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The ploidy levels of the twenty-two yam (Dioscorea cayenensis-D. rotundata complex) cultivars within germplasm Cameroon Guinea yam were determined by flow cytometry. Three different ploidy levels (4x,6x, 8x) were detected within the samples analysed. Fifteen cultivars were tetraploids, five were hexaploids, and two were octoploids. The cultivar group EKOTO(More)
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(More)
A procedure for chromosome doubling of the white cocoyam (Xanthosoma sagittifolium) type was established by using colchicine and oryzalin treatments to in vitro plantlets. Flow cytometry was successfully used for analyzing ploidy levels within three cocoyam types and regenerated plants. Treating in vitro white cocoyam with 0.05% colchicine for 7 days(More)
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