The evolutionary ecology of clonally propagated domesticated plants

New Phytologist

Volumn 186, Issue 2, 2010, Pages 318-332

  McKey, Doyle ^a,b   Elias, Marianne ^c,d   Pujol, Marianne Elias ^e   Duputié, Anne ^a,f  

^a CENTRE D ECOLOGIE FONCTIONNELLE ET EVOLUTIVE   (France)

^b UNIV MONTPELLIER   (France)

^c IMPERIAL COLLEGE LONDON   (United Kingdom)

^d MUSÉUM NATIONAL D'HISTOIRE NATURELLE   (France)

^e CNRS   (France)

^f UNIVERSITY OF TEXAS AT AUSTIN   (United States)

Author keywords

Clonal propagation; Crop plants; Domestication syndrome; Genetic diversity; Inbreeding; Mating system; Resource allocation; Traditional crop management

Indexed keywords

ADAPTIVE RADIATION; AGRICULTURAL WORKER; CLONAL GROWTH; CLONAL ORGANISM; CROP PLANT; CROP YIELD; DICOTYLEDON; DOMESTIC SPECIES; DOMESTICATION; EVOLUTIONARY BIOLOGY; GENETIC DIFFERENTIATION; GENOTYPE; GLOBAL CHANGE; HARVESTING; INBREEDING; RESOURCE ALLOCATION; SEED PROPAGATION; SELECTION; SEXUAL REPRODUCTION; SPECIES DIVERSITY;

MANIHOT ESCULENTA;

BIOLOGICAL MODEL; CELL CLONE; CROP; ECOLOGY; EVOLUTION; GENETICS; GROWTH, DEVELOPMENT AND AGING; METHODOLOGY; REVIEW; TISSUE CULTURE TECHNIQUE;

CLONE CELLS; CROPS, AGRICULTURAL; ECOLOGY; EVOLUTION; MODELS, BIOLOGICAL; TISSUE CULTURE TECHNIQUES;

EID: 77954719711     PISSN: 0028646X     EISSN: 14698137     Source Type: Journal    
DOI: 10.1111/j.1469-8137.2010.03210.x     Document Type: Review

References (125)

