• Gemma Arnau
  • K. Abraham
  • M.N. Sheela
  • Hana Chair
  • Alieu Sartie
  • Robert Asiedu
Part of the Handbook of Plant Breeding book series (HBPB, volume 7)


Yams, belonging to the genus Dioscorea, family Dioscoreaceae, are an important food crop in tropical and subtropical regions (Ayensu and Coursey, 1972). Yam plants are dioecious monocotyledonous vines, cultivated for their starchy tubers. Yam is a multi-species, polyploid, and vegetatively propagated crop, exclusively propagated by means of “setts,” small tubers or small pieces of tuber.


Basic Chromosome Number Anthracnose Resistance Varietal Group Dioscorea Species Tetraploid Variety 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Abang MM (1997) Morphology and virulence of isolates of Colletotrichum gloesporioides from yam (Dioscorea spp.) in Nigeria. MSc Dissertation, University of Nigeria, Nsukka, Nigeria, 147pp.Google Scholar
  2. Abang MM, Winter S, Mignouna HD, Green KR, Asiedu R (2003) Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease. Afr J Biotechnol 2(12): 486–496.Google Scholar
  3. Abraham K (1992) Dormancy and viability of Dioscorea alata seeds. J Root Crops 18: 142–143.Google Scholar
  4. Abraham K (2002) Genetic potential of sexually propagated seedlings of greater yam, Dioscorea alata L. J Root Crops 28(2): 21–25.Google Scholar
  5. Abraham K, Arnau G (2007) Use of DNA markers for genetically improving the productivity, palatability, storability and dry matter content of tubers of greater yam. In: Mid-term report of IFCPAR Project Number 3000-B1. IFCPAR eds., New Delhi, India, 26pp.Google Scholar
  6. Abraham K, Nair PG (1990) Floral Biology and artificial pollination in Dioscorea alata L. Euphytica 48: 45–51.Google Scholar
  7. Abraham K, Nair PG (1991) Polyploidy and sterility in relation to sex in Dioscorea alata L. (Dioscoreaceae). Genetica 83: 93–97.CrossRefGoogle Scholar
  8. Abraham K, Nair SG, Sreekumari MT (1989) White yam, Dioscorea rotundata Poir., dwarf type. Trop Agric (Trinidad) 66: 184–186.Google Scholar
  9. Abraham K, Nair SG, Sreekumari MT, Unnikrishnan M (1986) Seed set and seedling variation in greater yam (Dioscorea alata L). Euphytica 35: 227–343.CrossRefGoogle Scholar
  10. Abraham K, Sreekumari MT, Sheela MN (2006) Seed production strategies and progeny selection in greater yam breeding. In: Proceedings of 14th Triennial Symposium of the International Society for Tropical Roots Crops, Thiruvananthapuram, Kerala, India, pp. 51–52.Google Scholar
  11. Agbaje GO, Adegbite AA (2006) Comparison of yield performance and profitability in hybrid yam varieties cultivated under staked and unstaked production systems. J Food Agric Environ 4: 183–187.Google Scholar
  12. Agbaje GO, Adegbite AA, Akinlosotu TA (2003) Performance of new hybrid yam (D. rotundata Poir.) varieties in the forest zone of Nigeria. Tropicultura 21(3): 149–152.Google Scholar
  13. Agbaje GO, Adegbite AA, Akinlosotu TA, Shoyinka SA (2002) Performance of new hybrid yam varieties (D. rotundata Poir.) under different cropping systems. Afr J Root Tuber Crops 5(1): 8–11.Google Scholar
  14. Akoroda MO (1983) Principal component analysis of variation among Nigerian yellow yams. Euphytica 32: 565–573.CrossRefGoogle Scholar
  15. Akoroda MO, Chheda HR (1983) Agro-botanical and species relationships of Guinea yams. Trop Agric 60: 242–248.Google Scholar
  16. Alexander J, Coursey DG (1969) The origins of yam cultivation. In: Ucko PJ, Dimbleby GH (eds.) The domestication and exploitation of plants and animals. Duckworth Publishers, London, pp 405–425.Google Scholar
