Journal and Journal Articles: Recent submissions

Now showing items 1061-1080 of 5157

    • Evaluation of nutritional properties of cassava-legumes snacks for domestic consumption: consumer acceptance and willingness to pay in Zambia 

      Alamu, E.O.; Maziya-Dixon, B.; Olaniyan, B.; Ntawuruhunga, P.; Chikoye, D. (2020-08-25)
      High-quality cassava flour (HQCF) is a cheaper alternative to wheat in the production of snacks. This study assessed the nutritional properties and consumer acceptability of cassava-legume snacks in Zambia. Cassava snacks were made from 100% HQCF, 50:50 cassava-soybean flour blend, 50:50 cassava-cowpea flour blend and 100% wheat flour as the control. The samples were analyzed for nutritional, functional and anti-nutritional properties using standard laboratory methods. Also, a well-outlined ...

    • Genome-wide association analyses reveal the genetic basis of biomass accumulation under symbiotic nitrogen fixation in African soybean 

      Torkamaneh, D.; Chalifour, F.P.; Beauchamp, C.J.; Agrama, H.; Boahen, S.; Maaroufi, H.; Rajcan, I.; Belzile, F. (2020)
      Symbiotic nitrogen fixation (SNF) increases sustainability by supplying biological nitrogen for crops to enhance yields without damaging the ecosystem. A better understanding of this complex biological process is critical for addressing the triple challenges of food security, environmental degradation, and climate change. Soybean plants, the most important legume worldwide, can form a mutualistic interaction with specialized soil bacteria, bradyrhizobia, to fix atmospheric nitrogen. Here we report ...

    • Genome-wide association study of Striga resistance in early maturing white tropical maize inbred lines 

      Adewale, S.A.; Badu-Apraku, B.; Akinwale, R.O.; Agre, A.P.; Gedil, M.; Garcia-Oliveira, A.L. (2020)
      Background: Striga hermonthica (Benth.) parasitism militates against increased maize production and productivity in savannas of sub-Saharan Africa (SSA). Identification of Striga resistance genes is important in developing genotypes with durable resistance. So far, there is only one report on the existence of QTL for Striga resistance on chromosome 6 of maize. The objective of this study was to identify genomic regions significantly associated with grain yield and other agronomic traits under ...

    • Genome-wide association analysis reveals new insights into the genetic architecture of defensive, agro-morphological and quality-related traits in cassava 

      Rabbi, I.Y.; Kayondo, S.I.; Bauchet, G.; Yusuf, M.; Aghogho, C.I.; Ogunpaimo, K.; Uwugiaren, R.; Smith, I.A.; Peteti, P.; Agbona, A.; Parkes, E.; Ezenwaka, L.; Wolfe, M.; Jannink, J.L.; Egesi, C.; Kulakow, P. (2020)
      Cassava (Manihot esculenta) is one of the most important starchy root crops in the tropics due to its adaptation to marginal environments. Genetic progress in this clonally propagated crop can be accelerated through the discovery of markers and candidate genes that could be used in cassava breeding programs. We carried out a genome-wide association study (GWAS) using a panel of 5,310 clones developed at the International Institute of Tropical Agriculture - Nigeria. The population was genotyped at ...

    • Genetic diversity and population structure of maize inbred lines with varying levels of resistance to striga hermonthica using agronomic trait-based and SNP markers 

      Stanley, A.; Menkir, A.; Agre, P.; Ifie, B.; Tongoona, P.; Unachukwu, N.; Meseka, S.; Mengesha Abera, W.; Gedil, M. (2020)
      Striga hermonthica is a serious biotic stress limiting maize production in sub-Saharan Africa. The limited information on the patterns of genetic diversity among maize inbred lines derived from source germplasm with mixed genetic backgrounds limits the development of inbred lines, hybrids, and synthetics with durable resistance to S. hermonthica. This study was conducted to assess the level of genetic diversity in a panel of 150 diverse maize inbred lines using agronomic and molecular data and ...