1. Abraham K, Gopinathan Nair P. 1991. Polyploidy and sterility in relation to sex in Dioscorea alata L. (Dioscoreaceae). Genetica 83: 93-97.
2. Abraham K, Naïr SG, Sreekumari MT, Unnikrishnan M. 1986. Seed set and seedling variation in greater yam (Dioscorea alata L.). Euphytica 35: 337-343.
3. Andow DA, Zwahlen C. 2006. Assessing environmental risks of transgenic plants. Ecology Letters 9: 196-214.
4. Ashman TL. 2006. The evolution of separate sexes: a focus on the ecological context. In: Harder LD, Barrett SCH, eds. Ecology and evolution of flower. New York, NY, USA: Oxford University Press, 204-222.
5. Balloux F, Lehmann L, de Meeüs T. 2003. The population genetics of clonal and partially clonal diploids. Genetics 164: 1635-1644.
6. Barnaud A, Deu M, Garine E, Chantereau J, Bolteu J, Ouin Koïda E, McKey D, Joly HI. 2009. A weed-crop complex in sorghum: the dynamics of genetic diversity in a traditional farming system. American Journal of Botany 96: 1869-1879.
7. Barrett SCH. 1983. Crop mimicry in weeds. Economic Botany 37: 255-282.
8. Bartsch D, Cuguen J, Biancardi E, Sweet J. 2003. Environmental implications of gene flow from sugar beet to wild beet-current status and future research needs. Environmental Biosafety Research 2: 105-115.
9. Besnard G, Khadari B, Villemur P, Berville A. 2000. Cytoplasmic male sterility in the olive (Olea europaea L.). Theoretical and Applied Genetics 100: 1018-1024.
10. Bressman EN. 1934. Inheritance of sex in certain seed plants. American Journal of Botany 21: 328-349.
11. Burke JM, Arnold ML. 2001. Genetics and the fitness of hybrids. Annual Review of Genetics 35: 31-52.
12. Campbell MM, Brunner AM, Jones HM, Strauss SH. 2003. Forestry's fertile crescent: the application of biotechnology to forest trees. Plant Biotechnology Journal 1: 141-154.
13. Ceballos H, Iglesias CA, Pérez JC, Dixon AGO. 2004. Cassava breeding: opportunities and challenges. Plant Molecular Biology 56: 503-516.
14. Celis C, Scurrah M, Cowgill S, Chumbiauca S, Green J, Franco J, Main G, Kiezebrink D, Visser RGF, Atkinson HJ. 2004. Environmental biosafety and transgenic potato in a centre of diversity for this crop. Nature 432: 222-225.
15. Chapin FS, Zavaleta ES, Eviner VT, Naylor RL, Vitousek PM, Reynolds HL, Hooper DU, Lavorel S, Sala OE, Hobbie SE et al. 2000. Consequences of changing biodiversity. Nature 405: 234-242.
16. Chikwendu VE, Okezie CEA. 1989. Factors responsible for the ennoblement of African yams: inferences from experiments in yam domestication. In: Harris DR, Hillman GC, eds. Foraging and farming. The evolution of plant exploitation. London, UK: Unwin Hyman, 344-357.
17. Cooper HD, Spillane C, Hodgkin T. 2001. Broadening the genetic base of crop production. Rome, Italy: FAO / IPGRI.
18. Coppens d'Eeckenbrugge G, Leal F. 2003. The pineapple: botany, production and uses. In: Bartholomew DP, Paull RE, Rohrbach KG, eds. The pineapple: botany, production and uses. Oxon, UK: CABI, 13-32.
19. Corner EJH. 1949. The durian theory or the origin of the modern tree. Annals of Botany 13: 368-414.
20. Crutsinger GM, Souza L, Sanders NJ. 2008. Intraspecific diversity and dominant genotypes resist plant invasions. Ecology Letters 11: 16-23.
21. David P, Pujol B, Viard F, Castella V, Goudet J. 2007. Reliable selfing rate estimates from imperfect population genetic data. Molecular Ecology 16: 2474-2487.
22. De Langhe E, Vrydaghs L, de Maret P, Perrier X, Denham T. 2009. Why bananas matter: an introduction to the history of banana domestication. Ethnobotany Research and Applications 7: 165-177.
23. Dobzhansky TG. 1952. Nature and origin of heterosis. In: Gowen JW, ed. Heterosis. Ames, IA, USA: Iowa State College Press, 218-223.
24. Duputié A, David P, Debain C, McKey D. 2007. Natural hybridization between a clonally propagated crop, cassava (Manihot esculenta Crantz) and a wild relative in French Guiana. Molecular Ecology 16: 3025-3038.
25. Duputié A, Massol F, David P, Haxaire C, McKey D. 2009. Traditional Amerindian cultivators combine directional and ideotypic selection for sustainable management of cassava genetic diversity. Journal of Evolutionary Biology 22: 1317-1325.
