Journal and Journal Articles: Recent submissions

Now showing items 101-120 of 5157

    • Exploiting the genetic potential of cowpea in an intercropping complex 

      Ongom, P.O.; Fatokun, C.; Togola, A.; Mohammed, S.B.; Ishaya, D.J.; Bala, G.; Popoola, B.; Mansur, A.; Tukur, S.; Ibikunle, M.; Abdulkazeem, B.; Boukar, O. (2023)
      In the West African sub-region, intercropping is a critical element in cowpea product profiles. This study aimed to investigate the impact of intercropping cowpea with pearl millet on genetic correlations, heritability, and response to selection. Thirty-five cowpea genotypes and one pearl millet variety were used to create three cropping patterns: sole cowpea, 1:1 (one row of millet to one row of cowpea), and 2:4 (two rows of millet to four rows of cowpea). Split-plot experiments were conducted ...

    • Recent advances in cowpea IPM in West Africa 

      Togola, A.; Datinon, B.; Laouali, A.; Traoré, F.; Agboton, C.; Ojo, J.A.; Ongom, P.O.; Pittendrigh, B.R.; Boukar, O.; Tamo, M. (2023)
      Cowpea is an important and climate-resilient grain legume for human and livestock nutrition worldwide. Its grains represent a valuable source of protein for rural families in Sub-Saharan Africa while its haulms offer nutritious fodder for livestock, especially, in the Sahel regions. Cowpea production, unfortunately, faces substantial challenges of field and storage insect pests which can cause up to 100% losses. The use of synthetic pesticides, although providing farmers with a good level of pest ...

    • Exploring phenotypic variation of diverse bambara groundnut (Vigna subterranea L) origin and development of mini-core collection for future breeding 

      Uba, C.U.; Oselebe, H.O.; Abebe, A.T.; Mekonen, G.S.; Abtew, W.G. (2023-04-12)
      Understanding the phenotypic variation and designing a mini-core collection is an efficient method to accelerate the genetic gain of bambara groundnut. A collection of 300 bambara groundnut landraces from 25 different countries of origin sourced from gene banks were used to analyze phenotypic variability among the landraces and develop a mini-core collection for future breeding. The landraces were evaluated in alpha lattice design with two replications for 2 years (2019 and 2020). The results ...

    • Unravelling marker trait associations linking nutritional value with pigmentation in rice seed 

      Mbanjo, E.; Pasion, E.; Jones, H.; Carandang, S.; Misra, G.; Ignacio, J.C.; Kretzschmar, T.; Sreenivasulu, N.; Boyd, L.A. (2023)
      While considerable breeding effort has focused on increasing the yields of staple crops such as rice and the levels of micronutrients such as iron and zinc, breeding to address the problems of the double-burden of malnutrition has received less attention. Pigmented rice has higher nutritional value and greater health benefits compared to white rice. However, the genetic associations underlying pericarp coloration and accumulation of nutritionally valuable compounds is still poorly understood. Here ...

    • The combining ability of extra-early maturing quality protein maize (Zea mays) inbred lines and the performance of their hybrids in Striga-infested and low-nitrogen environments 

      Okunlola, G.; Badu-Apraku, B.; Ariyo, O.; Ayo-Vaughan, M. (2023-10-10)
      Maize production in sub-Saharan Africa (SSA) faces challenges due to the damage caused by the parasitic weed, Striga hermonthica (Del.) Benths and low soil nitrogen. To address these constraints and improve food security and nutrition, this study assessed the combining ability of 47 inbred lines and four testers, grouped them into heterotic groups, identified effective testers, and determined the stability of the lines in hybrid combinations under contrasting research conditions. The study was ...

    • Assessment of yield stability of bambara groundnut (Vigna subterranea (L.) Verdc.) using genotype and genotype-environment interaction biplot analysis 

      Linus, R.A.; Olanrewaju, O.S.; Oyatomi, O.; Idehen, E.O.; Abberton, M. (2023-10-04)
      Biplot analysis has emerged as a crucial statistical method in plant breeding and agricultural research. The objective of this research was to identify the best-performing genotype(s) for the environments in three distinct regions of Nigeria while also examining the characteristics and magnitude of genotype–environment interaction (GEI) effects on the yield of Bambara groundnut (BGN). The study was conducted in Ibadan, Ikenne, and Mokwa, utilizing a sample of 30 accessions. The yield of BGN was ...

    • Enhancing genetic gains in grain yield and efficiency of testing sites of early-maturing maize hybrids under contrasting environments 

      Badu-Apraku, B.; Abubakar, A.M.; Adu, G.B.; Yacoubou, A.M.; Adewale, S.; Adejumobi, I.I. (2023-09-30)
      The major challenges of maize production and productivity in Sub-Saharan Africa (SSA) include Striga hermonthica infestation, recurrent drought, and low soil nitrogen (low N). This study assessed the following: (i) accelerated genetic advancements in grain yield and other measured traits of early-maturing maize hybrids, (ii) ideal test environments for selecting early-maturing multiple-stress tolerant hybrids, and (iii) high-yielding and stable hybrids across multiple-stress and non-stress ...

