Now showing items 1-20 of 4501

    • Genetic Diversity and Environmental Influence on Growth and Yield Parameters of Bambara Groundnut 

      Olanrewaju, O.S.; Oyatomi, O.; Babalola, O.O.; Abberton, M. (2021-12-20)
      Bambara groundnut (BGN) is a drought-tolerant crop majorly cultivated in sub-Saharan Africa. Due to a lack of extensive research, marginalization, lack of awareness, and lack of available fund among others, this crop’s improvement has been limited. The development of this crop depends on evaluation and selection of unique and stable breeding lines in different environments. This study aims to estimate genetic diversity using morphological traits at different locations in 95 accessions of BGN ...
    • Indifferent to difference? Understanding the unequal impacts of farming technologies among smallholders. A review 

      Thuijsman, E.S.; den Braber, H.; Andersson, J.A.; Descheemaeker, K.; Baudron, F.; López-Ridaura, S.; Vanlauwe, B.; Giller, K. (2022)
      With many of the world’s poor engaged in agriculture, agricultural development programmes often aim to improve livelihoods through improved farming practices. Research on the impacts of agricultural technology interventions is dominated by comparisons of adopters and non-adopters. By contrast, in this literature study, we critically review how technology evaluation studies assess differentiated impacts in smallholder farming communities. We searched systematically for studies which present ...
    • An ICT strategy based upon E-Teaching and E-Learning in response to the COVID-19 crisis in Africa 

      Woomer, P.L.; Mulei, W.; Maina, S.K. (2021)
      The COVID-19 pandemic is a crisis that has gripped the world, causing governments and development agencies to search for critical measures to protect their people. The situation not only represents a significant health risk but has resulted in school closures that have disrupted agricultural education. This impedes the attainment of Africa’s larger food security and rural transformation agendas. Six months before the advent of the pandemic, the International Institute of Tropical Agriculture ...
    • CO2 supplementation eliminates sugar-rich media requirement for plant propagation using a simple inexpensive temporary immersion photobioreactor 

      Trauger, M.; Hile, A.; Sreenivas, K.; Shouse, E.M.; Bhatt, J.; Lai, T.; Mohandass, R.; Tripathi, L.; Ogden, A.J.; Curtis, W.R. (2022)
      In vitro plant propagation systems such as temporary immersion bioreactors (TIBs) are valuable tools that enable production of disease-free plants with improved traits. However, TIB systems can be expensive, difficult to implement, and prone to contamination due to sugar rich propagation media. Using rapidly growing chicory root cultures to expedite design-build-test cycles, we report here an improved, low-cost version of a previously reported Hydrostatically-driven TIB (Hy-TIB) that facilitates ...
    • Analyses of genetic diversity and population structure of sesame (Sesamum indicum L.) germplasm collections through seed oil and fatty acid compositions and SSR markers 

      Teklu, D.H.; Shimelis, H.; Abebe, A.T.; Shayanowako, A.I.T. (2022)
      Knowledge of the genetic profiles of diverse germplasm collections of sesame using seed oil, fatty acid contents, and molecular markers is a prerequisite to develop market-preferred cultivars with quantity and quality oil. The objective of this study was to determine the genetic diversity and relationships among Ethiopia’s sesame germplasm collections using seed oil content and fatty acid compositions and diagnostic simple sequence repeat (SSR) markers to select genetically complementary and ...
    • Understanding the perceptions of secondary school youth toward agricultural careers in Democratic Republic of Congo, Kenya and Nigeria 

      Mulei, W.; Larinde, B.; Adefioye, A.; Bobo, P.; Woomer, P.L. (2020)
      Youth are critical participants in the modernization of African agriculture but often their perception of farming is negative. A baseline survey of 1264 students from eight secondary schools in Democratic Republic (DR) of Congo, Kenya and Nigeria was conducted to assess their attitudes toward career pathways to agriculture and agribusiness. KoboToolBox was used to collect data online before compilation and inspection for errors in Microsoft Excel and exportation into STATA for analysis. Findings ...
    • Homing in on endogenous badnaviral elements: Development of multiplex PCR-DGGE for detection and rapid identification of badnavirus sequences in yam germplasm 

      Silva, G.; Bömer, M.; Turaki, A.A.; Nkere, C.; Kumar, P.L.; Seal, S. (2022)
      Viruses of the genus Badnavirus (family Caulimoviridae) are double-stranded DNA-reverse transcribing (dsDNA-RT) plant viruses and have emerged as serious pathogens of tropical and temperate crops globally. Endogenous badnaviral sequences are found integrated in the genomes of several economically important plant species. Infection due to activation of replication-competent integrated copies of the genera Badnavirus, Petuvirus and Cavemovirus has been described. Such endogenous badnaviral elements ...
    • Adoption of improved cassava varieties by processors is linked to processing characteristics and products biophysical attributes 