    • A review of varietal change in roots, tubers and bananas: consumer preferences and other drivers of adoption and implications for breeding 

      Thiele, G.; Dufour, D.; Vernier, P.; Mwanga, R.O.; Parker, M.L.; Schulte- Geldermann, E.; Teeken, B.; Assfaw Wossen, T.; Gotor, E.; Kikulwe, E.; Tufan, H.; Sinelle, S.; Kouakou, A.M.; Friedmann, M.; Polar, V.; Hershey, C. (2020)
      This review of the literature on varietal change in sub‐Saharan Africa looks in detail at adoption of new varieties of bananas in Uganda, cassava in Nigeria, potato in Kenya, sweetpotato in Uganda and yams in Côte d’Ivoire. The review explored three hypotheses about drivers of varietal change. There was a strong confirmation for the hypothesis that insufficient priority given to consumer‐preferred traits by breeding programmes contributes to the limited uptake of modern varieties (MVs) and low ...

    • Quality requirements in natural enemies used for inoculative release: Practical experience from a successful biological control programme 

      Neuenschwander, P.; Haug, T.; Ajounu, O.; Davis, H.; Akinwumi, B.; Madojemu, E. (1989)
      During the past six years, the South-American encyrtid wasp Epidinocarsis lopezi (De Santis) was released from the ground and from the air in about 100 areas in Africa for the biological control of the cassava mealybug (CM) Phenacoccus manihoti Mat.-Ferr. It was established in all release sites and, in 1988, occurred in 18 African countries over 1.5 mio. km2. Its efficiency in permanently reducing CM populations has been documented. E. lopezi was reared on its original host plant, cassava, and on ...

    • Chemical and sensory properties of analogue rice produced from maize grits and high quality cassava flour blends 

      Karim, O.R.; Olapade, G.; Awoyale, W.; Maziya-Dixon, B.; Oyeyinka, S.; Olawuyi, I. (2017)
      In order to reduce the large quantity of rice imported into Nigeria on a yearly basis, there is the need to get an alternative food that resembles rice to meet domestic requirement and food diversification. This work was therefore designed to determine the chemical, functional and sensory properties of analogue rice (ARC) produced from five blends of maize grits and high quality cassava flour (HQCF) using standard methods. The sensory qualities and consumer acceptability of the ARC were compared ...

    • Using a participatory theory driven evaluation approach to identify causal mechanisms in innovation processes 

      Blundo‐Canto, G.; Devaux‐Spatarakis, A.; Mathé, S.; Faure, G.; Cerdan, C. (2020-10)
      Applied agricultural research institutes play different roles in complex agricultural innovation processes, contributing to them with other actors. To foster learning and usable knowledge on how research actions influence such lasting innovation processes, there is a need to identify the causal mechanisms linking these actions and the effects of the changes they enable. A participatory, theory‐driven, ex‐post evaluation method, ImpresS, was developed by the French Agricultural Research Center for ...

    • Physiological response of soybean [Glycine max L. Merril] genotypes to drought-induced stress: preliminary screening for drought under south sudan agro-ecological (Ironstone/Mountains) conditions 

      Gama, P.B.S.; Vuga, A.J.; Chigeza, G. (2020-03)
      Drought stress is a major environmental factor that adversely limits the growth and the production of crops. In order to screen 18 soybean genotypes, an experiment was conducted in University of Juba, (CNRES), Department of Agricultural Sciences Experimental Unit with an objective of screening 18 soybean accessions/genotypes for drought tolerance at two separate experiments (non-drought stress and drought stress sites) based on randomized complete block design (RCBD) with three replications. The ...

