manihot esculenta Crantz) cultivation is exceptionally rare in datable archaeological contexts. Recent research summarized here offers new insights into the spatio-temporal framework of the initial domestication and early spread of manioc in the Neotropics. Integrating evidence from comparative plant genetics and paleoethnobotanic starch analysis to contribute to the archaeology of manioc origins, this review finds that (1) the strongest candidate for the botanical origin of domesticated manioc—the wild progenitor of the root crop—is the species Manihot esculenta subspecies flabellifolia (Pohl) Ciferri; (2) the geographical origin of manioc—the biome in which the progenitor evolved—is most likely in the savannas, the Brazilian Cerrado, to the south of the Amazon rainforest; (3) the Cerrado is also, in our best estimate, the region of agricultural origin of initial cultivation; (4) domesticated manioc had spread from the agricultural origin by the early Holocene, possibly as early as 10,000 years ago, but certainly by 7000 B.C.; and (5) domesticated manioc was a readily available plant in most habitats of the Neotropics by the mid-Holocene, at least some 6500 years ago.

Resumen

Resumen

Debido a las condiciones desfavorables para la conservación de restos orgánicos en climas tropicales, la evidencia directa para sustentar el cultivo de mandioca (Manihot esculenta Crantz) es todavía extremadamente escasa en contextos arqueológicos fechables. Investigaciones recientes resumidas en el presente trabajo ofrecen nuevos enfoques para el marco espacial-temporal de la domesticación inicial y difusión temprana de mandioca en las tierras neo-tropicales. Integrando evidencias de la genética comparativa de plantas y los análisis de almidones paleoetnobotánicos para contribuir a los orígenes arqueológicos de la mandioca, esta revisión de la literatura encuentra lo siguiente: (1) el candidato principal para hallar el origen botánico de la mandioca doméstica—la progenitora silvestre de esta raíz—es la especie Manihot esculenta con subespecie flabellifolia (Pohl) Ciferri; (2) el origen geográfico de la mandioca—la comunidad biótica en donde evolucionó—es probablemente en las sabanas del Cerrado brasileño hacia el sur de los bosques tropicales de la Amazonía; (3) el cerrado brasileño es también la región del origen agrícola del cultivo inicial; (4) la mandioca domesticada se difundió a partir de sus orígenes agrícolas desde el periodo Holoceno Temprano, posiblemente en épocas tan tempranas como hace 10,000 años; y (5) la mandioca domesticada era una planta ampliamente disponible en casi todas las comunidades ambientales neo-tropicales durante el Holoceno Medio, por lo menos desde 6,500 años atrás.

Type
Articles
Information
Latin American Antiquity , Volume 22 , Issue 4 , December 2011 , pp. 452 - 468
Copyright
Copyright ©2011 by the Society for American Archaeology.

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References

References Cited

Allem, Antonio C. 1999 The Closest Wild Relatives of Cassava (Manihot esculenta Crantz). Euphytica 107:123–133.Google Scholar
Allem, Antonio C. 2002 The Origins and Taxonomy of Cassava. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 1–16. CABI, Wallingford and New York. Google Scholar
Alves, Alfredo A. C. 2002 Cassava Botany and Physiology. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 67–89. CABI, Wallingford and New York. Google Scholar
Babot, María del Pilar 2003 Starch Grain Damage as an Indicator of Food Processing. In Phytolith and Starch Research in the Australia-Pacific-Asian Regions: The State of the Art, edited by Diane M. Hart and Lynley A. Wallis, pp. 69–81. Pandanus Books, Canberra. Google Scholar