      Abass, A.; Awoyale, W.; Ogundapo, A.T.; Oluwasoga, O.; Nwaoliwe, G.; Oyelekan, J.; Olarinde, L. (2022)
      Evidence from community cassava processors on product quality traits that influence variety adoption was combined with laboratory methods to identify potential predictors of quality traits of new varieties. The study revealed that high product yield, high starch content, high solubility index (SI), high peak viscosity (PV), low setback viscosity, and delayed root color change (delayed postharvest physiological deterioration) are possible laboratory indicators that could be used as proxies for ...
    • Datasets on the variations of minerals in biofortified cassava (Manihot esculenta Crantz) as a function of storage root portion, maturity and environment 

      Alamu, E.O.; Maziya-Dixon, B.; Dixon, A. (2022)
      Background: The accurate measurements of the mineral content of cassava roots are vital from a nutritional perspective. The research datasets were from the study assessing the influence of storage root portion, maturity, and environment on the variations of minerals in biofortified cassava roots. Methods: Twenty-five biofortified clones with three varieties as checks were harvested 12 months after planting from five different environments. Also, a different thirty-nine (39) biofortified cassava ...
    • Identification of early and extra-early maturing tropical maize inbred lines with multiple disease resistance for enhanced maize production and productivity in sub-Saharan Africa 

      Bankole, F.; Badu-Apraku, B.; Salami, A.O.; Falade, T.D.O.; Bandyopadhyay, R.; Ortega-Beltran, A. (2022)
      Maize, a staple for millions across sub-Saharan Africa (SSA), faces major biotic constraints affecting production and safety of the crop. These include the northern corn leaf blight (NCLB), southern corn leaf blight (SCLB), Curvularia leaf spot (CLS), and aflatoxin contamination by Exserohilum turcicum, Bipolaris maydis, Curvularia lunata, and Aspergillus flavus, respectively. Farmers in SSA would benefit tremendously if high yielding maize hybrids with multiple disease resistance (MDR) were ...
    • Accelerated genetic gains in early-maturing maize hybrids following three periods of genetic enhancement for grain yield under low and high soil-nitrogen environments 

      Badu-Apraku, B.; Fakorede, M.; Abubakar, M. (2022)
      Maize (Zea mays L.) is an important staple, as well as cash crop, in sub-Saharan Africa (SSA). However, its production is severely constrained by low soil nitrogen (low N). Fifty-four early-maturing hybrids developed during three breeding periods, (2008–2010, 2011–2013 and 2014–2016) were evaluated under low (30 kg ha−1) and high (120 kg ha−1) soil nitrogen (N) in Ile-Ife and Mokwa, Nigeria, from 2017 to 2019. The study was designed to (i) determine the genetic gains in grain yield of the ...
    • Genome-wide association analysis reveals genetic architecture and candidate genes associated with grain yield and other traits under low soil nitrogen in early-maturing white quality protein maize inbred lines 

      Bhadmus, O.O.; Badu-Apraku, B.; Adeyemo, O.; Agre, A.P.; Queen, O.N.; Ogunkanmi, L.A. (2022)
      Maize production in the savannas of sub-Saharan Africa (SSA) is constrained by the low nitrogen in the soils. The identification of quantitative trait loci (QTL) conferring tolerance to low soil nitrogen (low-N) is crucial for the successful breeding of high-yielding QPM maize genotypes under low-N conditions. The objective of this study was to identify QTLs significantly associated with grain yield and other low-N tolerance-related traits under low-N. The phenotypic data of 140 early-maturing ...
    • Aflatoxin and fumonisin mycotoxins contamination along the maize value chain in the eastern Democratic Republic of Congo 

      Matendo, R.E.; Imathiu, S.; Udomkun, P.; Mugumaarhahama, Y.; Akullo, J.; Ishara, J.; Atehnkeng, J.; Owino, W.O. (2022-04)
      Aflatoxin and fumonisin contamination was assessed in different samples along the maize value chain in different territories of South Kivu province. Kabare and Ruzizi Plain were chosen as they represent two different agroecological areas where maize is mostly produced. Twelve districts and one town were selected across the province. The stakeholders were randomly selected, and 215 maize (139 maize grain and 76 maize flour) samples were taken for laboratory analysis. The Q + kit was used to determine ...
    • Grain yield potential and stability of soybean genotypes of different ages across diverse environments in southern Africa 

