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Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of Cameroon

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Abstract

Using IPGRI's descriptors, 45 accessions of Guinea yams(Dioscorea cayenensis Lam./Dioscorea rotundata Poir. complex) collectedin Cameroon were classified into six cultivar groups based on theirmorphological similarities. An identification key is proposed for thecultivar groups. Six enzymatic systems (6PGD, PGI, AAT, SKDH,PGM, EST) were also used to assess genetic variation withinthese cultivated yams. Twenty-eight genotypes were identifiedwithin the 45 accessions analysed. The clustering of accessions basedon isozyme data is very close to the one obtained using morphologicalcharacters.

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Authors and Affiliations

  1. International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria (

    H.D. Mignouna

  2. International Institute of Tropical Agriculture (IITA), 08, BP0932, Cotonou, Bénin

    A. Dansi

  3. Roots and Tubers Research Project (ROTREP), IRAD EKONA, Cameroon

    S. Zok

Authors
  1. H.D. Mignouna
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  2. A. Dansi
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  3. S. Zok
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Correspondence to H.D. Mignouna.

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Mignouna, H., Dansi, A. & Zok, S. Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of Cameroon. Genetic Resources and Crop Evolution 49, 21–29 (2002). https://doi.org/10.1023/A:1013805813522

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