    • Genetic structure analysis and identifying key founder inbred lines in diverse elite sub‑tropical maize inbred lines 

      Gedil, M.; Sayadi Maazou, A.R.; Zebire, D.; Garcia-Oliveira, A.L.; Nnachukwu, N.; Petroli, C.D.; Hearne, S.; Everett, L.A.; Kim, S.K.; Menkir, A. (2023-07-20)
      Understanding the genetic relationships between the key founder inbred lines and derived inbred lines could provide insight into the breeding history and the structure of genetic diversity of the available elite inbred lines with desirable target traits. The maize improvement program at the International Institute of Tropical Agriculture (IITA) analyzed the pedigree information of 623 sub-tropical maize inbred lines generated at the IITA maize breeding program to identify the key founder inbred ...

    • Redesigning crop varieties to win the race between climate change and food security 

      Pixley, K.V.; Cairns, J.; Lopez-Ridaura, S.; Ojiewo, C.O.; Dawud, M.A.; Drabo, I.; Mindaye, T.; Nebie, B.; Asea, G.; Das, B.; Daudi, H.; Desmae, H.; Batieno, B.J.; Boukar, O.; Mukankusi-Mugisha, C.; Nkalubo, S.; Hearne, S.; Dhugga, K.S.; Gandhi, H.; Snapp, S.; Zepeda-Villarreal, E.A. (2023-10)
      Climate change poses daunting challenges to agricultural production and food security. Rising temperatures, shiftingweatherpatterns,andmore frequent extremeeventshave alreadydemonstratedtheir effectsonlocal, regional, and global agricultural systems. Crop varieties thatwithstand climate-related stresses and are suitable for cultivation in innovative croppingsystemswillbe crucial tomaximize risk avoidance, productivity, and profitability under climate-changed environments. We surveyed 588 expert ...

    • Cutting dipping application of Flupyradifurone against cassava whiteflies Bemisia tabaci and impact on its parasitism in cassava 

      Caspary, R.; Wosula, E.N.; Issa, K.A.; Amour, M.; Legg, J. (2023-09-30)
      The cassava whitefly Bemisia tabaci causes damage in cassava through the feeding and vectoring of plant viruses that cause cassava mosaic and cassava brown streak diseases. This study sought to explore the efficacy of cutting dipping in flupyradifurone for whitefly control and the impact of the mode of application on whitefly parasitism under farmer field conditions. The insecticide treatment significantly reduced adult whiteflies by 41%, nymphs by 64%, and cassava mosaic disease (CMD) incidence ...

    • Association mapping in bambara groundnut [Vigna subterranea (L.) Verdc.] reveals loci associated with agro-morphological traits 

      Uba, C.U.; Oselebe, H.O.; Tesfaye, A.; Abtew, W.G. (2023-10-06)
      Background Genome-wide association studies (GWAS) are important for the acceleration of crop improvement through knowledge of marker-trait association (MTA). This report used DArT SNP markers to successfully perform GWAS on agro-morphological traits using 270 bambara groundnut [Vigna subterranea (L.) Verdc.] landraces sourced from diverse origins. The study aimed to identify marker traits association for nine agronomic traits using GWAS and their candidate genes. The experiment was conducted at ...

    • Heterotic grouping of provitamin A-enriched maize inbred lines for increased provitamin A content in hybrids 

      Sayadi Maazou, A.R.; Gedil, M.; Adetimirin, V.; Unachukwu, N.; Mengesha Abera, W.; Meseka, S.K.; Menkir, A. (2023-09-27)
      Background The establishment of heterotic groups of inbred lines is crucial for hybrid maize breeding programs. Currently, there is no information on the heterotic patterns of the Provitamin A (PVA) inbred lines developed in the maize improvement program of the International Institute of Tropical Agriculture (IITA) to form productive PVA enriched hybrids for areas affected by vitamin A deficiency. This study assessed the feasibility of classifying PVA-enriched inbred lines into heterotic groups ...

    • Towards a clean environment: to what extent can trees serve as phytoremediators for chemically polluted soils? 

      Olayiwola, V.A.; Mesele, S.A.; Ajayi, E.O. (2023)
      The study investigated the potential of five common tree species in West Africa to bioaccumulate heavy metals in their various plant components over the course of different growth phases and at varying contamination levels (control, double the permissible level and triple the permissible limit). Heavy metals in plant tissues were extracted and analyzed using standard wet chemistry procedures. The results showed metal concentrations in tree tissues to positively and significantly correlate with ...

