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Journal Article 2003-04

Autor: Shiwachi, H. Ayankanmi, T.G. Asiedu, Robert Onjo, M.

A reliable means to induce sprouting in dormant seed tubers of yams (Dioscorea species) is required to enhance flexibility in planting date and rate of propagation of the crop. Experiments were conducted to assess the potential of two gibberellin inhibitors, Uniconazole-P and Prohexadione-calcium...

Enlace original: https://cgspace.cgiar.org/handle/10568/96362

Investigación en Agricultura
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Shiwachi, H. ,  Ayankanmi, T.G. ,  Asiedu, Robert ,  Onjo, M. ,  [Induction of sprouting in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins] ,  Induction of sprouting in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins
Journal Article 2004

Autor: Acha, I.A. Shiwachi, H. Asiedu, Robert Akoroda, M.O.

Treatment with indolebutyric acid (IBA) significantly increased the number of roots produced by vine cuttings of ten Dioscorea rotundata cultivars. Some cultivars could be propagated by layering, especially with IBA treatment, but layering does not appear to be feasible for use on farms.

Enlace original: https://cgspace.cgiar.org/handle/10568/96403

Investigación en Agricultura
IBA
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Acha, I.A. ,  Shiwachi, H. ,  Asiedu, Robert ,  Akoroda, M.O. ,  [Effect of auxins on root development in yam (Dioscorea rotundata) vine] ,  Effect of auxins on root development in yam (Dioscorea rotundata) vine
Journal Article 2004

Autor: Shiwachi, H. Okonkwo, C. Asiedu, Robert

Symptoms of nutritional deficiencies in D. alata and D. rotundata were observed when yam plants were grown in nutrient solutions from which any of the following had been omitted: N, P, K, Ca, Mg, Zn, Fe, B, Mn, Cu and Mo. The symptoms of deficiency of major elements were visible on plants of both...

Enlace original: https://cgspace.cgiar.org/handle/10568/103377

Investigación en Agricultura
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Shiwachi, H. ,  Okonkwo, C. ,  Asiedu, Robert ,  [Nutrient deficiency symptoms in yams (Dioscorea spp.)] ,  Nutrient deficiency symptoms in yams (Dioscorea spp.)
Journal Article 2005

Autor: Kikuno, H. Oladimeji, Z. Ebuehi, A. Shiwachi, H. Onjo, M. Asiedu, Robert
Enlace original: https://cgspace.cgiar.org/handle/10568/103444

Investigación en Agricultura
Enlace permanente

Kikuno, H. ,  Oladimeji, Z. ,  Ebuehi, A. ,  Shiwachi, H. ,  Onjo, M. ,  Asiedu, Robert ,  [Effect of n-propyl dihydrojasmonate (PDJ) on in vitro growth of yam (Dioscorea spp.) explants] ,  Effect of n-propyl dihydrojasmonate (PDJ) on in vitro growth of yam (Dioscorea spp.) explants
Journal Article 2014

Autor: Balogun, M. Ng, S.Y.C. Fawole, I. Shiwachi, H. Kikuno, H.

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/76045

Investigación en Agricultura
Enlace permanente

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
Journal Article 2002

Autor: Shiwachi, H. Ayankanmi, T.G. Asiedu, Robert

Sixty-day-old plants of white Guinea yam (Dioscorea rotundata), water yam (D. alata) and yellow Guinea yam (D. cayenensis) were exposed to 10 h day lengths (short days) for 15 and 30 days. Short-day treatment applied at the early growth stage of yams promoted the enlargment of tubers, but the res...

Enlace original: https://cgspace.cgiar.org/handle/10568/103630

Investigación en Agricultura
Enlace permanente
Shiwachi, H. ,  Ayankanmi, T.G. ,  Asiedu, Robert ,  [Effect of day length on the development of tubers in yams (Dioscorea spp.)] ,  Effect of day length on the development of tubers in yams (Dioscorea spp.)
Journal Article 2010

Autor: Babil, P.K. Kikuno, H. Shiwachi, H. Toyohara, H. Fujigaki, J. Fujimaki, H. Asiedu, Robert

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/90365

Investigación en Agricultura
Enlace permanente
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.)
Journal Article 2005

Autor: Ayankanmi, T.G. Shiwachi, H. Asiedu, Robert

Seed tuber production of Dioscorea rotundata using the minisett technique was tested on-farm and on-station in different agro-ecological zones in Nigeria. A lower sprouting rate of minisetts was observed in the southern Guinea savanna than in the tropical forest zone. Sprouting and tuber yield in...

Enlace original: https://cgspace.cgiar.org/handle/10568/91890

Investigación en Agricultura
Enlace permanente
Ayankanmi, T.G. ,  Shiwachi, H. ,  Asiedu, Robert ,  [Sprouting and yield of yam (Diocorea spp.) minisetts in relation to sett size, soil moisture and agroecology] ,  Sprouting and yield of yam (Diocorea spp.) minisetts in relation to sett size, soil moisture and agroecology
Journal Article 2005

Autor: Shiwachi, H. Kikuno, H. Asiedu, Robert

Mini tubers were produced from two varieties of Dioscorea rotundata using vine cuttings planted in carbonized rice husk or coco-peat in a screen house. The cuttings established better and produced more mini tubers in carbonized rice husk than in coco-peat 100 days after planting. Vine cuttings of...

Enlace original: https://cgspace.cgiar.org/handle/10568/91889

Investigación en Agricultura
Enlace permanente
Shiwachi, H. ,  Kikuno, H. ,  Asiedu, Robert ,  [Mini tuber production using yam (Dioscorea rotundata) vines] ,  Mini tuber production using yam (Dioscorea rotundata) vines
Journal Article 2005

Autor: Shiwachi, H. Ayankanmi, T.G. Asiedu, Robert

In experiments in 2001 to 2003, 50-day-old plants of four varieties of white Guinea yam (D. rotundata) were exposed to 10 h (short-day) day length for 15 days, 14 h for 30 days or constant 24 h, with natural day length as the control. Under natural day length the male varieties flowered earlier t...

Enlace original: https://cgspace.cgiar.org/handle/10568/91888

Investigación en Agricultura
Enlace permanente
Shiwachi, H. ,  Ayankanmi, T.G. ,  Asiedu, Robert ,  [Effect of photoperiod on the development of inflorescences in white Guinea yam (Dioscorea rotundata)] ,  Effect of photoperiod on the development of inflorescences in white Guinea yam (Dioscorea rotundata)

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