    • Quantification of the aflatoxin biocontrol strain Aspergillus flavus AF36 in soil, and nuts and leaves of pistachio by real-time PCR 

      Garcia-Lopez, M.T.; Luo, Y.; Ortega-Beltran, A.; Jaime, R.; Moral, J.; Michailides, T. (2020-10)
      The species Aspergillus flavus and A. parasiticus are commonly found in the soils of nut-growing areas in California. Several isolates can produce aflatoxins that occasionally contaminate nut kernels conditioning their sale. The strain AF36 of A. flavus, which does not produce aflatoxins, is registered as a biocontrol agent for use in almond, pistachio, and fig crops in California. After application in the orchards, AF36 displaces aflatoxin-producing Aspergillus spp. and thus reduces aflatoxin ...

    • Variability of provitamin A carotenoids in plantain: influence of cultivar, bunch type, maturation stage, and location 

      Udomkun, P.; Masso, C.; Swennen, R.; Assfaw Wossen, T.; Amah, D.; Fotso Kaute, A.; Lienou, J.; Adesokan, M.; Njukwe, E.; Vanlauwe, B. (2020)
      In this study, the effect of ripening stage (R), cultivar (C), bunch type (T), and location (L) on the variability of provitamin A carotenoids (pVACs) in 16 plantain cultivars grown in Cameroon and Gabon was investigated. For the sixteen plantain cultivars, fruits were collected at stages 1 (unripe), 5 (ripe), and 7 (overripe) from three different bunch types (French, False Horn, and True Horn) across 13 locations in Cameroon and Gabon. For all cultivars, the highest concentration of carotenoids ...

    • Identification of early and extra-early maturing tropical maize inbred lines resistant to Exserohilum turcicum in sub-Saharan Africa 

      Badu-Apraku, B.; Bankole, F.A.; Ajayo, B.S.; Fakorede, M.A.B.; Akinwale, R.O.; Talabi, A.O.; Bandyopadhyay, R.; Ortega-Beltran, A. (2021-01)
      Northern corn leaf blight (NCLB) incited by the fungus Exserohilum turcicum is a foliar disease that significantly limits maize production and productivity in West and Central Africa (WCA), particularly in the mid-altitudes but during the last decade it has become a menace in lowland agro-ecologies. The most economical and environmentally friendly disease management strategy is the cultivation of maize varieties resistant or tolerant to NCLB. However, no early maturing (EM) and extra-early maturing ...

    • Living income benchmarking of rural households in low-income countries 

      van de Ven, G.W.; de Valença, A.; Marinus, W.; de Jager, I.; Descheemaeker, K.K.; Hekman, W.; Mellisse, B.T.; Baijukya, F.; Omari, M.; Giller, K. (2020)
      The extreme poverty line is the most commonly used benchmark for poverty, set at US$ 1.90 by the World Bank. Another benchmark, based on the Anker living wage methodology, is the remuneration received for a standard work week necessary for a worker to meet his/her family’s basic needs in a particular place. The living wage concept has been used extensively to address incomes of plantation workers producing agricultural commodities for international markets. More recently intense discussion has ...

    • Variability of provitamin A carotenoids in plantain: influence of cultivar, bunch type, maturation stage, and location 

      Udomkun, P.; Masso, C.; Swennen, R.; Wossen, T.; Amah, D.; Fotso, A.; Lienou, J.; Adesokan, M.; Njukwe, E.; Vanlauwe, B. (2020-12)
      In this study, the effect of ripening stage (R), cultivar (C), bunch type (T), and location (L) on the variability of provitamin A carotenoids (pVACs) in 16 plantain cultivars grown in Cameroon and Gabon was investigated. For the sixteen plantain cultivars, fruits were collected at stages 1 (unripe), 5 (ripe), and 7 (overripe) from three different bunch types (French, False Horn, and True Horn) across 13 locations in Cameroon and Gabon. For all cultivars, the highest concentration of carotenoids ...