  17. Ano G, Gelabale J, Marival P (2005) L’igname D. alata, la génétique et l’anthracnose. Phytoma 584: 36–39.Google Scholar
  18. Arnau G, Filloux D, Engelmann F (2008) Appui à la filière Igname en Guadeloupe : production intégrée en culture d’ignames, vers l’élaboration de systèmes de culture innovants. Rapport final du Projet européen DOCUP C2211-5291.CIRAD eds., 23pp.Google Scholar
  19. Arnau G, Maledon E, Bachand I, Abraham K (2006) Production of interploid hybrids and molecular markers heterozygosity determination using microsatellite markers in the greater yam, D. alata: importance for the genetic improvement of the greater yam. In: Proceedings of 14th Triennial Symposium of the International Society for Tropical Roots Crops, Thiruvananthapuram, Kerala, India, pp. 52–53.Google Scholar
  20. Arnau G, Maledon E, Némorin A (2007a) Genetic improvement of the greater yam D. alata through polyploidy breeding. In: Colon W, Lugo WI (eds.) Marketing opportunities for agriculture and forestry products in the Greater Caribbean – A challenge for the 21st century. Caribbean Food Crops Society, San José, Costa Rica. Annual Meeting Caribbean Food Crops Society, San José, Costa Rica, p. 112, 16–22 September.Google Scholar
  21. Arnau G, Nemorin A, Maledon E, Abraham K (2009) Revision of ploidy status of Dioscorea alata L (Dioscoreaceae) by cytogenetic and microsatellite segregation analysis. Theor Appl Genet 118: 1239–1249.PubMedCrossRefGoogle Scholar
  22. Arnau G, Némorin A, Maledon E, Lambert F (2007b) Morpho-agronomic, cytogenetic and molecular characterization of the CIRAD yam collection for their enhancement and utilization in genetic improvement programs. In: Colon W, Lugo WI (eds.) Marketing opportunities for agriculture and forestry products in the Greater Caribbean – A challenge for the 21st century. Caribbean Food Crops Society, San José, Costa Rica. Annual Meeting Caribbean Food Crops Society, San José, Costa Rica, p. 43, 16–22 September.Google Scholar
  23. Asemota HN, Ramser J, Lopez-Peralta C, Weising K, Kahl G (1996) Genetic variation and cultivar identification of Jamaican yam germplasm by random amplified polymorphic DNA analysis. Euphytica 92: 341–351.CrossRefGoogle Scholar
  24. Ayensu ES (1972) Dioscoreales. In: Metcalfe CR (ed.) Anatomy of the monocotyledons. Oxford University Press, London, pp. 1–182.Google Scholar
  25. Ayensu ES, Coursey DG (1972) Guinea yams. The botany, ethnobotany, use and possible future of yams in West Africa. Econ Bot 26: 301–318.CrossRefGoogle Scholar
  26. Bourret D(1973) Etude ethnobotanique des Dioscoreacees alimentaires. Ignames de Nouvelle Calédonie. Thèse 3eme cycle. Faculté des Sciences, Université de Paris, Paris, 135pp.Google Scholar
  27. Bousalem M (2004) Connaissance et sauvegarde de l’igname indienne (cousse-couche) en Guyane. CricCrag Niouz 25: 6–7.Google Scholar
  28. Bousalem M, Arnau G, Hochu I, Arnolin R, Viader V, Santoni S, David J (2006) Microsatellite segregation analysis and cytogenetic evidence for tetrasomic inheritance in the American yam Dioscorea trifida and a new basic chromosome number in the Dioscoreae. Theor Appl Genet 113: 439–451.PubMedCrossRefGoogle Scholar
  29. Bousalem M, Boulardin G, Viader V, Basso T, Bereau D, de Granville JJ, Caristan P, Pham JL, Arnolin R (2010) The Amerindian yam, Dioscorea Trifida, and its wild relatives in French Guiana: human and ecogeographic environment, collecting and in vitro conservation. Acta Amazonica (in press).Google Scholar