Babot, María del Pilar 2005 Tecnología y utilizatión de artefactos de molienda en el noroeste prehispánico. Unpublished Ph.D. dissertation, Facultad de Ciencias Naturales e Instituto M. Lillo, Universidad Nacional de Tucumán, Argentina.Google Scholar
Balée, William L., and Erickson, Clark L. (editors) 2006 Time and Complexity in Historical Ecology: Studies in the Neotropical Lowlands. Columbia University Press, New York.CrossRefGoogle Scholar
Balyejusa Kizito, Elizabeth, Chiwona-Karltun, Linley, Egwang, Thomas, Fregene, Martin, and Westerbergh, Anna 2007 Genetic Diversity and variety Composition of Cassava on Small-Scale Farms in Uganda: An Interdisciplinary Study Using Genetic Markers and Farmer Interviews. Genetica 130:301–318.Google Scholar
Beeching, John R., Marmey, Philippe, Gavalda, Marie-Christine, Noirot, Michel, Haysom, Howard R., Hughes, Monica A., and Charrier, Andre 1993 An Assessment of Genetic Diversity within a Collection of Cassava (Manihot esculenta Crantz) Germplasm Using Molecular Markers. Annals of Botany 72:515–520.CrossRefGoogle Scholar
Bellotti, Anthony C. 2002 Arthropod Pests. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 209–235. CABI, Wallingford and New York. Google Scholar
Brown, Michael F. 1986 Tsewa's Gift: Magic and Meaning in an Amazonian Society. Smithsonian Institution Press, Washington, D.C.Google Scholar
Bryant, Vaughn M. 2003 Invisible Clues to New World Plant Domestication. Science 299:1029–1030.Google Scholar
Canti, Matthew G. 2003 Comments on “Calcite Crystals Inside Archaeological Plant Tissues” by Freitas and Martins. Journal of Archaeological Science 30:1209–1210.Google Scholar
Carneiro, Robert L. 2000 The Evolution of the Tipití: A Study in the Process of Invention. In Cultural Evolution: Contemporary Viewpoints, edited by Gary M. Feinman and Linda Manzanilla, pp. 61–93. Kluwer Academic, New York. Google Scholar
Carvalho, Luiz J. C. B., and Schaal, Barbara A. 2001 Assessing Genetic Diversity in the Cassava (Manihot esculenta Crantz) Germplasm Collection in Brazil Using PCR-based Markers. Euphytica 120:133–142.Google Scholar
Castillo, Neyla, and Aceituno, Francisco J. 2006 El bosque domesticado, el bosque cultivado: un proceso milenario en el Valle Medio del Río Porce en el noroccidente colombiano. Latin American Antiquity 17:561–578.Google Scholar
Chandler-Ezell, Karol, Pearsall, Deborah M., and Zeidler, James A. 2006 Root and Tuber Phytoliths and Starch Grains Document Manioc (Manihot esculenta), Arrowroot (Maranta arundinacea), and Llerén (Calathea sp.) at the Real Alto Site, Ecuador. Economic Botany 60:103–120.Google Scholar
Clement, Charles, R., Cristo-Araújo, Michelly de, d'Eeckenbrugge, Geo Coppens,Pereira, Alessandro Alves, and Picanco-Rodrigues, Doriante 2010 Origin and Domestication of Native American Crops. Diversity 2:72–106.Google Scholar
Cock, James H. 1982 Cassava: A Basic Energy Source in the Tropics. Science 218: 755–762.Google Scholar
Dickau, Ruth, Ranere, Anthony J., and Cooke, Richard G. 2007 Starch Grain Evidence for the Preceramic Dispersals of Maize and Root Crops into Tropical Dry and Humid Forests of Panama. Proceedings of the National Academy of Sciences 104:3651–3656.CrossRefGoogle ScholarPubMed
Dillehay, Tom D., Rossen, Jack, Andres, Thomas C., and Williams, David E. 2007 Preceramic Adoption of Peanut, Squash, and Cotton in Northern Peru. Science 316:1890–1893.Google Scholar
Duncan, Neil A., Pearsall, Deborah M., and Benfer, Robert A. Jr. 2009 Gourd and Squash Artifacts Yield Starch Grains of Feasting Foods from Preceramic Peru. Proceedings of the National Academy of Sciences 106:13202–13206.CrossRefGoogle ScholarPubMed
