Publications Scientifiques

[ Article ] Genetic variability in yams cultivars from the Guinea-Sudan zone of Benin assessed by random amplified polymorphic DNA

Date de soumission: 13-03-2017
Année de Publication: 2009
Entité/Laboratoire Laboratoire de Génétique Ecologique
Document type : Article
Discipline(s) : Génétique et Amélioration des Plantes
Titre Genetic variability in yams cultivars from the Guinea-Sudan zone of Benin assessed by random amplified polymorphic DNA
Auteurs ZANNOU A. S. AFIO [1], Agbicodo E. [2], ZOUNDJIHEKPON JEANNE [3], STRUIK P. C. [4], Ahanchede Adam [5], KOSSOU KODJO DANSOU [6], SANNI AMBALIOU [7],
Journal: African Journal of Biotechnology
Catégorie Journal: Internationale
Impact factor: 0.82
Volume Journal: 8
DOI:
Resume Yam (Dioscorea spp.) is an important food and cash crop in the Guinea-Sudan zone of Benin. The genetic diversity of about 70 cultivars of Dioscorea cayenensis / Dioscorea rotundata (Guinea yam) and about 20 cultivars of Dioscorea alata (water yam) was analysed using random amplified polymorphic DNA (RAPD). The amplified bands revealed high polymorphism. These polymorphic DNA fragments were used to construct dendrograms, clustering all accessions into 18 groups : 12 for D. cayenensis/ D. rotundata and six for D. alata. The analysis of molecular variance revealed highly significant variation among species, among groups within species, and among cultivars within groups. The study showed that the genetic diversity changed along a spatial gradient. In general, there was a tendency that most of the varieties from the north-east and north-west of the zone investigated appeared to be distinctive from the ones of the centre. However, few varieties were distributed randomly and did not reflect any specific relation to their zone of collection. The current study suggests that the Guinea-Sudan zone of Benin has a large gene pool of yam varieties. Yam farmers may have played a significant role in the enrichment and the maintenance of the genetic diversity of yam.
Mots clés Dioscorea alata, Dioscorea cayenensis/D. rotundata, farmers’ varieties, gene pool, genetic diversity, RAPD
Pages 26 - 36
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