  30. Bousalem M, Dallot S, Fuji S, Natsuaki KT (2003) Origin, world-wide dispersion, biogeographical diversification, radiation and recombination: an evolutionary history of Yam mild mosaic virus (YMMV). Infect Genet Evol 3: 189–206.PubMedCrossRefGoogle Scholar
  31. Bousalem M, Dallot S, Guyader S (2000a) Using phylogenetic data to develop molecular tools for the detection and genotyping of Yam mosaic virus. Potential application in molecular epidemiology. J Virol Methods 90: 25–36.CrossRefGoogle Scholar
  32. Bousalem M, Douzery EJ, Fargette D (2000b) High genetic diversity, distant phylogenetic relationships and intraspecies recombination events among natural populations of Yam mosaic virus: a contribution to understanding potyvirus evolution. J Gen Virol 81: 243–255.PubMedGoogle Scholar
  33. Bousalem M, Loubet S (2008) Molecular evidence for a new potyvirus species in yam (Dioscorea spp.) on the island of Guadeloupe. Plant Pathol 57(2): 389–389.Google Scholar
  34. Bousalem M, Viader V, Mariac C, Gomez RM, Hochu I, Santoni S, David J (2010) Evidence of diploidy in the wild Amerindian yam, a putative progenitor of the endangered species Dioscorea trifida (Dioscoreaceae). Genome 53: 371–383.PubMedCrossRefGoogle Scholar
  35. Burkill IH (1960) The organography and the evolution of the Dioscoreaceae, the family of the yams. J Linn Soc Lond Bot 56: 319–412.CrossRefGoogle Scholar
  36. Chair H, Perrier X, Agbangla C, Marchand JL, Dainou O, Noyer JL (2005) Use of cpSSRs for the characterisation of yam phylogeny in Benin. Genome 48: 674–684.PubMedCrossRefGoogle Scholar
  37. Coursey DG (1967) Yams. Longmans, London, 230pp.Google Scholar
  38. Coursey DG (1976) The origins and domestication of yams in Africa. In: Harlan JR (ed.) Origins of African domestication. Mouton Publisher, The Hague, pp. 383–408.Google Scholar
  39. Daniel IO, Ng NQ, Tayo TO, Togun AO (2002) Wet-cold preservation of West African yam (Dioscorea spp.) pollen. J Agric Sci 138: 57–62.CrossRefGoogle Scholar
  40. Dansi A, Mignouna HD, Pillay M, Zok S (2001) Ploidy variation in the cultivated yams (Dioscorea cayenensis-Dioscorea rotundata complex) from Cameroon as determined by flow cytometry. Euphytica 119: 301–307.CrossRefGoogle Scholar
  41. Dansi A, Mignouna HD, Zoundjihèkpon J (1999) Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscorea cayenensis/D. rotundata) complex in Benin Republic. Genet Resour Crop Evol 46: 371–388.CrossRefGoogle Scholar
  42. Dansi A, Mignouna HD, Zoundjihekpon J, Sangaré A, Ahoussou N, Asiedu R (2000a) Identification of some Benin Republic’s Guinea yam (Dioscorea cayenensis-D. rotundata complex) cultivars using randomly amplified polymorphic DNA. Genet Resour Crop Evol 57: 619–625.CrossRefGoogle Scholar
  43. Dansi A, Mignouna HD, Zoundjihekpon J, Sangaré A, Asiedu R, Ahoussou N (2000b) Using isozyme polymorphism to assess genetic variation within cultivated yams (Dioscorea cayenensis/ Dioscorea rotundata complex) of the Republic of Benin. Genet Resour Crop Evol 47: 371–383.CrossRefGoogle Scholar
  44. Dansi A, Pillay M, Mignouna HD, Dainou O, Mondeil F, Moutairou K (2000c) Ploidy level of the cultivated yams (Dioscorea cayenensis/D. rotundata complex) from the Republic of Benin as determined by chromosome counting and flow cytometry. Afr Crop Sci J 8: 355–364.Google Scholar
  45. De Candolle A (1886) Origin of Cultivated Plants, 2nd edn. Hafner, New York, NY.CrossRefGoogle Scholar