Elias, Marianne, Miihlen, Gilda Santos, McKey, Doyle, Roa, Ana Carolina, and Tohme, Joe 2004 Genetic Diversity of Traditional South American Landraces of Cassava (Manihot esculenta Crantz): An Analysis Using Microsatellites. Economic Botany 58:242–256.CrossRefGoogle Scholar
Elias, Marianne, Penet, Laurent, Vindry, P., McKey, Doyle, Panaud, Olivier, and Robert, Thierry 2001 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.Google Scholar
FAO 2003 Food Outlook No. 3. Electronic document, http://www.fao.org/DOCREP/005/Y9643E/y9643e11.htm, accessed July 23, 2004.Google Scholar
Fregene, Martin, and Puonti-Kaerlas, Johanna 2002 Cassava Biotechnology. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 179–207. CABI, Wallingford and New York. Google Scholar
Freitas, Fábio O., and Martins, Paulo S. 2000 FOCUS: Calcite Crystals Inside Archaeological Plant Tissues. Journal of Archaeological Science 27:981–985.CrossRefGoogle Scholar
Gade, Daniel W. 2003 Names for Manihot esculenta: Geographical Variation and Lexical Clarification. Journal of Latin American Geographers 1:43–57.Google Scholar
Goldstein, David J. 2010 Along Annual Lines: Considering the Social Roles of Annual and Perennial Components of Agroecosystems in the Development of Social Complexity. In From Field to Table: The Historical Ecology of Regional Subsistence Strategies, edited by David J. Goldstein. The University of South Carolina Press, Columbia, in press.Google Scholar
Hart, Diane M., and Wallis, Lynley A. (editors) 2003 Phytolith and Starch Research in the Australia-Pacific-Asian Regions: The State of the Art. Pandanus Books, Canberra.Google Scholar
Hawkes, John G. 1989 The domestication of roots and tubers in the American tropics. In Foraging and Farming: The Evolution of Plant Exploitation, edited by David R. Harris and Gordon C. Hillman, pp. 481–503. Unwin Hyman, London. Google Scholar
Heckenberger, Michael J. 1998 Manioc Agriculture and Sedentism in Amazonia: The Upper Xingu Example. Antiquity 72:633–648.Google Scholar
Henry, Guy, and Hershey, Clair 2002 Cassava in South America and the Caribbean. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 17–40. CABI, Wallingford and New York. Google Scholar
Howeler, Reinhardt H. 2002 Cassava Mineral Nutrition and Fertilization. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 115–147. CABI, Wallingford and New York. Google Scholar
Isendahl, Christian 2002 Common Knowledge: Lowland Maya Urban Farming at Xuch. Uppsala University, Uppsala, Sweden.Google Scholar
Lathrap, Donald W. 1970 The Upper Amazon. Thames and Hudson, London.Google Scholar
Lathrap, Donald W. 1973 The Antiquity and Importance of Long-distance Trade Relationships in the Moist Tropics of Pre-Columbian South America. World Archaeology 5:170–186.Google Scholar
Lathrap, Donald W. 1977 Our Father the Cayman, Our Mother the Gourd: Spinden Revisited, or a Unitary Model for the Emergence of Agriculture in the New World. In Origins of Agriculture, edited by Charles A. Reed, pp. 713–751. Mouton, The Hague. Google Scholar
Leihner, Dietrich 2002 Agronomy and Cropping Systems. In Cassava: Biology, Production, and Utilization, edited by Rory J. Hillocks, Michael Thresh, and Anthony C. Bellotti, pp. 91–113. CABI, Wallingford and New York. Google Scholar
Lentz, David L. 1999 Plant Resources of the Ancient Maya: The Paleoethnobotanicai Evidence. In Reconstructing Ancient Maya Diet, edited by Christine D. White, pp. 3–18. University of Utah Press, Salt Lake City. Google Scholar
