Books and Book Chapters: Recent submissions

Now showing items 281-300 of 983

    • Strategic research in heterogenous mandate areas: an example from the West African Savanna 

      Smith, J.; Weber, G. (1994)

    • Post transcriptional gene silencing in transgenic plants 

      Carvalho Balieiro, F. de; Boerjan, W.; Ingelbrecht, I.; Depicker, A.; Inze, D.; Montagu, M. van (1994)
      The recent successes of gene engineering in plants demonstrate the high potential of expressing transgenes in agronomically important crops. These approaches require that the introduced gene is stably expressed in subsequent plant generations. However, experiments involving transgenic plants show that the expression of chimeric genes can substantially vary among individual transformants.

    • Banana and plantain breeding 

      Ortiz, R.; Ferris, R.S.B.; Vuylsteke, D. (1995)
      Despite considerable efforts of Musa improvement programmes, banana and plantain production still depends upon a limited number of landraces selected by man from the natural germplasm. Inability to replace land-races by cultivars obtained through cross-breeding creates the increased risk of epidemic disease among genetically similar cultivars. Consequently, improvement programmes have concentrated almost exclusively on resistance breeding.

    • Musa genetics 

      Ortiz, R. (1995)
      The triploid nature of plantain and its pattern of inheritance should have represented a challenge and an incentive for geneticists. However, few genetic and cytological investigations have been done in Musa spp. Both banana and plantain have been ignored and neglected as material for basic genetic research.

    • Guide to soybean production in Borno State, Nigeria 

      Onyibe, J.E.; Kamara, A.Y.; Omoigui, L.O. (2006)

    • Soil fertility management and cowpea production in the semi arid tropics of West Africa 

      Bationo, A.; Ntare, B.R.; Tarawali, S.A.; Tabo, R. (2002)
      Cowpea (Vigna unguiculata[L.] Walp.) is an important grain legume in the semi- arid zone of West Africa as it is a major source of dietary protein for the people. It is usually grown as an intercrop with the major cereals, namely millet and sorghum. Despite its importance, its yields are very low due to several constraints including poor soil, insect pests, and drought. The soils in semiarid West Africa are inherently low in nitrogen and phosphorus. Soil, water, and nutrient management practices ...

    • Cowpea rotation as a resource management technology for cerealbased systems in the savannas of West Africa 

      Carsky, J.R.; Vanlauwe, Bernard; Lyasse, O. (2002)
      A synthesis of results from the savanna zone of West Africa suggests that cowpea rotation can be considered to be an effective resource management technology in cereal-based systems. Part of the N requirement of cereal crops can be satisfied by cowpea crop rotation. Furthermore, benefits of cowpea rotation are sometimes higher than expected based on the N content of the cowpea crop alone. Reasons for this include substantial root biomass and N, substantial N-sparing by the legume, and other benefits ...

    • Biotechnological approaches to plantain and banana improvement at IITA 

      Vuylsteke, D.; Swennen, R. (1992)
      Plantains and bananas are an important staple food crop in developing countries. Genetic improvement programmes have been spurred by the rapid spread of black sigatoka disease, but the genus Musa is intractable in terms of conventional breeding strategies. The potential ofbiotechnology in banana and plantain improvement may therefore be considerable. Simple tissue culture techniques, such as shoot-tip culture and embryo culture, can overcome some of the obstacles impeding breeding progress. These ...

    • Isozyme analysis and its application in plant breeding 

      Asiedu, Robert (1992)
      Plant breeders face the difficult task of having to select for traits that are often under complex genetic control and subject to edapho-climatic influences. Electrophoresis of protein extracts from plant tissue, using different kinds ofsupport media and buffer systems, allows separation of the multiple forms ofenzymes (isozymes) on the basis of charge and/or molecular size. The resulting polymorphisms are useful as genetic markers. Isozyme analysis is a powerful technique for estimating genetic ...