      Mushoriwa, H.; Mathew, I.; Gwata, E.T.; Tongoona, P.; Derera, J. (2022)
      Soybean [Glycine max (L.) Merrill] is an important crop in southern Africa where it is cultivated in a wide range of agro-ecologies. Both spatial and seasonal variability is high in the region. As a result, breeders aim to release varieties with a fine balance of high productivity potential and stability. Genotype × environment interaction (GEI) limits the selection of superior genotypes in heterogeneous environments consequently slowing down breeding progress. This study determined the magnitude ...
    • Phylogeography and conservation gaps of Musa balbisiana Colla genetic diversity revealed by microsatellite markers 

      Mertens, A.; Bawin, Y.; Abeele, S.V.; Kallow, S.; Swennen, R.; Vu, D.T.; Vu, T.D.; Minh, H.T.; Panis, B.; Vandelook, F.; Janssens, S. (2022)
      Collection and storage of crop wild relative (CWR) germplasm is crucial for preserving species genetic diversity and crop improvement. Nevertheless, much of the genetic variation of CWRs is absent in ex situ collections and detailed passport data are often lacking. Here, we focussed on Musa balbisiana, one of the two main progenitor species of many banana cultivars. We investigated the genetic structure of M. balbisiana across its distribution range using microsatellite markers. Accessions stored ...
    • Contribution of temperate germplasm to the performance of maize hybrids under stress and non-stress environments in South Africa 

      Shandu, S.F.; Gasura, E.; Mashingaidze, K.; Derera, J. (2022)
      Increases in genetic gains are crucial to maize breeding programmes. The objectives of this study were to identify higher-yielding and stable maize hybrids across stress and non-stress environments, to identify representative test environments for testing and selection of superior maize genotypes, and to determine the contribution of temperate maize germplasm in the performance of new tropical hybrids. Respectively 42 and 72 newly developed single-cross hybrids together with check hybrids were ...
    • Genetic diversity and population structure of an African yam bean (Sphenostylis stenocarpa) collection from IITA GenBank 

      Shitta, N.S.; Unachukwu, N.; Edemodu, A.; Abebe, A.T.; Oselebe, H.O.; Abtew, W.G. (2022-03)
      African yam bean, AYB (Sphenostylis stenocarpa), is an underutilized legume of tropical Africa. AYB can boost food and nutritional security in sub-Saharan Africa through its nutrient-rich seeds and tubers. However, inadequate information on germplasm with desirable agro-morphological traits, including insufficient data at the genomic level, has prevented the full exploitation of its food and breeding potentials. Notably, assessing the genetic diversity and population structure in a species is a ...
    • Coupled forest zoning and agricultural intervention yields conflicting outcomes for tropical forest conservation in the Democratic Republic of the Congo (DRC) 

      Nackoney, J.; Demol, M.; Akpona, H.A.; Bauters, M.; Boeckx, P.; Dupain, J.; Facheux, C.; Hansen, M.C.; Kalemba, J.C.; Kehbila, A.G.; Potapov, P.; Senga, A.T.; Six, J.; Turubanova, S.; Williams, D.; Vanlauwe, B. (2022)
      Agricultural intensification and forest conservation are often seen as incompatible. Agricultural interventions can help boost food security for poor rural communities but in certain cases can exacerbate deforestation, known as the rebound effect. We tested whether coupling agricultural interventions with participatory forest zoning could improve food security and promote forest conservation in the Democratic Republic of the Congo. Simple agricultural interventions led to a >60% increase in cassava ...
    • Genome-wide association study reveals genetic architecture and candidate genes for yield and related traits under terminal drought, combined heat and drought in tropical maize germplasm 

      Osuman, A.S.; Badu-Apraku, B.; Karikari, B.; Ifie, B.E.; Tongoona, P.; Danquah, E. (2022)
      Maize (Zea mays L.) production is constrained by drought and heat stresses. The combination of these two stresses is likely to be more detrimental. To breed for maize cultivars tolerant of these stresses, 162 tropical maize inbred lines were evaluated under combined heat and drought (CHD) and terminal drought (TD) conditions. The mixed linear model was employed for the genome-wide association study using 7834 SNP markers and several phenotypic data including, days to 50% anthesis (AD) and silking ...
    • Assessing the spatial variability of soil properties to delineate nutrient management zones in smallholder maize-based system of Nigeria 

      Peter-Jerome, H.; Adewopo, J.; Kamara, A.; Aliyu, K.T.; Dawaki, M.U. (2022)
      Spatially explicit information on soil variability is relevant for agronomic decisions; however, such information is limited in the northern Guinea savanna (NGS) agroecological zone of Nigeria. This study was conducted to delineate soil nutrient management zones (MZs), based on spatial variability of soils in the smallholder maize-based farming system within the NGS. Two hundred and eighty-nine soil samples were analyzed for some physical and chemical properties. Principal component analysis (PCA) ...