Léotard, Guillaume, Duputié, Anne, Kjellberg, Finn, Douzery, Emmanuel J.P., Debain, Chantal, Granville, Jean-Jacques de, and McKey, Doyle 2009 Phylogeography and the Origin of Cassava: New Insights from the Northern Rim of the Amazonian Basin. Molecular Phylogenetics and Evolution 53:329–334.CrossRefGoogle ScholarPubMed
Martins, R. 1976 New Archaeological Techniques for the Study of Ancient Root Crops in Peru. Unpublished Ph.D. dissertation, Department of Archaeology, University of Birmingham, United Kingdom.Google Scholar
McKey, Doyle, Rostain, Stéphen, Iriarte, José, Glaser, Bruno, Birk, Jago Jonathan, Hoist, Irene, and Renard, Delphine 2010 Pre-Columbian Agricultural Landscapes, Ecosystem Engineers, and Self-Organized Patchiness in Amazonia. Proceedings of the National Academy of Science 107:7823–7828.CrossRefGoogle ScholarPubMed
Mora, Santiago, Herrera, Luisa Fernanda, Cavelier, Inés, and Rodríguez, Camilo 1991 Cultivars, Anthropic Soils and Stability: A Preliminary Report of Archaeological Research in Araracuara, Colombian Amazon. Latin American Archaeology Reports No. 2. University of Pittsburgh, Pittsburgh.Google Scholar
Moran, Emilio F. 1991 Human Adaptive Strategies in Amazonian Blackwater Ecosystems. American Anthropologist 93:361–382.Google Scholar
Moseley, Michael E. 1992 The Incas and Their Ancestors. Thames and Hudson, London.Google Scholar
Nassar, Nagib M.A. 2000 Cytogenetics and Evolution of Cassava (Manihotesculenta Crantz). Genetics and Molecular Biology 23:1003–1014.CrossRefGoogle Scholar
Nestel, Barry, and Maclntyre, Reginald (editors) 1973 Chronic Cassava Toxicity: Proceedings of an Interdisciplinary Workshop, London, England, 29–30 January, 1973. International Development Research Centre, Ottawa.Google Scholar
Ng, N.Q. and Ng, S.Y.C. 2002 Genetic Resources and Conservation. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti. pp.167–177. CABI, Wallingford and New York.Google Scholar
Oliver, José R. 2001 The Archaeology of Forest Foraging and Agricultural Production in Amazonia. In Unknown Amazon, edited by Colin McEwan, CristianaBarreto, and Eduardo Neves, pp. 50–85. British Museum Press, London. Google Scholar
Olsen, Kenneth M. 2002 Population History of Manihot esculenta (Euphorbiaceae) Inferred from Nuclear DNA Sequences. Molecular Ecology 11:901–911.Google Scholar
Olsen, Kenneth M., and Schaal, Barbara A. 1999 Evidence on the Origin of Cassava: Phylogeography of Manihot esculenta. Proceedings of the National Academy of Science 96:5586–5591.Google Scholar
Olsen, Kenneth M., and Schaal, Barbara A. 2001 Microsatellite Variation in Cassava (Manihot esculenta, Euphorbiaceae) and its Wild Relatives: Further Evidence for a Southern Amazonian Origin of Domestication. American Journal of Botany 88:131–142.Google Scholar
Olsen, Kenneth M., and Schaal, Barbara A. 2006 DNA Sequence Data and Inferences on Cassava's Origin of Domestication. In Documenting Domestication: New Genetic and Archaeological Paradigms, edited by Melinda A. Zeder, Eve Emschwiller, Daniel G. Bradley, and Bruce D. Smith, pp. 123–133. University of California Press, Berkeley. Google Scholar
Pearsall, Deborah M. 1992 The Origins of Plant Cultivation in South America. In The Origins of Agriculture: An International Perspective, edited by C. Wesley Cowan and Patty Jo Watson, pp. 173–205. Smithsonian Institution Press, Washington, DC. Google Scholar
Perry, Linda 2002 Starch Granule Size and the Domestication of Manioc (Manihot esculenta) and Sweet Potato (Ipomoea batatas). Economic Botany 56:335–349.Google Scholar
Perry, Linda 2004 Starch Analyses Reveal the Relationship between Tool Type and Function: An Example from the Orinoco Valley of Venezuela. Journal of Archaeological Science 31:1069–1081.Google Scholar
