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The genus Vigna comprises seven subgenera and sixteen sections. Cowpea, Vigna tingnicnlatti (L.) Walp.. is an important grain legume crop in sub-Saharan Africa and belongs to the subgenus Vigna. section Ctitiang. Morphologically, cowpea genotypes appear very variable. However, a high level of gen...


Fatokun, C.A.Perrino, P.Ng, N.Q.[Wide crossing in African Vigna species]Wide crossing in African Vigna species

Knowledge of the genetic relationships and variability among cultivated germplasm is important for facilitating the transfer of useful genes and maximizing the use of available germplasm resources. In this study, random amplified polymorphic DNA (RAPD) markers were used to assess genetic diversit...


Mignouna, H.D.Ng, N.Q.Ikea, J.Thottappilly, G.[Genetic diversity in cowpea as revealed by random amplified polymorphic DNA]Genetic diversity in cowpea as revealed by random amplified polymorphic DNA

Flavonoid chemical markers together with other biochemical markers and/or morphological data can provide useful characters for defining species in Vigna genus. In this paper flavonoid HPLC fingerprints have been utilized to assess taxonomic relationships amongst species and accessions of Vigna.Wi...


Lattanzio, V.Cardinali, A.Linsalata, V.Perrino, P.Ng, N.Q.[A Chemosystematic study of the flavonoids of Vigna]A Chemosystematic study of the flavonoids of Vigna

The genetics of resistance to rice yellow mottle sobemovirus (RYMV) in O. glaberrima was studied in a 6 parent full diallel cross involving 4 resistant and 2 susceptible genotypes. F1 hybrids resulting from crosses between resistant and susceptible genotypes were susceptible. Susceptibility was c...


Paul, C.Ng, N.Q.Ladeinde, T.A.[Diallel analysis of resistance to rice yellow mottle virus in African rice Oryza glabelrrima Steud]Diallel analysis of resistance to rice yellow mottle virus in African rice Oryza glabelrrima Steud

Early embryogenesis up to 8 days after pollination was characterized in V. unguiculata. When crosses were performed between V. unguiculata and wild V. vexillata, seeds were not obtained due to crossability barriers. In most cases pollen tube growth was arrested in the stigmatic tissue. In the 15-...


Barone, A.Ng, N.Q.[Embryological study of crosses between Vigna unguiculata and V. vexillata]Embryological study of crosses between Vigna unguiculata and V. vexillata
Goli, A.E.Begemann, F.Ng, N.Q.[Germplasm diversity in bambara groundnut and prospects for crop improvement]Germplasm diversity in bambara groundnut and prospects for crop improvement
Autor: Ng, N.Q.

The history of the Genetic Resources Unit at the International Institute of Tropical Agriculture (IITA) was highlighted. By 1980, the unit engaged in characterization and evaluation of germplasm information. In order to strengthen the units activity and provide a better knowledge of Vigna, the go...


Ng, N.Q.[Recents developments in cowpea germplasm collection, conservation, evaluation and research at the Genetic Resources Unit]Recents developments in cowpea germplasm collection, conservation, evaluation and research at the Genetic Resources Unit

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