26. Eckert CG. 2002. The loss of sex in clonal plants. Evolutionary Ecology 15: 501-520.
27. Elias M, Lenoir H, McKey D. 2007. Propagule quantity and quality in traditional Makushi farming of cassava (Manihot esculenta): A case study for understanding domestication and evolution of vegetatively propagated crops. Genetic Resources and Crop Evolution 54: 99-115.
28. Elias M, McKey D. 2000. The unmanaged reproductive ecology of domesticated plants in traditional agroecosystems: an example involving cassava and a call for data. Acta Oecologica 21: 223-230.
29. Elias M, McKey D, Panaud O, Anstett MC, Robert T. 2001a. Traditional management of cassava morphological and genetic diversity by the Makushi Amerindians (Guyana, South America): perspectives for onfarm conservation of crop genetic resources. Euphytica 120: 143-157.
30. Elias M, Mühlen GS, McKey D, Roa AC, Tohme J. 2004. Genetic diversity of traditional South American landraces of cassava (Manihot esculenta Crantz): an analysis using microsatellites. Economic Botany 58: 242-256.
31. Elias M, Penet L, Vindry P, McKey D, Panaud O, 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.
32. Elias M, Rival L, McKey D. 2000. Perception and management of cassava (Manihot esculenta Crantz) diversity among Makushi Amerindians of Guyana (South America). Journal of Ethnobiology 20: 239-265.
33. Ellstrand NC, Schierenbeck KA. 2000. Hybridization as a stimulus for the evolution of invasiveness in plants? Proceedings of the National Academy of Sciences, USA 97: 7043-7050.
34. Emperaire L, Pinton F, Second G. 1998. Gestion dynamique de la diversité variétale du manioc en Amérique du Nord-Ouest. Nature, Sciences et Sociétés 6: 27-42.
35. Engels JMM, Rao RR. 1995. Regeneration of seed crops and their wild relatives. ICRISAT, Hyderabad, India: International Plant Genetic Resources Institute.
36. Fisher RA. 1930. The genetical theory of natural selection. Oxford, UK: Clarendon Press.
37. Franks T, Botta R, Thomas MR. 2002. Chimerism in grapevines: implications for cultivar identity, ancestry and genetic improvement. Theoretical and Applied Genetics 104: 192-199.
38. Fregene M, Suarez M, Mkumbira J, Kulembeka H, Ndedya E, Kulaya A, Mitchel S, Gullberg S, Rosling H, Dixon AGO et al. 2003. Simple sequence repeat marker diversity in cassava landraces: genetic diversity and differentiation in an asexually propagated crop. Theoretical and Applied Genetics 107: 1083-1093.
39. Gabrielsen TM, Brochmann C. 1998. Sex after all: high levels of diversity detected in the arctic clonal plant Saxifraga cernua using RAPD markers. Molecular Ecology 7: 1701-1708.
40. Gepts P. 2004. Crop domestication as a long-term selection experiment. In: Janick J, ed. Plant breeding reviews. New York, NY, USA: John Wiley & Sons, 1-44.
41. Gerrish PJ, Lenski RE. 1998. The fate of competing beneficial mutations in an asexual population. Genetica 1023: 127-144.
42. Gibson RW, Jeremiah SC, Aritua V, Msabaha RP, Mpembe I, Ndunguru J. 2000. Sweet potato virus disease in sub-Saharan Africa: evidence that neglect of seedlings in the traditional farming system hinders the development of superior resistant landraces. Journal of Phytopathology 148: 441-447.
43. Gill DE, Chao L, Perkins SL, Wolf JB. 1995. Genetic mosaicism in plants and clonal animals. Annual Review of Ecology and Systematics 26: 423444.
44. Glémin S, Bataillon T. 2009. A comparative view of the evolution of grasses under domestication. New Phytologist 183: 273-290.
45. Glémin S, Bazin E, Charlesworth D. 2006. Impact of mating systems on patterns of sequence polymorphism in flowering plants. Proceedings of the Royal Society Series B - Biological Sciences 273: 3011-3019.
46. Grivet L, Daniels C, Glaszmann JC, D'Hont A. 2004. A review of recent molecular genetics evidence for sugarcane evolution and domestication. Ethnobotany Research and Applications 2: 9-17.
47. Guillemin M-L, Faugeron S, Destombe C, Viard F, Correa JA, Valéro M. 2008. Genetic variation in wild and cultivated populations of the haploid-diploid red alga Gracilaria chilensis; how farming practices favor asexual reproduction and heterozygosity. Evolution 62: 1500-1519.