  46. Degras L (1969) Quelques données sur la variabilité de descendance d’igname Cousse-couche D. trifida. VIIe Congrès Soc. Inter-Caraïbe pour les Plantes Alimentaires (CFCS). Guadeloupe-Martinique, INRA ed, pp. 59–65.Google Scholar
  47. Degras L (1993) The yam, a tropical root crop. MacMillan, London, 408pp.Google Scholar
  48. Dumont R, Dansi A, Vernier P, Zoundjihekpon J (2005) Biodiversité et domestication des ignames en Afrique de l’Ouest: pratiques traditionnelles conduisant à Dioscorea rotundata. In: Repères, CIRAD (ed.), 120pp.Google Scholar
  49. Dumont R, Vernier P (2000) Domestication of yams (Dioscorea cayenesis-rotundata) within the Bariba ethnic group in Benin. Outlook Agric 29: 137–142.CrossRefGoogle Scholar
  50. Egesi CN, Asiedu R (2002) Analysis of yam yields using the Additive Main Effects and Multiplicative Interaction (AMMI) model. Afr Crop Sci J 10(3): 195–201.Google Scholar
  51. Egesi CN, Ogunyemi S, Asiedu R (2005) Genotype x environment interaction in water yam (Dioscorea alata) yield trials in five yam-growing sites in Nigeria. J Genet Breed 59: 81–88.Google Scholar
  52. Egesi CN, Onyeka TJ, Asiedu R (2007) Severity of anthracnose and virus diseases of water yam (Dioscorea alata L.) in Nigeria I: effects of yam genotype and date of planting. Crop Prot 26: 1259–1265.CrossRefGoogle Scholar
  53. Essad S (1984) Variation géographique des nombres chromosomiques de base et polyploïdie dans le genre Dioscorea à propos du dénombrement des espèces transversa Brown, pilosiuscula Bert et trifida. Agron 4: 611–617.CrossRefGoogle Scholar
  54. Filloux D, Girard JC (2006) Indexing and elimination of viruses infecting yams (Dioscorea spp.) for the safe movement of germplasm. In: Proceedings 14th Triennial Symposium of the International Society for Tropical Root Crops, Trivandrum, India.Google Scholar
  55. Gamiette F, Bakry F, Ano G (1999) Ploidy determination of some yam species (Dioscorea spp.) by flow cytometry and conventional chromosomes counting. Genet Resour Crop Evol 46: 19–27.CrossRefGoogle Scholar
  56. Hamon P (1987) Structure, origine génétique des ignames du complexe Dioscorea cayenensis-rotundata et domestication des ignames en Afrique de l’Ouest. Thèse de doctorat d’état Sciences naturelles Paris Sud Orsay N° 3335.Google Scholar
  57. Hamon P, Hamon S, Touré B (1986) Les ignames du complexe Dioscorea cayenensis-rotundata de Côte d’Ivoire. Inventaire et description des cultivars traditionnels. I.B.P.G.R. F.A.O, Rome.Google Scholar
  58. Hamon P, Touré B (1990) Characterization of traditional yam varieties belonging to the Dioscorea cayenensis-rotundata complex by their isozymic patterns. Euphytica 46: 101–107.CrossRefGoogle Scholar
  59. Hochu I, Santoni S, Bousalem M (2006) Isolation, characterization and cross-species amplification of microsatellite DNA loci in the tropical American yam Dioscorea trifida. Mol Ecol Notes 6: 137–140.CrossRefGoogle Scholar
  60. Jackson GVH (1994) Taro and yam genetic resources in the Pacific and Asia. A Report Prepared for the Australian Centre for International Agricultural Research and the International Plant Genetic Research Institute, Camberra, Australia, Anutech pty. Ltd.Google Scholar
  61. Kay DE (1973) Crop and product digest n°2, Root crops. The Tropical Products Institute (Ed.), London, 245pp.Google Scholar
  62. Kwoseh CK, Plowright RA, Bridge J, Asiedu R (2007) Search for Scutellonema bradys resistance in yams (Dioscorea spp.). J Sci Technol 27(2): 33–42.Google Scholar
