Resultados de búsqueda - "Nigeria"

In vitro, greenhouse, and field assessment of cassava lines for resistance to anthracnose disease caused by colletotrichum gloeosporiodes f. sp. Manihotis por Fokunang, C.N., Dixon, Alfred G.O., Ikotun, T., Asiedu, Robert, Tembe-Fokunang, E.A., Akem, C.N.

“…Fifty-three cassava lines were selected from breeding populations at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria and screened in vitro for resistance to cassava anthracnose disease (CAD). …”
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Evaluación de la calidad del arroz por Valencia M., César A.

“…Actualmente se produce en China, Indonesia, Burma, Brasil Egipto, Nigeria, Italia, Japón, España, USA, Tailandia, Colombia y en muchos otropaíses. …”
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El injerto de cacao por Paredes, L.A., Instituto Interamericano de Ciencias Agrícolas (IICA)

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Delineation of tuber development in African yam bean (Sphenostylis stenocarpa (Hochst ex. A. Rich) Harms por Ojuederie, T.C.

“…Three tuber-forming (TSs 96, TSs 107, and TSs157) and three non-tuber forming (TSs 51, TSs 150, and TSs 152) accessions of AYB were collected from the Genetic Resources Centre of the International Institute of Tropical of Agriculture, Ibadan, Nigeria and evaluated on the field at two different periods: (June – December 2020) and (September 2020 – March 2021) for agromorphological traits. …”
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Protocole de certification des semences de patate douce au Togo por Olasanmi, B., Gmakouba, J., Djobo, S., Kpadenou, A.K., Salami, D., Djiwonou, K.E., Bona, K.A., Afanahin, K., Dzaka, E.Y., Bariyene, K.G., Abioye, O., Diallo, T.A., Olorode, A., Kinglo, H.S., Tchegueni, M., Akande, A.

“…L’Institut International d’Agriculture Tropicale (IITA), par l’intermédiaire du Fonds International de Développement Agricole (FIDA), a financé la transformation agricole dans les États fédéraux du Nigeria et les régions du Togo pour atteindre la faim zéro par l’élaboration du présent protocole pour la certification des semences de patate douce. …”
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Amelioration of a highly degraded tropical alfisol by planting 1. Changes in soil physical and chemical properties por Hulugalle, N.R.

“…The studies were made on two highly degraded sites in southwestern Nigeria which had been subjected to intensive mechanized cropping for a period of 10 years. …”
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Tillage and mulching effects on physical properties of a tropical alfisol por Franzen, H., Ehlers, W.

“…Therefore, a 2 year (1982–1984) field experiment was initiated on an Alfisol in Nigeria to study the effect of tillage, mechanization and mulch on soil structure and physical properties. …”
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Field measurements of nitrogen fixation in leguminous trees used in agroforestry systems: influence of 15Nlabelling approaches and reference trees por Sanginga, N., Danso, S.K.A., Zapata, F.

“…A 4-year field experiment was conducted on an Alfisol in Southwestern Nigeria to compare the estimates of Na fixed in Leucaena leucocephala, using two non-N2-fixing leguminous trees, Senna siamea and S. spectabiIis, as reference plants and three different methods of introducing 15N into soil. …”
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Inheritance of resistance to Cercospora leaf spot disease of cowpea [Vigna unguiculata (L.) Walp] por Omoigui, L., Arrey, M.O., Kamara, A., Danmaigona, C.C., Ekeruo, G., Timko, M.P.

“…Cercospora leaf spot (CLS) caused by Pseudocercospora cruenta (Sacc.) is an important disease affecting cowpea production in Nigeria. Understanding the genetic nature of CLS is an important step in developing an effective breeding strategy. …”
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Collecting meaningful data on labor use and farm size for economic analysis associated with onfarm trials in subSaharan African por Spencer, D.S.C.

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Effect of seedbed preparation method and mulch on soil physical properties and yield of cowpea in a rice fallow of an inland valley swamp por Hulugalle, N.R., Palada, M.C.

“…Walp.) were studied in a rice fallow of an inland valley swamp in central Nigeria during the dry seasons of 1988 and 1989. Soil physical properties measured were particle size distribution, bulk density, soil water retention, penetrometer resistance, pore size distribution, soil temperature and wetness. …”
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Genetic analysis of grain yield and agronomic traits of early provitamin A quality protein maize inbred lines in contrasting environments por Obeng-Bio, E., Badu-Apraku, Baffour, Ifie, B.E., Danquah, A., Blay, E.T., Annor, B.