48. Hahn SK. 1995. Yams. In: Smartt J, Simmonds NW, eds. Evolution of crop plants. Harlow, UK: Longman Scientific & Technical, 112-120.
49. Hajjar R, Jarvis DI, Gemmill-Herren B. 2008. The utility of crop genetic diversity in maintaining ecosystem services. Agriculture Ecosystems & Environment 123: 261-270.
50. Halsey ME, Olsen KM, Taylor NJ, Chavarriaga-Aguirre P. 2008. Reproductive biology of cassava (Manihot esculenta Crantz) and isolation of experimental field trials. Crop Science 48: 49-58.
51. Harder LD, Johnson SD. 2009. Darwin's beautiful contrivances: evolutionary and functional evidence for floral adaptation. New Phytologist 183: 530-545.
52. Harlan JR, de Wet JMJ, Price EG. 1973. Comparative evolution of cereals. Evolution 27: 311-325.
53. Hather JG. 1996. The origins of tropical vegeculture: Zingiberaceae, Araceae and Dioscoreaceae in Southeast Asia. In: Harris DR, ed. The origin and spread of agriculture and pastoralism in Eurasia. Crops, fields, flocks and herds. London, UK: UCL Press, 538-550.
54. Hosaka K, Hanneman RE. 1998. Genetics of self-compatibility in a self-incompatible wild diploid potato species Solanum chacoense. 1. Detection of an S locus inhibitor (Sli) gene. Euphytica 99: 191-197.
55. Husband BC, Schemske DW. 1996. Evolution of the magnitude and timing of inbreeding depression in plants. Evolution 50: 54-70.
56. Ivančič A, Lebot V. 2000. The genetics and breeding of taro. Montpellier, France: CIRAD.
57. Jablonka E, Raz G. 2009. Transgenerational epigenetic inheritance: prevalence, mechanisms, and implications for the study of heredity and evolution. Quarterly Review of Biology 84: 131-176.
58. Jakše J, Kindlhofer K, Javornik B. 2001. Assessment of genetic variation and differentiation of hop genotypes by microsatellite and AFLP markers. Genome 44: 773-782.
59. Janick J. 2005. The origins of fruits, fruit growing, and fruit breeding. Plant Breeding Reviews 25: 255-320.
60. Johannessen CL. 1966. The domestication process in trees reproduced by seed: the Pejibaye palm in Costa Rica. Geographical Review 56: 363-376.
61. Judson OP, Normark BB. 1996. Ancient asexual scandals. Trends in Ecology & Evolution 11: A41-A46.
62. Kays SJ, Nottingham SF. 2008. Biology and chemistry of the Jerusalem Artichoke. Boca Raton, FL, USA: CRC Press.
63. Kennedy J. 2008. Pacific bananas: complex origins, multiple dispersals? Asian Perspectives 47: 75-94.
64. Kjellberg F, Gouyon PH, Ibrahim M, Raymond M, Valdeyron G. 1987. The stability of the symbiosis between dioecious figs and their pollinators: a study of Ficus carica L. and Blastophaga psenes L. Evolution 41: 693-704.
65. Klaehn FU. 1963. The relationship of vegetative propagation to topophysis, cyclophysis and periphysis in forest trees. Proceedings of the 10th Northeastern Forest Tree Improvement Conference. Durham, NH, USA. 42-50.
66. Klekowski EJ. 2003. Plant clonality, mutation, diplontic selection and mutational meltdown. Biological Journal of the Linnean Society 79: 61-67.
67. Kondrashov AS. 1988. Deleterious mutations and the evolution of sexual reproduction. Nature 336: 435-440.
68. Lebot V. 1992. Genetic vulnerability of Oceania's traditional crops. Experimental Agriculture 28: 309-323.
69. Lebot V. 2009. Tropical root and tuber crops: cassava, sweet potatoes, yams and aroids. Wallingford, UK: CABI.
70. Legg JP. 1999. Emergence, spread and strategies for controlling the pandemic of cassava mosaic virus disease in east and central Africa. Crop Protection 18: 627-637.
71. Lippman ZB, Zamir D. 2007. Heterosis: revisiting the magic. Trends in Genetics 23: 60-66.
72. López-Almansa JC, Pannell JR, Gil L. 2003. Female sterility in Ulmus minor (Ulmaceae): A hypothesis invoking the cost of sex in a clonal plant. American Journal of Botany 90: 603-609.
73. Lozano JC, Nolt BL. 1989. Pests and pathogens of cassava. In: Kahn RP, ed. Plant protection and quarantine, Vol. II. Selected pests and pathogens of quarantine significance. Boca Raton, FL, USA: CRC Press, 169-182.
74. Lukens LN, Doebley J. 1999. Epistatic and environmental interactions for quantitative trait loci involved in maize evolution. Genetical Research 74: 291-302.
75. Lushai G, Loxdale HD. 2002. The biological improbability of a clone. Genetical Research 79: 1-9.