Perry, Linda 2005 Reassessing the Traditional Interpretation of “Manioc” Artifacts in the Orinoco Valley of Venezuela. Latin American Antiquity 16:409–426.CrossRefGoogle Scholar
Perry, Linda, Sandweiss, Daniel H., Piperno, Dolores R., Rademaker, Kurt, Malpass, Michael A., Umire, Adán, and Vera, Pablo de la 2006 Early Maize Agriculture and Interzonal Interaction in Southern Peru. Nature 440:76–79.Google Scholar
Piperno, Dolores R. 1988 Phytolith Analysis: An Archaeological and Geological Perspective. Academic Press, San Diego.Google Scholar
Piperno, Dolores R. 1998 Paleoethnobotany in the Neotropics from Microfossils: New Insights into Ancient Plant Use and Agricultural Origins in the Tropical Forest. Journal of World Prehistory 12:393–449.Google Scholar
Piperno, Dolores R. 2006a Phytoliths: A Comprehensive Guide for Archaeologists and Paleoecologists. AltaMira Press, Lanham.Google Scholar
Piperno, Dolores R. 2006b Identifying Manioc (Manihot esculenta Crantz) and other Crops in Pre-Columbian Tropical America through Starch Grain Analysis: A Case Study from Central Panama. In Documenting Domestication: New Genetic and Archaeological Paradigms, edited by Melinda A. Zeder, Eve EmschwiUer, Daniel G. Bradley, and Bruce D. Smith, pp. 46–67. University of California Press, Berkeley. Google Scholar
Piperno, Dolores R. 2009 Identifying Crop Plants with Phytoliths (and Starch Grains) in Central and South America: A Review and an Update of the Evidence. Quaternary international 193:146–159.Google Scholar
Piperno, Dolores R., and Becker, Peter F. 1996 Vegetational History of a Site in the Central Amazon Basin Derived from Phytolith and Charcoal Records from Natural Soils. Quaternary Research 45:202–209.Google Scholar
Piperno, Dolores R., and Dillehay, Tom D. 2008 Starch Grains on Human Teeth Reveal Early Broad Crop Diet in Northern Peru. Proceedings of the National Academy of Sciences 105:19622–19627.Google Scholar
Piperno, Dolores R., and Hoist, Irene 1998 The Presence of Starch Grains on Prehistoric Stone Tools from the Humid Neotropics: Indications of Early Tuber Use and Agriculture in Panama. Journal of Archaeological Science 25:765–776.Google Scholar
Piperno, Dolores R., and Pearsall, Deborah M. 1998 The Origins of Agriculture in the Lowland Neotropics. Academic Press, San Diego.Google Scholar
Piperno, Dolores R., Ranere, Anthony J., Hoist, Irene, and Hansell, Patricia 2000 Starch Grains Reveal Early Root Crop Horticulture in the Panamanian Tropical Forest. Nature 407:894–897.Google Scholar
Pohl, Mary D., Pope, Kevin O., Jones, John G., Jacob, John S., Piperno, Dolores R., deFrance, Susan D., Lentz, David L., Gifford, John A., Danforth, Marie E., and Kathryn Josserand, J. 1996 Early Agriculture in the Maya Lowlands. Latin American Antiquity 7:355–372.Google Scholar
Politis, Gustavo 2001 Foragers of the Amazon: The Last Survivors or the First to Succeed? In Unknown Amazon, edited by Colin McEwan, Cristiana Barreto, and Eduardo Neves, pp. 26–49. British Museum Press, London. Google Scholar
Pope, Kevin O., Pohl, Mary E. D., Jones, John G., Lentz, David L., Nagy, Christopher von, Vega, Francisco J., and Quitmyer, Irvy R. 2001 Origin and Environmental Setting of Ancient Agriculture in the Lowlands of Mesoamerica. Science 292:1370–1373.Google Scholar
Rival, Laura, and McKey, Doyle 2008 Domestication and Diversity in Manioc (Manihot esculenta Crantz ssp. esculenta, Euphorbiaceae). Current Anthropology 49:1119–1128.Google Scholar