“…Ninety-six hybrids generated from 24 inbred lines using the North Carolina Design II together with four commercial hybrid controls were evaluated under drought, low-N and optimal environments in Nigeria in 2016 and 2017. Fifty-four selected hybrids were assayed for PVA carotenoid and tryptophan content. …”
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Metabolic profiles of six African cultivars of cassava (Manihot esculenta Crantz) highlight bottlenecks of root yield por Obata, T., Klemens, P.A.W., Rosado Souza, L., Schlereth, A., Gisel, A., Stavolone, L., Zierer, W., Morales, N., Muller, L.A., Zeeman, S.C., Ludewig, F., Stitt, M., Sonnewald, U., Neuhaus, H.E., Fernie, A.R.

“…Six commercial African cassava cultivars were grown in a greenhouse in Erlangen, Germany, and in the field in Ibadan, Nigeria. Source leaves, sink leaves, stems and storage roots were harvested during storage root bulking and analyzed for sugars, organic acids, amino acids, phosphorylated intermediates, minerals, starch, protein, activities of enzymes in central metabolism and yield traits. …”
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Transcriptomics of host-specific interactions in natural populations of the parasitic plant purple witchweed (Striga hermonthica) por López, L., Bellis, E.S., Wafula, E., Hearne, S., Honaas, L., Ralph, P.E., Timko, M.P., Unachukwu, N.N., dePamphilis, C.W., Lasky, J.R.

“…We examined gene expression variation and differences in allelic frequency in expressed genes of aboveground tissues from populations in western Nigeria parasitizing each host. Despite low levels of host-based genome-wide differentiation, we identified a set of parasite transcripts specifically associated with each host. …”
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The relative resistance of cassava cultivars to African Cassava Mosaic Disease (ACMD) as determined by two methods: ranksum and the area under the disease progress curve por Ariyo, O.A., Dixon, A.G.O., Atiri, G.I.

“…Twenty-five newly bred improved cassava cultivars, twenty-three improved from the International Institute of Tropical Agriculture and two local cultivars were evaluated for their relative resistance to African cassava mosaic begomovirus disease (ACMD) at Ibadan, in an area of high disease pressure representative of the forest/savanna transition zone of Nigeria. These cultivars were exposed to natural infection by the viruliferous whiteflies ( Bemisia tabaci Gennadius) and the Disease Incidence (DI) and index of symptom severity (ISS) were assessed for all clones. …”
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Processing factors affecting the level of residual cyanohydrins in gari por Onabolu, A., Oluwole, O., Rosling, H., Bokanga, M.

“…This neurological syndrome is endemic in some communities in south‐western Nigeria. Studies have shown that methods of processing cassava roots determine the quantity of cyanogens in gari. …”
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CLIFF-GRADS Science Collaboration Series 2020 - Thematic student session: Soil Systems por Chirinda, Ngonidzashe, Turek, Maria Eliza, Silva Santos, Erick Rodrigo da, Amenchwi, Amahnui George, dos Santos, Ricardo Cesário, Mlambo, Antony, Shefine, Bethel Geremew, Okolo, Chukwuebuka Christopher

“…Student Speakers: Maria Eliza Turek, Brazil; Erick Rodrigo da Silva Santos, Brazil; Amahnui George Amenchwi, Cameroon; Ricardo Cesário dos Santos, Brazil; Antony Mlambo, Zimbabwe; Bethel Geremew Shefine, Ethiopia; Chukwuebuka Christopher Okolo, Nigeria. The 2020 CLIFF-GRADS Science Collaboration Series was developed to facilitate technical capability building, knowledge transfer and international collaboration for the CLIFF-GRADS Alumni. …”
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Introgression breeding in cowpea [Vigna unguiculata (L.) walp.] por Boukar, O., Abberton, Michael T., Oyatomi, Olaniyi, Togola, A., Tripathi, L., Fatokun, C.

“…Transgenic cowpea with Bt gene cry1Ab showing resistance to M. vitrata has been released in Nigeria. Genome editing, a powerful emerging tool, can also be used for developing improved cowpea varieties with durable resistance to pests and diseases.…”
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GGE biplot analysis of genotype x environment interaction and yield stability in bambara groundnut por Olanrewaju, Oluwaseyi S., Oyatomi, Olaniyi, Babalola, O.O., Abberton, Michael T.

“…The goal of this study was to find the winning genotype(s) for the test settings in a part of the Southwest region of Nigeria, as well as to investigate the nature and extent of genotype × environment interaction (GEI) effects on Bambara groundnut (BGN) production. …”
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Marker based enrichment of provitamin A content in two tropical maize synthetics por Kebede, D., Mengesha Abera, W., Menkir, A., Abe, A., Garcia-Oliveira, A.L., Gedil, Melaku A

“…The two populations, known as HGA and HGB, and their advanced selection cycles (C1 and C2) were evaluated at Ibadan in Nigeria. Selection increased the concentrations of β-carotene, PVA and total carotenoids across cycles in HGA, while in HGB only α-carotene increased with advances in selection cycle. β-cryptoxanthine increased at C1 but decreased at C2 in HGB. …”
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