    • Scale up trials to validate modified crops' benefits 

      Khaipho-Burch, M.; Cooper, M.; Crossa, J.; de Leon, N.; Holland, J.; Lewis, R.; McCouch, S.; Murray, S.C.; Rabbi, I.Y.; Ronald, P.C.; Ross-Ibarra, J.; Weigel, D.; Buckler, E.S. (2023-09-21)

    • Jobs in the circular bioeconomy under scrutiny: the challenging reality of compost production in Rwanda 

      Surchat, M.; Irakoze, M.; Hansmann, R.; Kantengwa, S.; Konlambigue, M.; Spath, L.; Wilde, B.; Six, J.; Krutli, P. (2023-12)
      Today, most African countries have dysfunctional municipal waste management system, negatively impacting the environment and human health. However, as most of this waste is recyclable, informal actors are making their income out of the collection/sorting of waste. Accounting for the risks involved in waste manipulation, it is important to ensure decent working conditions for those recycling it. This study focuses on biowaste recycling in Rwanda, a Circular Economy leader in Africa, with the purpose ...

    • Adoption and impacts of improved post-harvest technologies on food security and welfare of maize-farming households in Tanzania: a comparative assessment 

      Mutungi, C.; Manda, J.; Feleke, S.; Abass, A.; Bekunda, M.; Hoeschle-Zeledon, I.; Fischer, G. (2023-05-16)
      During the last decade, post-harvest losses (PHL) reduction has been topping the agenda of governments as a pathway for addressing food security, poverty, and nutrition challenges in Africa. Using survey data from 579 households, we investigated the factors that affect farmers’ decisions to adopt post-harvest technologies: mechanized shelling, drying tarpaulins, and airtight storage validated for reducing PHL in Tanzania’s maize-based systems, and the impacts on households’ food security and ...

    • Development of an improved steamer for optimum retention of carotenoids in Attieke produced from biofortified cassava (Manihot esculenta Crantz) roots 

      Alamu, E.O.; Sangodoyin, O.M.; Diallo, T.A.; Kolawole, P.; Olajide, J.O.; Jekayinfa, S.O.; Abass, A.; Tran, T.; Awoyale, W.; Parkes, E.; Maziya-Dixon, B. (2023)
      Attiéké, made from biofortified (yellow) cassava genotypes, requires a new cooking method to minimize carotenoid degradation during processing. Thus, this research is aimed at designing and building a more efficient steamer to produce high-quality attiéké from biofortified cassava roots. Using three improved biofortified cassava genotypes (IBA141092, IBA070593, and IBA011368) obtained from IITA research farms, attiéké samples were produced using traditional and developed steamers. The results show ...

    • Habitat range shift and prediction of the potential future distribution of Ricinodendron heudelotii (Baill.) Heckel in Benin (West Africa) 

      Hounsou-Dindin, G.; Idohou, R.; Agre, A.P.; Hounkpevi, A.; Adomou, A.; Assogbadjo, A.E.; Kakai, R.G. (2023)
      Ricinodendron heudelotii (Baill.) Heckel is an important nutraceutical reservoir. Its Sustainable exploitation requires information on its potential distribution in the current context of rapid population growth and climate change threats. This study aimed to map the suitable areas for its domestication and conservation under current and future climate conditions in Benin. Occurrence data were recorded and combined with the environmental layers of two climatic scenarios (optimistic RCP 4.5 and ...

    • Correlate the cyanogenic potential and dry matter content of cassava roots and leaves grown in different environments 

      Alamu, E.O.; Dixon, A.; Adesokan, M.; Maziya-Dixon, B. (2023)
      Cassava (Manihot esculenta Crantz) is an essential stable food crop in Sub-Saharan Africa commonly consumed amongst the low-income communities in Africa. Though cassava roots and leaf have vast economic and commercial benefits, it produces cyanogenic glycosides, which are toxic and most often responsible for the bitter taste of some cassava cultivars. The study evaluates the cassava roots and leaves’ cyanogenic potential and dry matter content of the Genetic Gain Assessment trial grown in a different ...

    • Effects of traditional preparatory techniques on the chemical and pasting characteristics of yellow-fleshed cassava roots (Manihot esculenta) 

      Alamu, E.O.; Maziya-Dixon, B.; Dixon, A. (2023)
      Understanding the interactions between chemical and pasting properties and conventional cooking methods will help utilise yellow-fleshed cassava roots. Thus, the study examined how conventional processing affected Nigerian yellow-fleshed cassava's chemical and pasting properties. Three improved, yellow-fleshed genotypes were harvested 12 months after planting: 01/1371 (high carotenoids, 7.3 μg/g on Fresh weight basis (FW)), 01/1235 (medium, 4.8 μg/g FW), and 94/0006 (low, 2.6 μg/g FW). The peeled ...