76. McKey D, Elias M, Pujol B, Duputié A in press. Ecological approaches to crop domestication. In: Gepts P, Bettinger R, Brush SB, Famula T, McGuire PE, Qualset CO, eds. Biodiversity in agriculture: domestication, evolution and sustainability. Cambridge, UK: Cambridge University Press.
77. Médard R. 1973. Morphogenèse du manioc, Manihot esculenta Crantz (Euphorbiacées-Crotonoidées) : étude desciptive. Adansonia (Serie 2) 13: 483-494.
78. Meilleur BA. 1998. Clones within clones: cosmology and esthetics in Polynesian crop selection. Anthropologica 40: 71-82.
79. Mock KE, Rowe CA, Hooten MB, Dewoody J, Hipkins VD. 2008. Clonal dynamics in western North American aspen (Populus tremuloides). Molecular Ecology 17: 4827-4844.
80. Mondolot L, Marlas A, Barbeau D, Gargadennec A, Pujol B, McKey DB. 2008. Domestication and defence: foliar tannins and C / N ratios in cassava and a close wild relative. Acta Oecologica 34: 147-154.
81. Morris ML, Bellon MR. 2004. Participatory plant breeding research: opportunities and challenges for the international crop improvement system. Euphytica 36: 21-35.
82. Muller HJ. 1932. Some genetic aspects of sex. The American Naturalist 66: 118-138.
83. Muller HJ. 1964. The relation of recombination to mutational advance. Mutation Research 1: 2-9.
84. Nishiyama I, Miyazaki T, Sakamoto S. 1975. Evolutionary autoploidy in the sweet potato (Ipomoea batatas (L.) Lam.) and its progenitors. Euphytica 24: 197-208.
85. Noyer JL, Causse S, Tomekpe K, Bouet A, Baurens FC. 2005. A new image of plantain diversity assessed by SSR, AFLP and MSAP markers. Genetica 124: 61-69.
86. Obeso JR. 2002. The costs of reproduction in plants. New Phytologist 155: 321-348.
87. Orive ME. 2001. Somatic mutations in organisms with complex life histories. Theoretical Population Biology 59: 235-249.
88. Otto SP, Hastings IM. 1998. Mutation and selection within the individual. Genetica 102-103: 507-524.
89. Parlevliet JE. 2007. How to maintain improved cultivars. Euphytica 153: 353-362.
90. Pickersgill B. 2007. Domestication of plants in the Americas: insights from Mendelian and molecular genetics. Annals of Botany 100: 925-940.
91. Pineda-Krch M, Lehtilä K. 2002. Cell lineage dynamics in stratified shoot apical meristems. Journal of Theoretical Biology 219: 495-505.
92. Pujol B, David P, McKey D. 2005a. Microevolution in agricultural environments: how a traditional Amerindian farming practice favours heterozygosity in cassava (Manihot esculenta Crantz, Euphorbiaceae). Ecology Letters 8: 138-147.
93. Pujol B, Gigot G, Laurent G, Pinheiro-Kluppel M, Elias M, Hossaert-McKey M, McKey D. 2002. Germination ecology of cassava (Manihot esculenta Crantz, Euphorbiaceae) in traditional agroecosystems: seed and seedling biology of a vegetatively propagated domesticated plant. Economic Botany 56: 366-379.
94. Pujol B, McKey D. 2006. Size asymmetry in intraspecific competition and the density-dependence of inbreeding depression in a natural plant population: a case study in cassava (Manihot esculenta Crantz, Euphorbiaceae). Journal of Evolutionary Biology 19: 85-96.
95. Pujol B, Mühlen GS, Garwood N, Horoszowski Y, Douzery EJP, McKey D. 2005b. Evolution under domestication: contrasting functional morphology of seedlings in domesticated cassava and its closest wild relatives. New Phytologist 166: 305-318.
96. Purugganan MD, Fuller DQ. 2009. The nature of selection during plant domestication. Nature 457: 843-848.
97. Reusch TBH, Ehlers A, Hammerli A, Worm B. 2005. Ecosystem recovery after climatic extremes enhanced by genotypic diversity. Proceedings of the National Academy of Sciences, USA 102: 2826-2831.
98. Rival L, McKey D. 2008. Domestication and diversity in manioc (Manihot esculenta Crantz ssp. esculenta, Euphorbiaceae). Current Anthropology 49: 1116-1125.
99. Rival A, Jaligot E, Beulé T, Finnegan EJ. 2008. Isolation and expression analysis of genes encoding MET, CMT, and DRM methyltransferases in oil palm (Elaeis guineensis Jacq.) in relation to the 'mantled' somaclonal variation. Journal of Experimental Botany 59: 3271-3281.
100. Robbins WJ. 1964. Topophysis, a problem in somatic inheritance. Proceedings of the American Philosophical Society 108: 395-403.
