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The objective of this study was to quantify the effect of photoperiod on the duration from vine (shoot) emergence to flowering in white or Guinea yam (Dioscorea rotundata). The duration from vine emergence to flowering in two clonal varieties of yam (TDr 131 and TDr 99-9) was recorded at 10 diffe...


Ile, E.I.Craufurd, Peter Q.Asiedu, RobertBattey, N.H.[Duration from vine emergence to flowering suggests a longday or rate of change of photoperiod response in white yam (Dioscorea rotundata Poir)]Duration from vine emergence to flowering suggests a longday or rate of change of photoperiod response in white yam (Dioscorea rotundata Poir)
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.)
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.)

Root colonization by arbuscular mycorrhiza (AM) enhances nutrient acquisition by plants and could benefit the production of yam (Dioscorea spp.). The variation in AM colonization in yam genotypes was evaluated in two experiments at four locations (Ibadan, Onne, Abuja and Ubiaja) in different agro...


Dare, M.O.Abaidoo, R.C.Fagbola, O.Asiedu, Robert[Genetic variation and genotype x environment interaction in yams (Dioscorea spp.) for root colonization by arbuscular mycorrhiza]Genetic variation and genotype x environment interaction in yams (Dioscorea spp.) for root colonization by arbuscular mycorrhiza

Use of genetic resistance is the most practical and economic way to manage major diseases of yams. In a search for sources of resistance, 40 water yam (Dioscorea alata L.) accessions from Benin, Ghana, Nigeria and Puerto Rico were screened under natural disease infection conditions in Ibadan, Nig...


Egesi, Chiedozie N.Odu, B.Ogunyemi, S.Asiedu, RobertHughes, J.[Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield]Evaluation of water yam (Dioscorea alata L.) germplasm for reaction to yam anthracnose and virus diseases and their effect on yield

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...


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

Colletotrichum gloeosporioides causes anthracnose, the most severe foliar disease of field-grown water yam (Dioscorea alata). The inheritance of resistance to a moderately virulent (FGS) strain of the pathogen was investigated in crosses between tetraploid D. alata genotypes: TDa 95/00328 (resist...


Mignouna, H.D.Abang, Mathew M.Green, K.R.Asiedu, Robert[Inheritance of resistance in water yam (Disocorea alata) to anthracnose (Colletotrichum gloeosporioides)]Inheritance of resistance in water yam (Disocorea alata) to anthracnose (Colletotrichum gloeosporioides)

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...


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

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...


Shiwachi, H.Ayankanmi, T.G.Asiedu, RobertOnjo, 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

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