    • Tectonics, climate and the diversification of the tropical African terrestrial flora and fauna 

      Couvreur, T.L.P.; Dauby, G.; Blach-Overgaard, A.; Deblauwe, V.; Dessein, S.; Droissart, V.; Hardy, O.J.; Harris, D.J.; Janssens, S.B.; Ley, A.C.; Mackinder, B.A.; Sonké, B.; Sosef, M.S.M.; Stévart, T.; Svenning, J.C.; Wieringa, J.J.; Faye, A.; Missoup, A.D.; Tolley, K.A.; Nicolas, V.; Ntie, S.; Fluteau, F.; Robin, C.; Guillocheau, F.; Barboni, D.; Sepulchre, P. (2020)
      Tropical Africa is home to an astonishing biodiversity occurring in a variety of ecosystems. Past climatic change and geological events have impacted the evolution and diversification of this biodiversity. During the last two decades, around 90 dated molecular phylogenies of different clades across animals and plants have been published leading to an increased understanding of the diversification and speciation processes generating tropical African biodiversity. In parallel, extended geological ...

    • Investigating manual sprout removal in stored yam: effect of tuber sizes on some physicochemical properties 

      Etudaiye, H.A.; Uvere, P.O.; Rees, D.; Abayomi, L.; Westby, A.; Maroya, N.G.; Ukpabi, U.J. (2020)
      The study focused on manual sprout removal and effect of tuber sizes on some physicochemical properties of the stored yams. Yam variety, Ameh (Dioscorea rotundata) with different tuber sizes ≤ 0.5 Kg, 0.6-0.9 Kg and ≥ 1.0 Kg for small (SS), medium (MS) and big(BS) sizes, respectively, were used. The primary nodal complex (PNC) was removed using three methods: hand picking, half cutting and full cutting. Tubers were stored on shelves for 16 weeks in a yam storage laboratory at National Root Crops ...

    • Validation of a roadmap for mainstreaming nutrition-sensitive interventions at state level in Nigeria 

      Ezekannagha, O.; Drimie, S.; Von Fintel, D.; Maziya-Dixon, B.; Mbhenyane, X. (2020)
      Background National programs are often developed with little consideration to the sub-national local factors that might affect program success. These factors include political support, capacity for implementation of program and variation in malnutrition indices being tackled. State context factors are evident in the distribution of malnutrition (e.g. high prevalence or gap among Local Government Areas), in the implementation of nutrition-sensitive interventions (e.g. access to early childhood ...

    • Antagonistic effects of biocontrol agents against Phytophthora infestans and growth stimulation in tomatoes 

      Kariuki, W.G.; Mungai, N.W.; Otaye, D.O.; Thuita, M.; Muema, E.; Korir, H.; Masso, C. (2020)
      Late blight disease is a major cause of economic losses in tomato (Lycopersicon esculentum L.) production in eastern Africa. The objective of this study was to evaluate the efficacy of Trichoderma species in controlling late blight disease and their role on the growth of tomato. Trichoderma asperellum and T. harzianum were isolated from two commercial products containing the antagonistic species. Culture-based and molecular approaches, genomic DNA isolation and amplification, using ITS1 and ITS4 ...

    • Nitrogen fertilizer equivalence of black soldier fly frass fertilizer and synchrony of nitrogen mineralization for maize production 

      Beesigamukama, D.; Mochoge, B.; Korir, N.; Musyoka, M.W.; Fiaboe, K.; Nakimbugwe, D.; Khamis, F.M.; Subramanian, S.; Dubois, T.; Ekesi, S.; Tanga, C.M. (2020)
      The use of black soldier fly frass fertilizer (BSFFF) is being promoted globally. However, information on nitrogen (N) fertilizer equivalence (NFE) value and synchrony of N mineralization for crop production remains largely unknown. Comparative studies between BSFFF and commercial organic fertilizer (SAFI) were undertaken under field conditions to determine synchrony of N release for maize uptake. The BSFFF, SAFI, and urea fertilizers were applied at the rates of 0, 30, 60, and 100 kg N ha−1. The ...