  63. Lagemann J (1977) Traditional African farming systems in Eastern Nigeria. Weltforum Verlag, Muenchen.Google Scholar
  64. Lebot V (1997) Synthèse des résultats sur les plantes à tubercules en Nouvelle Caledonie. CIRAD Rapport interne, Noumea, New Caledonia, 175pp.Google Scholar
  65. Lebot V (2003) Report of INCO-DC Project 1999–2003 “Yam: Cultivar Selection for Disease Resistance & Commercial Potential in Pacific Islands” n° ERBIC18CT980309Rl Cirad (Ed.).Google Scholar
  66. Lebot V (2009) Tropical root and tuber crops: cassava, sweet potato, yams and aroids. CABI, Wallingford, XIX-413pp.Google Scholar
  67. Lebot V, Trilles B, Noyer JL, Modesto J (1998) Genetic relationships between Dioscorea alata L. cultivars. Genet Resour Crop Evol 45: 499–509.CrossRefGoogle Scholar
  68. Mahalakshmi V, Ng Q, Atalobhor J, Ogunsola D, Lawson M, Ortiz R (2007) Development of a West African yam Dioscorea spp. Core collection. Genet Resour Crop Evol 54: 1817–1825.CrossRefGoogle Scholar
  69. Malapa R (2005) Description de la diversité de Dioscorea alata L. du Vanouatou à l’aide de marqueurs agro-morphologiques et moléculaires (AFLP). Relations avec les autres espèces de la section Enanthiophyllum. PhD thesis, Ecole Nationale Supérieure Agronomique de Rennes, France, 247pp.Google Scholar
  70. Malapa R, Arnau G, Noyer JL, Lebot V (2005) Genetic diversity of the greater yam (Dioscorea alata L.) and relatedness to D. nummularia Lam. and D. transversa Br. as revealed with AFLP markers. Genet Resour Crop Evol 52: 919–929.CrossRefGoogle Scholar
  71. Malapa R, Noyer JL, Marchand JL, Lebot V (2006) Genetic relationship between Dioscorea alala L. and D. nummularia Lam. as revealed by AFLP markers. In: Motley TJ, Zerega N, Cross H (eds.) Darwin’s harvest: new approaches to the origins, evolution, and conservation of crops. Columbia University Press, New York, NY, pp. 239–265.Google Scholar
  72. Malaurie B, Pungu O, Dumont R, Trouslot MF (1993) The creation of an in vitro germplasm collection of yam (Dioscorea spp.) for genetic resources preservation. Euphytica 65: 113–122.CrossRefGoogle Scholar
  73. Malaurie B, Pungu O, Trouslot MF (1995) Effect of growth concentrations on morphological development of meristem-tips in Dioscorea cayenensis-rotundata complex and D. praehensilis. Plant Cell Tissue Organ Cult 41: 229–235.CrossRefGoogle Scholar
  74. Mantell SH (1994) Summary of the Final report of EU Contract TS2-A-117: development of anthracnose disease resistant Dioscorea yams using somatic fusion techniques. In: Risopoulos S (ed.) Projets de recherche 1987–1991, Vol. 1. CTA/DGXII Joint Publication, pp. 69–75.Google Scholar
  75. Mantell SH, Boccon-Gibod J (1998) Progress towards the realisation of biotechnological tools for genetic improvement of Dioscorea spp. In: Berthaud J, Bricas N, Marchand JL (eds.) L’igname, plante séculaire et culture d’avenir. Cirad Editions, Montpellier, France, pp. 163–180 (454p). Proceedings of the International Workshop Cirad, Inra, Ird, Coraf held in Montpellier, France, June, 3–6 1997.Google Scholar
  76. Mantell SH, Haque SQ, Whitehall AP (1978) Clonal multiplication of Dioscorea alata L and Dioscorea rotundata yams by tissue culture. J Hortic Sci 53: 95–98.Google Scholar
  77. Mantell SH, Haque SQ, Whitehall AP (1980) Apical meristem tip culture for eradication of flexous rod viruses in yams (Dioscorea alata). Trop Pest Manag 26(2): 170–179.CrossRefGoogle Scholar
  78. Martin FW (1974) Tropical Yams and Their Potential. Part 3. Dioscorea alata . In: Agriculture handbook No. 495. USDA, Washington, DC.Google Scholar