101. Ronsheim ML, Anderson SE. 2001. Population-level specificity in the plant-mycorrhizae association alters intraspecific interactions among neighboring plants. Oecologia 128: 77-84.
102. Ross-Ibarra J, Molina-Cruz A. 2002. The ethnobotany of Chaya(Cnidoscolus aconitifoliusssp.aconitifolius Breckon): Anutritious Maya vegetable. EconomicBotany 56: 350-365.
103. Salick J. 1995. Toward an integration of evolutionary ecology and economic botany Personal perspectives on plant / people interactions. Annals of the Missouri Botanical Garden 82: 25-33.
104. Scarcelli N, Tostain S, Vigouroux Y, Agbangla C, Daïnou O, Pham JL. 2006. Farmers' use of wild relative and sexual reproduction in a vegetatively propagated crop. The case of yam in Benin. Molecular Ecology 15: 2421-2431.
105. Schaffner JH. 1923. Sex reversal in the Japanese hop. Bulletin of the Torrey Botanical Club 50: 73-79.
106. Schön I, Martens K. 2003. No slave to sex. Proceedings of the Royal Society of London Series B-Biological Sciences 270: 827-833.
107. Scurrah M, Celis-Gamboa C, Chumbiauca S, Salas A, Visser RGF. 2008. Hybridization between wild and cultivated potato species in the Peruvian Andes and biosafety implications for deployment of GM potatoes. Euphytica 164: 881-892.
108. Segnou CA, Fatokun CA, Akoroda MO, Hahn SK. 1992. Studies on the reproductive biology of white yam (Dioscorea rotundata Poir.). Euphytica 64: 197-203.
109. Shamel AD, Pomeroy CS. 1936. Bud mutations in horticultural crops. Journal of Heredity 27: 486-494.
110. Simmonds NW. 1997. A review of potato propagation by means of seed, as distinct from clonal propagation by tubers. Potato Research 40: 191-214.
111. Spillane C, Curtis MD, Grossniklaus U. 2004. Apomixis technology development virgin births in farmers' fields? Nature Biotechnology 22: 687-691.
112. Stoeckel S, Grange J, Fernández-Manjarres JF, Bilger I, Frascaria-Lacoste N, Mariette S. 2006. Heterozygote excess in a self-incompatible and partially clonal forest tree species (Prunus avium L). Molecular Ecology 15: 2109-2118.
113. Strange RN, Scott PR. 2005. Plant disease: a threat to global food security. Annual Review of Phytopathology 43: 83-116.
114. Thompson JM, Vanderzwet T, Draper AD, Blake RC. 1976. Evidence of cytoplasmic and genetic male-sterility in pears. Journal of Heredity 67: 339-346.
115. USDA, ARS, National Genetic Resources Program. 2009. Germplasm Resources Information Network - (GRIN). (Online Database). National Germplasm Resources Laboratory, Beltsville, MD, USA. http://www.ars-grin.gov/cgi-bin/npgs/acc/search.pl?accid=%20PI+558601 (accessed 16 November 2009).
116. Waller DM. 1988. Plant morphology and reproduction. In: Lovett Doust J, Lovett Doust L, eds. Plant reproductive ecology: patterns and strategies. New York, NY, USA: Oxford University Press, 203-227.
117. Whitham TG, Slobodchikoff CN. 1981. Evolution by individuals, plantherbivore interactions, and mosaics of genetic variability: the adaptive significance of somatic mutations in plants. Oecologia 49: 287-292.
118. Wrigley G. 1995. Date Palm. In: Smartt J, Simmonds NW, eds. Evolution of crop plants. Harlow, UK: Longman Scientific & Technical, 399-403.
119. Yaegaki H, Miyake M, Haji T, Yamaguchi M. 2003. Inheritance of male sterility in Japanese apricot (Prunus mume). Hortscience 38: 1422-1423.
120. Yamamoto M, Matsumoto R, Okudai N, Yamada Y. 1997. Aborted anthers of Citrus result from gene-cytoplasmic male sterility. Scientia Horticulturae 70: 9-14.
121. Zeven AC. 1976. Pepper. In: Simmonds NW, ed. Evolution of crop plants. Harlow, UK: Longman Scientific & Technical, 234-235.
122. Zhu YY, Chen HR, Fan JH, Wang YY, Li Y, Chen JB, Fan JX, Yang SS, Hu LP, Leung H et al. 2000. Genetic diversity and disease control in rice. Nature 406: 718-722.
123. Zohary D. 1984. Modes of evolution under domestication. In: Grant W, ed. Plant Biosystematics. Toronto, Canada: Academic Press, 579-596.
124. Zohary D. 2004. Unconscious selection and the evolution of domesticated plants. Economic Botany 58: 5-10.
125. Zohary D, Spiegel-Roy P. 1975. Beginnings of fruit growing in the Old World. Science 187: 319-327.