Publications Scientifiques

[ Article ] Does the Domestication of Yam Wild Type Dioscorea praehensilis and Dioscorea abyssinica has a Genetic Basis?

Date de soumission: 14-02-2018
Année de Publication: 2017
Document type : Article
Discipline(s) :
Titre Does the Domestication of Yam Wild Type Dioscorea praehensilis and Dioscorea abyssinica has a Genetic Basis?
Journal: International Journal of sciences
Catégorie Journal: Internationale
Impact factor: 2.18
Volume Journal: 6
DOI: DOI: 10.18483/ijSci.1431
Resume Guinea yam (Dioscorea cayenensis–D. rotundata complex) is prone to strong genetic erosion. The main causes are climate change, depletion of the soil, the evolution of cultural practices, etc. To combat this threat, several alternatives are possible including domestication process. Indeed, domestication is an ancestral knowledge which is the introduction of wild yams’ tubers to the field. The choice of genotypes to be domesticated is made on the basis of morphological criteria by farmers. To better understand this process and in order to know if it has a genetic basis, survey and sampling were done, in eleven forests and savannas, using a participatory approach strongly involved current and former yam domestication practicing. Based on farmers’ criterions, 140 tubers belonging to D. praehensilis and D. abyssinica were sampled including 53 domesticable D. abyssinica, 38 non domesticable D. abyssinica, 19 domesticable D. praehensilis and 18 non domesticable D. praehensilis and 12 controls (D. togoensis and D. bulbifera). The morphological characterization using the IPGRI descriptors displayed differentiation between domesticable and non-domesticable D. praehensilis with few misclassified samples while a continuum was observed between domesticable and non-domesticable D abyssinica. Nuclear microsatellites markers revealed a fine genetic structuring of these two wild species. Indeed, a clear separation of each of the two species D. abyssinica and D. praehensilis in domesticable and non-domesticable was detected. This supports the hypothesis of the existence of a strong genetic component in the ability to domesticate yams. These molecular data were congruent with the knowledge of farmers separating D. abyssinica and D. praehensilis into domesticable and non domesticable groups on the basis of morphological characters
Mots clés Dioscorea abyssinica, Dioscorea praehensilis, Domestication, Genetic Basis, Microsatellites Markers
Pages 18 - 28

Publications par entité

  • Centre de Formation et de Recherche en matière de Population (CEFORP) (0)
  • Centre Interfacultaire de Formation et de Recherche en Environnement pour le Développement Durable (CIFRED) (0)
  • Chaire Internationale en Physique Mathématique et Applications (CIPMA-Chaire UNESCO) (0)
  • Ecole Doctorale Pluridisciplinaire <<Espaces, Culture et Développement>> (0)
  • Ecole Nationale d'Administration et de Magistrature (ENAM) (0)
  • Ecole Nationle d'Economie Appliquée et de Management (0)
  • Ecole Normale Supérieure (0)
  • Ecole Polytechnique d'Abomey-Calavi (EPAC) (0)
  • Faculté de droit et de Science Politique (FADESP) (0)
  • Faculté des Lettres et Sciences Humaines (FLASH) (0)
  • Faculté des Lettres, Langues, Arts et Communications (FLLAC) (0)
  • Faculté des Sciences Agronomiques (0)
  • Faculté des Sciences de la Santé (FSS) (0)
  • Faculté des Sciences Economiques et de Gestion (FASEG) (0)
  • Faculté des Sciences et Techniques (FAST) (0)
  • Faculté des Sciences Humaines et Sociales (FASHS) (0)
  • Institut de Formation et de Recherche en Informatique (IFRI) (0)
  • Institut de Géographie de l'Aménagement du territoire et de l'Environnement (IGATE) (0)
  • Institut de Mathématiques et de Sciences Physiques (IMSP) (0)
  • Institut National de l'Eau (INE) (0)
  • Institut National des Métiers d'Art d'Archéologie et de la Culture (INMAAC) (0)
  • Institut National Médico Sanitaire ( INMeS) (0)
  • Institut Régional de Santé Publique (IRSP) (0)

Publications par sexe

  • Femme( 1406 )
  • Homme (