  79. Martin FW, Degras L (1978) Tropical yams and their potential. Part 6 Minor cultivated Dioscorea species. In: Agricultural handbook No 538. Anonymous Science and Education Administration, US Department of Agriculture (USDA) and USAID, Washington, DC, 23pp.Google Scholar
  80. Martin FW, Delphin H (1978) New superior varieties of Dioscorea alata, the Asian greater yam. J Agric Univ Puerto Rico 62: 64–75.Google Scholar
  81. Martin FW, Rhodes AM (1977) Intra-specific classification of Dioscorea alata. Trop Agric (Trinidad) 54: 1–13.Google Scholar
  82. Mignouna HD, Abang MM, Fagbemi SA (2003) A comparative assessment of molecular marker assays (AFLP, RAPD and SSR) for white yam (Dioscorea rotundata) germplasm characterisation. Ann Appl Biol 142: 269–276.CrossRefGoogle Scholar
  83. Mignouna HD, Abang MM, Green KR, Asiedu R (2001a) Inheritance of resistance in water yam (Dioscorea alata) to anthracnose (Colletotrichum gloeosporioides). Theor Appl Genet 103: 52–55.CrossRefGoogle Scholar
  84. Mignouna HD, Abang MM, Onasanya A, Agindotan B, Asiedu R (2002b) Identification and potential use of RAPD markers linked to Yam mosaic virus resistance in white yam (Dioscorea rotundata Poir.). Ann Appl Biol 140: 163–169.CrossRefGoogle Scholar
  85. Mignouna HD, Abang MM, Onasanya A, Asiedu R (2002a) Identification and application of RAPD markers for anthracnose resistance in water yam (Dioscorea alata). Ann Appl Biol 141: 61–66.CrossRefGoogle Scholar
  86. Mignouna HD, Dansi A (2003a) 6-Phosphogluconate dehydrogenase (6-PGD) in yam (Dioscorea spp.): variation and potential in germplasm characterization and classification. Plant Genet Resour Newsl 133: 27–30.Google Scholar
  87. Mignouna HD, Dansi A (2003b) Yam (Dioscorea spp.) domestication by the Nago and Fon ethnic groups in Benin. Genet Resour Crop Evol 50: 519–528.CrossRefGoogle Scholar
  88. Mignouna HD, Dansi A, Zok S (2002c) Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/ Dioscorea rotundata complex) of Cameroon. Genet Resour Crop Evol 49: 21–29.CrossRefGoogle Scholar
  89. Mignouna H, Ellis N, Knox M, Asiedu R, Ng Q (1998) Analysis of genetic diversity in Guinea yams (Dioscorea spp.) using AFLP fingerprinting. Trop Agric (Trinidad) 75: 224–229.Google Scholar
  90. Mignouna HD, Mank RA, Ellis THN, Van den Bosch N, Asiedu R, Abang MM, Peleman J (2002d) A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance. Theor Appl Genet 105: 726–735.PubMedCrossRefGoogle Scholar
  91. Mignouna HD, Mank RA, Ellis THN, Van den Bosch N, Asiedu R, Ng SYC, Peleman J (2002e) A genetic linkage map of Guinea yam (Dioscorea rotundata L.) based on AFLP markers. Theor Appl Genet 105: 716–725.PubMedCrossRefGoogle Scholar
  92. Mignouna HD, Njukeng P, Abang MM, Asiedu R (2001b) Inheritance of resistance to yam mosaic potyvirus in white yam (Dioscorea rotundata). Theor Appl Genet 103: 1196–2000.CrossRefGoogle Scholar
  93. Misuki I, Tani N, Ishida K, Tsumura Y (2005) Development and characterization of microsatellite markers in a clonal plant, Dioscorea japonica Thunb. Mol Ecol Notes 5: 721–723.CrossRefGoogle Scholar
  94. Mohandas C, Ramakrishnan S, Sheela MN (1996) Evaluation of certain Dioscorea alata germplasm against Meloidogyne incognita. J. Root Crops 22(1): 62–64.Google Scholar
  95. Nair SG, Abraham K, Nayar GG (1987) Two high yielding selections of white yam (Dioscorea rotundata Poir.). J. Root Crops 2: 103–109.Google Scholar
