Publications Scientifiques

[ Article ] Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscoreacayenensis/D. rotundata) complex in Bénin Republic

Date de soumission: 15-03-2017
Année de Publication: 1999
Entité/Laboratoire Laboratoire de Génétique Ecologique
Document type : Article
Discipline(s) : Génétique et Amélioration des Plantes
Titre Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscoreacayenensis/D. rotundata) complex in Bénin Republic
Auteurs DANSI ANAGONOU ALEXANDRE [1], Mignouna H. D. [2], ZOUNDJIHEKPON JEANNE [3], Sangare A. [4], Asiedu R. [5], Quin M. [6],
Journal: Genetic Resources and Crop Evolution
Catégorie Journal: Internationale
Impact factor: 0
Volume Journal: 46
DOI:
Resume A better knowledge of traditional cultivars is a prerequisite to overcoming the various constraints of yam production in Benin. Using IPGRI’s descriptors, 560 accessions of cultivated yams (D. cayenensis Lam/D. rotundata Poir.complex) collected throughout Benin, were characterized. Ninety morphotypes were identified and further classified into 26 cultivar groups based in their morphological similarities. An identification keys is proposed for the cultivar groups. The geographical distribution of cultivar groups is also presented and two centres of diversity are identified. A comparative study between the cultivated forms and their wild relatives (D. abyssinica Hochst, D. Praehensilis Benth and D. burkilliana Miège) has allowed us to establish linkages between the identified morphotypes and wild species and to postulate some hypotheses which will be further tested using isozyme and DNA markers. The flowering and the fruiting capacity of the morphotypes as well as their adaptability (based on tuber morphology) to mechanical harvesting are also discussed. Some collections in Nigeria (IITA, Ibadan) and Togo containing cultivars from many West African countries were inspected to verify the geographical distribution of Beninese cultivars.
Mots clés adjacent countries, Benin Republic, cultivar group, Dioscorea cayenensis/Dioscorea rotundata complex, hybrid origin, identification key, morphological diversity, related wild species, yam
Pages 371 - 388
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