Roa, Ana Carolina, Maya, María M., Duque, Myriam Cristina, Tohme, Joseph,Bonierbale, Antonio C., and Allem, Merideth W. 1997 AFLP Analysis of Relationships among Cassava and Other Manihot Species. Theoretical and Applied Genetics 95:741–750.Google Scholar
Rogers, David J. 1963 Studies of Manihot esculenta Crantz and Related Species. Bulletin of the Torrey Botanical Club 90:43–54.Google Scholar
Rogers, David J., and Appan, Subramaniam G. 1973 Manihot and Manihotoides (Euphorbiaceae): A Computer Assisted Study. Flora Neotropica Monograph 13. Hafner, New York.Google Scholar
Rogers, David J., and Fleming, Henry S. 1973 A Monograph of Manihot esculenta with an Explanation of the Taximetrics Methods Used. Economic Botany 27:1–113.Google Scholar
Roosevelt, Anna C. 1980 Parmana: Prehistoric Maize and Manioc Subsistence along the Amazon and Orinoco. Academic Press, New York.Google Scholar
Rossen, Jack, Dillehay, Tom D., and Ugent, Donald 1996 Ancient Cultigens or Modern Intrusions?: Evaluating Plant Remains in an Andean Case Study. Journal of Archaeological Science 23:391–407 Google Scholar
Sauer, Carl O. 1950 Cultivated Plants of South and Central America. In Handbook of South American Indians, Volume 6, edited by Julian H. Steward, pp. 487–543. Smithsonian Institution, Washington, D.C. Google Scholar
Sauer, Carl O. 1952 Agricultural Origins and Dispersals. American Geographical Society, New York.Google Scholar
Sauer, Carl O. 1969a [1936] American Agricultural Origins: A Consideration of Nature and Culture. In Land and Life: A Selection from the Writings of Carl Ortwin Sauer, edited by John Leighly, pp. 121–144. University of California Press, Berkeley and Los Angeles. Google Scholar
Sauer, Carl O. 1969b [1959] Age and Area in American Cultivated Plants. In Seeds, Spades, Hearths, & Herds: The Domestication of Animals and Foodstuffs. 2nd ed., pp. 113–134. MIT Press, Cambridge and London.Google Scholar
Sauer, Carl O. 1969c [1964] Cultural Factors in Plant Domestication in the New World. In Seeds, Spades, Hearths, & Herds: The Domestication of Animals and Foodstuffs. 2nd ed., pp. 135–146. MIT Press, Cambridge and London.Google Scholar
Sauer, Jonathan D. 1993 Historical Geography of Crop Plants: A Select Roster. CRC, Boca Raton.Google Scholar
Stone, Doris (editor) 1984 Pre-Columbian Plant Migration. Papers of the Peabody Museum of Archaeology and Ethnology Vol. 76. Harvard University, Cambridge.Google Scholar
Towle, Margaret A. 1961 The Ethnobotany of Pre-Columbian Peru. Viking Fund, Chicago.Google Scholar
Torrence, Robin, and Barton, Huw (editors) 2006 Ancient Starch Research. Left Coast Press, Walnut Creek, California.Google Scholar
Ugent, Donald, Pozorski, Shelia, and Pozorski, Thomas 1986 Archaeological Manioc (Manihot) from Coastal Peru. Economic Botany 40:78–102.CrossRefGoogle Scholar
Vavilov, Nikolai I. 1951 Phytogeographic Basis of Plant Breeding: The Origin, Variation, Immunity and Breeding of Cultivated Plants. Chronica Botanica 13:1–366.Google Scholar
Westby, Andrew 2002 Cassava Utilization, Storage and Small-scale Processing. In Cassava: Biology, Production and Utilization, edited by Rory J. Hillocks, J. Michael Thresh, and Anthony C. Bellotti, pp. 281–300. CABI, Wallingford and New York. Google Scholar
Wilson, Warren M. 2003 Cassava (Manihot esculenta Crantz), Cyanogenic Potential, and Predation in Northwestern Amazonia: The Tukanoan Perspective. Human Ecology 31:403–416.Google Scholar
Zarrillo, Sonia, Pearsall, Deborah M., Scott Raymond, J., Tisdale, Mary Ann, and Quon, Dugane J. 2008 Directly Dated Starch Residues Document Early Formative Maize (Zea mays L.) in Tropical Ecuador. Proceedings of the National Academy of Sciences 105:5006–5011.CrossRefGoogle ScholarPubMed