  96. Ng SY (1988) In vitro conservation and distribution of root and tuber crop germplasm. In: Ng NQ, Perrino P, Attere F, Zedan H (eds.) Crop genetic resources of Africa, IBPGR, Roma, Italy Vol II 23: 95–106.Google Scholar
  97. Ng SY, Hahn SK (1985) Application of tissue culture to tuber crops at IITA. In: Biotechnology in international research. IRRI, Manila, pp. 29–38.Google Scholar
  98. Ng SY, Ng NQ (1990) Reduced growth storage of germplasm. In: Dodds JH (ed.) Tissue culture for conservation resources. Croom Helm Ltd., Kent.Google Scholar
  99. Odu BO, Asiedu R, Hughes Jd’A, Shoyinka SA, Oladiran OA (2004a) Evaluation of resistance to Yam mosaic virus (YMV), genus Potyvirus in white yam (Dioscorea rotundata Poir.). Field Crops Res 89: 97–105.CrossRefGoogle Scholar
  100. Odu BO, Asiedu R, Shoyinka SA, Hughes Jd’A (2006a) Reaction of white guinea yam (Dioscorea rotundata Poir.) genotypes to virus diseases in four agroecological zones in Nigeria. J Phytopathol 154: 688–693.CrossRefGoogle Scholar
  101. Odu BO, Asiedu R, Shoyinka SA, Hughes Jd’A (2006b) Screening of water yam (Dioscorea alata L.) genotypes for reactions to viruses. J Phytopathol 154: 716–724.CrossRefGoogle Scholar
  102. Odu BO, Hughes Jd’A, Asiedu R, Ng NQ, Shoyinka SA, Oladiran OA (2004b) Responses of white yam (Dioscorea rotundata) cultivars to inoculation with three viruses. Plant Pathol 53: 141–147.CrossRefGoogle Scholar
  103. Onyeka TJ, Petro D, Ano G, Etienne S, Rubens S (2006) Resistance in water yam (Dioscorea alata) cultivars in the French West Indies to anthracnose disease based on tissue culture-derived whole-plant assay. Plant Pathol 55: 671–678.CrossRefGoogle Scholar
  104. Onyilagha JC (1986) Numerical analysis of variation among Nigerian Dioscorea rotundata accessions. Euphytica 35: 413–419.CrossRefGoogle Scholar
  105. Orkwor GC, Asadu CLA (1998) Agronomy. In: Orkwor GC, Asiedu R, Ekanayake IJ (eds.) Food yams: advances in research. NRCRI and IITA Ibadan, Nigeria.Google Scholar
  106. Otoo E, Asiedu R (2005) The first-ever formal release of yam genotypes in Ghana. In: Tenyiwa JS, Adipala E, Nampala P, Tusiime G, Okori P, Kyamuhangire W (eds.) Proceedings of the 7th African Crop Science Society Conference. Kampala, pp. 203–208, 5–9 December, 2005.Google Scholar
  107. Prain D, Burkill IH (1939) An account of the genus Dioscorea. 1. Species which turn to the right. Ann Rev Bot Gard 14: 211–528.Google Scholar
  108. Ramser J, Weising K, Lopez-Peralta C, Terhalle W, Terauchi R, Kahl G (1997) Molecular marker based taxonomy and phylogeny of Guinea yam (Dioscorea rotundata-D. cayenensis). Genome 40: 903–915.PubMedCrossRefGoogle Scholar
  109. Rao VR, Bammi RK, Randhawa GS (1973) Interspecific hybridization in the genus Dioscorea. Ann Bot 37: 395–401.Google Scholar
  110. Sadik S, Okereke OU (1975) A new approach to improvement of yam Dioscorea rotundata. Nature 254: 134–135.CrossRefGoogle Scholar
  111. Saleil V, Degras L, Jonard R (1990) Obtention de plantes indemnes du virus de la mosaïque de l’igname (YMV) par culture in vitro des apex chez l’igname americaine Dioscorea trifida L. Agronomie 10: 605–615.CrossRefGoogle Scholar
  112. Scarcelli N, Daïnou O, Agbangla C, Tostain S, Pham JL (2005) Segregation patterns of isozyme loci and microsatellite markers show the diploidy of African yam Dioscorea rotundata (2n = 40). Theor Appl Genet 111: 226–232.PubMedCrossRefGoogle Scholar
  113. Scarcelli N, Tostain S, Mariac C (2006a) Genetic nature of yams (Dioscorea sp.) domesticated by farmers in Benin (West Africa). Genet Resour Crop Evol 53: 121–130.CrossRefGoogle Scholar
