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Journal Article 2006

Iron toxicity symptoms in yams (Dioscorea spp.) grown in water culture

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

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/91411

Investigación en Agricultura

DIOSCOREA

IRON TOXICITY

WATER CULTURE

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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

Journal Article 2006

Interaction among cultural factors in microtuberization of white yam (Dioscorea rotundata)

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

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/91374

Investigación en Agricultura

YAMS

MICROTUBERIZATION

CULTURE MEDIUM

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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)

Journal Article 2003

Induction of germination in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins

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/10568/98051

Investigación en Agricultura

YAMS

SPROUTING

GIBBERELLINS

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Shiwachi, H. , Ayankanmi, T.G. , Asiedu, Robert , Onjo, M. , [Induction of germination in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins] , Induction of germination in dormant yam (Dioscorea spp.) tubers with inhibitors of gibberellins

Journal Article 2007

Production of minitubers from vine cuttings of white yam (Dioscorea rotundata)

Autor: Oyetunji, O.J. Kabeya, M. Shiwachi, H.

The multiplication ratio for seed yam production is very low compared to other tuberous crops. Seven clones of Dioscorea rotundata Poir (white yam) were evaluated for production of mini tubers from their vine cuttings. Three to four nodes leafy vine cuttings were prepared from the middle portion ...

Enlace original: https://cgspace.cgiar.org/handle/10568/91459

Investigación en Agricultura

D. ALATA

D. ROTUNDATA POIR

CULTIVARS

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Oyetunji, O.J. , Kabeya, M. , Shiwachi, H. , [Production of minitubers from vine cuttings of white yam (Dioscorea rotundata)] , Production of minitubers from vine cuttings of white yam (Dioscorea rotundata)

Journal Article 2003

Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.)

Autor: Park, B.J. Onjo, M. Tominaga, S. Shiwachi, H. Hayashi, M.

To analyze the mechanism of dormancy in tubers of water yam (Dioscorea alata L.), we studied the relationship between external factors and dormancy and its release in tubers. Several strains of water yam that have been introduced into Japan from Southeast Asia and Oceania were grown in Kagoshima,...

Enlace original: https://cgspace.cgiar.org/handle/10568/97988

Investigación en Agricultura

DORMANCY

SPROUTING

TEMPERATURE

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Park, B.J. , Onjo, M. , Tominaga, S. , Shiwachi, H. , Hayashi, M. , [Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.)] , Relationship between dormancy and its release and external factors in tubers of water yam (Dioscorea alata L.)

Journal Article 2007

Effect of sucrose treatment on root, shoot and tuber formation of vine cuttings of yams (Dioscorea spp.)

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

Enlace original: https://cgspace.cgiar.org/handle/10568/93014

Investigación en Agricultura

SUCROSE

PLANTLETS

CUTTING

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Kikuno, H. , Matsumoto, R. , Shiwachi, H. , Asiedu, Robert , [Effect of sucrose treatment on root, shoot and tuber formation of vine cuttings of yams (Dioscorea spp.)] , Effect of sucrose treatment on root, shoot and tuber formation of vine cuttings of yams (Dioscorea spp.)

Journal Article 2007

Comparative effects of explants sources and age of plant on rooting, shooting and tuber formation of vine cuttings of yams (Dioscorea spp.)

Autor: Kikuno, H. Matsumoto, R. Shiwachi, H. Toyohara, H. Asiedu, Robert

Enlace original: https://cgspace.cgiar.org/handle/10568/93023

Investigación en Agricultura

YAMS

DIOSCOREA

PROPAGATION

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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.)

Journal Article 2008

Enhancing offseason yam production in Nigeria

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

Yam cultivation in dry season was tested in the farmer’s field at inland valley in Niger state, Nigeria. Water yam (Dioscorea alata) variety TDa 95/00328 had the greater response to the gibberellin inhibitor prohexadione-calcium (PC). The sprouting period of PC treated tuber was 21 – 27 days at D...

Enlace original: https://cgspace.cgiar.org/handle/10568/90795

Investigación en Agricultura

DIOSCOREA ALATA

DORMANCY

GIBBERELLIN INHIBITORS

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Shiwachi, H. , Kikuno, H. , Fashola, R. , Asiedu, Robert , [Enhancing offseason yam production in Nigeria] , Enhancing offseason yam production in Nigeria

Journal Article 2003-09

Influence of exogenous gibberellins inhibitors on tuber sprouting in yam

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

To induce sprouting two gibberellin inhibitors, uniconazole-P (UP) and prohexadione-calcium (PC), were applied to foliage of white Guinea yam (Dioscorea rotundata) and water yam (D. alata) 30 days before harvest or to tubers at harvest. The tuber sprouting period was shortened by about 35 days in...

Enlace original: https://cgspace.cgiar.org/handle/10568/96360

Investigación en Agricultura

YAMS

DIOSCOREA ROTUNDATA

DIOSCOREA ALATA

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Shiwachi, H. , Ayankanmi, T.G. , Asiedu, Robert , Onjo, M. , [Influence of exogenous gibberellins inhibitors on tuber sprouting in yam] , Influence of exogenous gibberellins inhibitors on tuber sprouting in yam

Journal Article 2004

Comparative effects of explant source and genotype on in vitro tuberization in Dioscorea alata and D. rotundata

Autor: Balogun, M.O. Ng, S.Y. Shiwachi, H. Ng, N.Q. Fawole, I.

Single node cuttings of two genotypes each of Dioscorea alata and D. rotundata from both plants grown in screen houses and in vitro plantlets were cultured in a tuberization medium. The screen house explants had significantly higher plantlet tuberization and primary nodal complex formation, and m...

Enlace original: https://cgspace.cgiar.org/handle/10568/103297

Investigación en Agricultura

DIOSCOREA

EXPLANTS

GENOTYPES

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Balogun, M.O. , Ng, S.Y. , Shiwachi, H. , Ng, N.Q. , Fawole, I. , [Comparative effects of explant source and genotype on in vitro tuberization in Dioscorea alata and D. rotundata] , Comparative effects of explant source and genotype on in vitro tuberization in Dioscorea alata and D. rotundata

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