    • Status of wide crosses in cassava and yam 

      Asiedu, Robert; Bai, K.V.; Terauchi, R.; Dixon, Alfred G.O.; Hahn, S.K. (1992)
      Wild relatives of cassava (Manihot spp.) and yam (Dioscorea spp.) have many attributes of importance to the genetic improvement of the cultivated species. Some crosses between cassava and its wild relatives have led to poly ploids (crosses to M. />laziovii and M. epruinosa) and resistance to two major diseases, cassava mosaic virus and cassava bacterial blight (crosses to M. glaziovii). No barriers to interspecific hybridization have been found in the genus Manihot, but hybridization between ...

    • Evaluation of a novel technique for screening cowpea varieties for resistance to the seed beetle Callosobruchus maculatus 

      Deverau, A.D.; Jackai, L.E.N.; Olusegun, T.B.; Asiwe, A.N.J. (2002)
      A novel method for screening cowpea varieties for resistance to the postharvest insect pest Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) was compared to conventional screening techniques at the International Institute for Tropical Agriculture (IITA) laboratory in Ibadan, Nigeria. The new technique assesses seed resistance by measuring larval feeding activity via electronic sensors. Initial smallscale trials demonstrated that the method could be successfully applied in the laboratory with ...

    • Recent advances in research on cowpea diseases 

      Emechebe, A.M.; Lagoke, S.T.O. (2002)
      Cowpea diseases induced by various pathogenic groups (fungi, bacteria, viruses, nematodes, and parasitic flowering plants) constitute one of the most important constraints to cowpea production in all agroecological zones where the crop is grown. This paper presents an overview of the major research findings on cowpea diseases since the 1995 World Cowpea Conference. The focal points include con sideration of the present state of scientific knowledge of these diseases with special emphasis on new ...

    • Agricultural transformation and fertilizer use in the cerealbased systems of the northern Guinea savanna 

      Manyong, Victor M.; Makinde, K.O.; Ogungbile, A.G.O. (2002)

    • Wide crosses of Vigna food legumes 

      Ng, N.Q. (1992)
      Many successful wide crosses among Asiatic cultivated Vigna species and between them and a wild species, V. trilobata, have been reported However, despite many attempts to cross the African cultivated Vigna species with wild Vigna species and the Asiatic cultivated Vigna species, there has been no success as yet. Nevertheless, crosses between cultivated and wild subspecies of V. unguiculata were fairly easy and their hybrids are fertile. Studies conducted at the International Institute of Tropical ...

    • Sorghum on line crop information 

      Mahalakshmi, V.; Reddy, B.V.S.; Bandyopadhyay, Ranajit; Sharma, H.C.; Rao, N.K.; Ortiz, R. (2002)

    • Diseases of sorghum and pearl millet in Asia 

      Indira, S.; Xu, X.; Iamsupasit, N.; Shetty, H.S.; Vasanthi, N.S.; Singh, S.D.; Bandyopadhyay, Ranajit (2002)

    • An overview of sorghum viruses in Asia and Africa 

      Leslie, J.; Navi, S.; Narayana, Y.; Bandyopadhyay, Ranajit; Muniyappa, V. (2002)

    • Micropropagation of white yam (Dioscorea rotundata Poir.) 

      Ng, S.Y.C. (1992)
      White yam (Dioscorea rotundata Poir.) belongs to the family Dioscoreaceae, genus Dioscorea. It is also known as white Guinea yam, Guinea yam, and 8-months' yam. The center of origin of white yam is in West Africa. D. rotundata, a cultigen, is so close to D. cayenensis that it has been regarded as a subspecies. It belongs to section Enantiophyllum, which comprises the most economically useful species of Dioscorea. D. rotundata appears to be of hybrid origin. It was speculated by Coursey (1976) that ...

    • Breeding cowpea for resistance to insect pests: attempted crosses between cowpea and Vigna vexillata 

      Fatokun, C.A. (2002)
      Cowpea is grown mainly for its protein-rich grains, which is consumed in various forms in sub-Saharan Africa. Average grain yield in farmers' fields is generally low due to a number of biotic and abiotic stresses. The most important of the biotic stress factors causing extensive grain yield losses in cowpea are post flowering insect pests such as the legume pod borer and pod sucking bugs. Availability of varieties with resistance to these pests will be attractive to cowpea farmers as the crop could ...

    • Weed control in cassava farms 

      Melifonwu, A.; James, B.; Aihou, K.; Weise, S.; Awah, E.; Gbaguidi, B. (2000)