  114. Scarcelli N, Tostain S, Vigouroux Y, Agbangla C, Daïnou O, Pham JL (2006b) Farmers’ use of wild relative and sexual reproduction in a vegetatively propagated crop. The case of yam in Benin. Mol Ecol 15: 2421–2431.PubMedCrossRefGoogle Scholar
  115. Sheela MN, Arnau G, Abraham K, Sreekumari MT (2006) Comparative analysis of allelic diversity of Indian greater yams. In: Proceedings of 14th Triennial Symposium of the International Society for Tropical Roots Crops, Thiruvananthapuram, Kerala, India, pp. 79–80.Google Scholar
  116. Terauchi R, Chikaleke VA, Thottappilly G, Hahn SK (1992) Origin and phylogeny of Guinea yams as revealed by RFLP analysis of chloroplast DNA and nuclear ribosomal DNA. Theor Appl Genet 83: 743–751.CrossRefGoogle Scholar
  117. Terauchi R, Kahl G (1999) Mapping of the Dioscorea tokoro genome: AFLP markers linked to sex. Genome 42: 752–762.Google Scholar
  118. Terauchi R, Konuma A (1994) Microsatellite polymorphism in Dioscorea tokoro, a wild yam species. Genome 37: 794–801.PubMedCrossRefGoogle Scholar
  119. Thouvenel JC, Dumont R (1990) Pertes de rendement de l’igname infecte par le virus de la mosaique de l’igname en Côte d’Ivoire. L’Agron Trop 45: 125–129.Google Scholar
  120. Tör M, Twyford CT, Funes I, Boccon-Gibod J, Ainsworth CC, Mantell SH (1998) Isolation and culture of protoplasts from immature leaves and embryogenic cell suspensions of Dioscorea yams: tools for transient gene expression studies. Plant Cell Tissue Organ Cult 53: 113–125.CrossRefGoogle Scholar
  121. Tostain S, Agbangla C, Scarcelli N, Mariac C, Dainou O, Berthaud J, Pham JL (2007) Genetic diversity analysis of yam cultivars (Dioscorea rotundata Poir.) in Benin using simple sequence repeat (SSR) markers. Plant Genet Resour 5(2): 71–81.CrossRefGoogle Scholar
  122. Tostain S, Scarcelli N, Brottier P, Marchand JL, Pham JL, Noyer JL (2006) Development of DNA microsatellite markers in tropical yam (Dioscorea sp.). Mol Ecol Notes 6: 173–175.CrossRefGoogle Scholar
  123. Velayudhan KC, Muralidharan VK, Amalraj VA, Thomas TA, Soudhamini P (1989) Studies on the morphotypic variability, distribution and genetic divergence in an indigenous collection of greater yam (Dioscorea alata L.). J Root Crop 15(2): 79–89.Google Scholar
  124. Vernier P, Orkwor GC, Dossou AR (2003) Studies on yam domestication and farmers’ practices in Benin and Nigeria. Outlook Agric 32: 35–41.CrossRefGoogle Scholar
  125. Wilson JE (1982) Present and future roles of yam (Dioscorea spp.) in West Africa. Proceedings of the 5th International Symposium on Tropical Root and Tuber Crops, Los Banos, Philippines, pp. 205–211.Google Scholar
  126. Winch JE, Newhook FJ, Jackson GVH, Cole JS (1984) Studies of Colletotrichum gloesporioides disease on yam (Dioscorea alata) in the Solomon Islands. Plant Pathol 33: 467–477.CrossRefGoogle Scholar
  127. Zannou A, Richards P, Struik PC (2006) Knowledge on yam variety development: insights from farmers’ and researchers’ practices. Knowl Manag Dev J 2(3): 30–39.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Gemma Arnau
    • 1
  • K. Abraham
    • 2
  • M.N. Sheela
    • 2
  • Hana Chair
    • 1
  • Alieu Sartie
    • 3
  • Robert Asiedu
    • 3
  1. 1.Centre de Coopération Internationale en Recherche Agronomique pour le Developpement (CIRAD)Petit BourgFrance
  2. 2.Central Tuber Crops Research Institute (CTCRI)SreekariyamIndia
  3. 3.International Institute of Tropical Agriculture (IITA)IbadanNigeria

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