A better knowledge of traditional cultivars is a prerequisite to overcoming the various constraints of yam production in Benin. Using IPGRI's descriptors, 560 accessions of cultivated yams (D. cayenensis Lam./D. rotundata Poir. complex) collected throughout Benin, were characterised. Ninety morph...
Dansi, A.
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Mignouna, H.D.
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Zoundjihékpon, J.
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Sangare, A.
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Asiedu, Robert
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Quin, F.M.
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[Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscorea cayenensis/D. rotundata) complex in Benin Republic]
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Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscorea cayenensis/D. rotundata) complex in Benin Republic
Based upon IBPGR (IPGRI) morphologic descriptors, 560 accessions of Benin Republic's cultivated yams (Dioscorea ccayenensis/Dioscorea rotundata complex were morphologically characterized. Ninety morphotypes were identified and accessions were classified into 26 varietal groups according to their ...
Striga aspera and Striga hermonthica are recognized as separate species, but their close morphological similarity causes difficulty in distinguishing between them in areas where they coexist in Africa. In this study, crosses between the species were made using randomly selected morphologically ty...
Aigbokhan, E.I.
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Berner, D.K.
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Musselman, L.J.
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Mignouna, H.D.
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[Evaluation of variability in Striga aspera, Striga hermonthica and their hybrids using morphological characters and random amplified polymorphic DNA markers]
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Evaluation of variability in Striga aspera, Striga hermonthica and their hybrids using morphological characters and random amplified polymorphic DNA markers
Anthracnose, caused by Colletotrichum gloeosporioides, is the most severe foliar disease of water yam (Dioscorea alata) worldwide. The tetraploid breeding line, TDa 95/00328, is a source of dominant genetic resistance to the moderately virulent fast growing salmon (FGS) strain of C. gloeosporioid...
Mignouna, H.D.
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Abang, Mathew M.
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Onasanya, A.
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Agindotan, A.
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Asiedu, Robert
,
[Identification and potential application of RAPD markers for anthracnose resistance in water yam (Dioscorea alata)]
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Identification and potential application of RAPD markers for anthracnose resistance in water yam (Dioscorea alata)
Resistance to Yam mosaic virus (YMV) in tetraploid white yam (Dioscorea rotundata) is inherited differentially as a dominant and recessive character. Elite D. rotundata breeding lines with durable resistance to YMV can be developed by pyramiding major dominant and recessive genes using marker ass...
Mignouna, H.D.
,
Abang, Mathew M.
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Onasanya, A.
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Agindotan, B.
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Asiedu, Robert
,
[Identification and potential use of RAPD markers linked to yam mosaic virus resistance in white yam (Dioscorea rotundata)]
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Identification and potential use of RAPD markers linked to yam mosaic virus resistance in white yam (Dioscorea rotundata)
A genetic linkage map of the tetraploid water yam (Dioscorea alata L.) genome was constructed based on 469 co-dominantly scored amplified fragment length polymorphism (AFLP) markers segregating in an intraspecific F1 cross. The F1 was obtained by crossing two improved breeding lines, TDa 95/00328...
Mignouna, H.D.
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Mank, R.A.
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Ellis, T.H.N.
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Bosch, N.V.D.
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Asiedu, Robert
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Abang, Mathew M.
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Peleman, J.
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[A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance]
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A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance
Using IPGRI's descriptors, 45 accessions of Guinea yams (Dioscorea cayenensis Lam./ Dioscorea rotundata Poir. complex) collected in Cameroon were classified into six cultivar groups based on their morphological similarities. An identification key is proposed for the cultivar groups. Six enzymatic...
Mignouna, H.D.
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Dansi, A.
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Zok, S.
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[Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of Cameroon]
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Morphological and isozymic diversity of the cultivated yams (Dioscorea cayenensis/Dioscorea rotundata complex) of Cameroon
Water yam (Dioscorea alata L.) is the most widely cultivated yam species globally. The major limitation to the profitable and sustainable production of D. alata is its susceptibility to anthracnose disease. The availability of resistant varieties could potentially form the cornerstone of an integ...
Abang, Mathew M.
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Winter, S.
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Mignouna, H.D.
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Green, K.R.
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Asiedu, Robert
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[Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease]
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Molecular taxonomic, epidemiological and population genetic approaches to understanding yam anthracnose disease
This protocol describes how to produce yam (Dioscorea) seeds through controlled pollination of flowers on female plants. Pollination by flower thrips takes place naturally in normal yam-growing environments in the presence of flowering male and female genotypes, although it is not efficient. This...
Mignouna, H.D.
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Abang, Mathew M.
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Asiedu, Robert
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Geeta, R.
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[Culturing meristematic tissue and node cuttings from yams (Dioscorea)]
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Culturing meristematic tissue and node cuttings from yams (Dioscorea)