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This study was designed to evaluate the effects of some root - promoting substances on rooting andmini tuber formation using vine cuttings obtained from two genotypes (TDr 335 and TDr 93 - 49) of whiteyam (D. rotundata). The ashes were obtained from rice straw, bamboo, Gliricidia sepium, dry leav...


Agele, S.O.Ayankanmi, T.G.Kikuno, H.[Effects of synthetic hormone substitutes and genotypes on rooting and mini tuber production of vines cuttings obtained from white yam (Dioscorea rotundata, Poir)]Effects of synthetic hormone substitutes and genotypes on rooting and mini tuber production of vines cuttings obtained from white yam (Dioscorea rotundata, Poir)

Growth of varieties of Dioscorea alata and D. rotundata were stunted when they were grown in nutrient solutions containing 5 to 60 mg l−1 Fe. In D. alata variety TDa 95/00361, plants grown in 60 mg l−1 Fe solution exhibited reductions of 29–65% in plant height, leaf length and width, number of le...


Shiwachi, H.Kikuno, H.Okonkwo, C.C.Asiedu, Robert[Iron toxicity symptoms in yams (Dioscorea spp.) grown in water culture]Iron toxicity symptoms in yams (Dioscorea spp.) grown in water culture

Single node cuttings from pathogen-tested in vitro plantlets of white guinea yam (D. rotundata), cultivar TDr 93–23, were cultured in tuberization and half- and full-strength Murashige and Skoog media with 5% or 8% sucrose, with or without agar, in light or darkness and at 25 or 18°C. Microtuberi...


Balogun, M.Fawole, I.Ng, S.Y.C.Ng, N.Q.Shiwachi, H.Kikuno, H.[Interaction among cultural factors in microtuberization of white yam (Dioscorea rotundata)]Interaction among cultural factors in microtuberization of white yam (Dioscorea rotundata)
Kikuno, H.Matsumoto, R.Shiwachi, H.Toyohara, H.Asiedu, Robert[Comparative effects of explants sources and age of plant on rooting, shooting and tuber formation of vine cuttings of yams (Dioscorea spp.)]Comparative effects of explants sources and age of plant on rooting, shooting and tuber formation of vine cuttings of yams (Dioscorea spp.)

Scarcity of seed, pest and diseases are major constraints to yam production. Tissue culture techniques of meristem culture combined with heat therapy have been used to produce high-yielding virus-tested plantlets of root crops, which are later multiplied through micropropagation. However, the mic...


Balogun, M.Ng, S.Y.C.Fawole, I.Shiwachi, H.Kikuno, H.[Relative effects of Uniconazole p and other growth regulators on micropropagation ratio of yam (Dioscorea spp.) plantlets at different growth phases]Relative effects of Uniconazole p and other growth regulators on micropropagation ratio of yam (Dioscorea spp.) plantlets at different growth phases

The genus Dioscorea is considered to be one of the most difficult groups for cyto-taxonomic studies because of the large number and small size of the chromosomes. The objective of the present study was to develop an efficient method of chromosome observation by identifying the optimum time for co...


Babil, P.K.Kikuno, H.Shiwachi, H.Toyohara, H.Fujigaki, J.Fujimaki, H.Asiedu, Robert[Optimum time for collection of root samples for chromosome observation in yams (Dioscorea spp.)]Optimum time for collection of root samples for chromosome observation in yams (Dioscorea spp.)

The genus Dioscorea is considered to be one of the most difficult groups for cyto-taxonomic studies because of the large number and small size of the chromosomes. The objective of the present study was to develop an efficient method of chromosome. Observation by identifying the optimum time for c...


Babil, P.K.Kikuno, H.Shiwachi, H.Toyohara, H.Fujigaki, J.Fujimaki, H.Asiedu, Robert[Optimum time for collecting root samples for chromosome observation in Dioscorea spp.]Optimum time for collecting root samples for chromosome observation in Dioscorea spp.

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