Resultados de búsqueda - "Nigeria"

Genetic structure and diversity of Phakopsora pachyrhizi isolates from soyabean por Twizeyimana, M., Ojiambo, P.S., Haudenshield, J.S., Caetano‐Anollés, G., Pedley, K.F., Bandyopadhyay, Ranajit, Hartman, G.L.

“…Simple sequence repeat (SSR) markers were used to classify 116 isolates of Phakopsora pachyrhizi, the cause of soyabean rust, collected from infected soyabean leaves in four agroecological zones in Nigeria. A high degree of genetic variation was observed within the sampled populations of P. pachyrhizi. …”
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Response of upland rice cultivars to weed competition in the savannas of West Africa por Ekeleme, F., Kamara, A.Y., Oikeh, S.O., Omoigui, L.O., Amaza, P., Abdoulaye, Tahirou, Chikoye, David

“…A 2-year field study was conducted to assess the effect of weed competition on the performance ofupland rice cultivars in the savannas of Nigeria. A split-plot design was used with three weeding levels asthe main plot treatments and the rice cultivars CG 14, ITA 150, WAB 56-104, NERICA1, NERICA2, andNERICA4 as the subplots. …”
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Changes in total carotenoid content at different stages of traditional processing of yellowfleshed cassava genotypes por Maziya-Dixon, B.B., Dixon, Alfred G.O., Ssemakula, G.N.

“…The changes in content of total carotenoid at each stage of processing cassava storage roots were investigatedwith three improved yellow-fleshed cassava varieties (TMS 94⁄0006, TMS 01⁄1235 and TMS 01⁄1371)grown in 2005⁄2006 in a randomised complete block design with two replications at Ibadan, Nigeria. Whenthe cassava roots were grated to a mash, results obtained indicate that there was a significant reduction intotal carotenoid content for all the genotypes. …”
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Integrated pest management in cowpea: effect of time and frequency of insecticide application on productivity por Ajeigbe, Hakeem A., Singh, B.B.

“…Experiments during the cropping seasons of 2002–2004 at Kano, Nigeria, evaluated four cowpea varieties and five combinations of time and frequency of insecticide treatments. …”
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Genetic variability and heritability studies of some reproductive traits in cowpea (Vigna unguiculata (L.) Walp.) por Omoigui, L.O., Ishiyaku, M.F., Kamara, A.Y., Alabi, S.O., Mohammed, S.G.

“…A screen house experiment was carried out at Samaru, Nigeria in 1999 and 2000 dry seasons to estimate the genotypic variability of some reproductive traits and their heritability in some selected cowpea varieties. …”
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Ploidy and genome composition of Musa germplasm at the International Institute of Tropical Agriculture (IITA) por Pillay, M., Ogundiwin, E., Tenkouano, A., Doležel, Jaroslav

“…This study determined the ploidy levels and genome composition of the Musa germplasm collection, constituting over 300 accessions, at the International Institute of Tropical Agriculture in Nigeria and Uganda. Flow cytometric analysis of nuclear DNA content was used to estimate ploidy levels, while genome composition was ascertained with RAPD markers that are specific for the A and B genomes of Musa. …”
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Comparative proteomics of nearisogenic maize inbred lines to identify potential aflatoxinresistance markers por Brown, R.L., Menkir, A., Bandyopadhyay, Ranajit, Cleveland, T.E., Chen, Z.

“…These lines were developed in Nigeria through a joint project between ARS-SRRC and the International Institute of Tropical Agriculture. …”
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Preliminary assessment of root systems morphology in Musa por Blomme, Guy, Ortíz, R.

“…The root system development of 11 genotypes from six diverse Musa groups was studied in detail at IITA High Rainfall Station (Onne, southeastern Nigeria). Plantain hybrids (TMPx 548-9, TMPx 1658-4) were compared with their maternal French plantain landrace (Obino l' Ewai) and their paternal diploid bananas (Calcutta 4 and Pisang Lilin). …”
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An orphan crop, the orange-fleshed sweet potato, in West Africa: Can we reposition it? por Abidin, P.E., Adekambi, S., Nchor, J., Koara, I., Carey, E.E.

“…Sweet potato (Ipomoea batatas L.) was not an important crop in Ghana, Burkina Faso and Nigeria, West Africa, in the past decades. An effort has been made to reposition the sweet potato crop in West Africa. …”
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Amelioration de la duree de conservation du plantain et de la banane: Guide de recherche de lIita, No. 62 por Ferris, R.S.B.

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Effect of soil degradation on leaf decomposition and nutrient release under humid tropical conditions por Tian, G.

“…Characterization of degradation of an Alfisol caused by clearing and long-term cultivation and the effect of the degradation on leaf (Cajanus cajan) decomposition and nutrient (N and P) release were studied in the humid zone of southwest Nigeria. Degradation of the Alfisol as a result of land clearing and 17-year continuous cropping led to loss of soil biota and deterioration of soil physical and chemical properties. …”
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Morphological diversity, cultivar groups and possible descent in the cultivated yams (Dioscorea cayenensis/D. rotundata) complex in Benin Republic por Dansi, A., Mignouna, Hodeba D., Zoundjihékpon, J., Sangare, A., Asiedu, Robert, Quin, F.M.

“…The flowering and the fruiting capacity of the morphotypes as well as their adaptability (based on tuber morphology) to mechanical harvesting are also discussed. Some collections in Nigeria (IITA, Ibadan) and Togo containing cultivars from many West African countries were inspected to verify the geographical distribution of Beninese cultivars.…”
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Program E: Enhancing livelihoods in the humid and subhumid zones of West and Central Africa through profitable and sustainable intensification of diverse agricultural systems por Akoroda, M.O., Amegbeto, K., Asiedu, Robert, Attey, A.N., Baah, F., Bakam, I., Bandyopadhyay, Ranajit, Boivin, M., Boons, P., Cornet, D., Coyne, Danny L., David, S., Dixon, A., Dumet, D., Ezedinma, C.I., Gockowski, J., Goergen, Georg E., Gyamfi, I., Hanna, R., Halos-Kim, L., Hauser, S., Hughes, J., Kikuno, H., Kolesnikova-Allen, M., Legg, C., Legg, James P., Lema, A., Lemchi, J., Lokko, Y., Makinde, K., Mahungu, N.M., Maroya, N.G., Maziya-Dixon, B.B., Mkumbira, J., Mva Mva, J., Mwangi, M., Nguimgo, B., Nielsen, O., Nkamleu, G.B., Nolte, C., Norgrove, L., Ogbe, F., Okafor, C., Okechukwu, R., Okoro, E., Patino, M., Sanni, Lateef O., Shiwachi, H., Ssemakula, G.N., Tarawali, G., Tenkouno, A., Tindo, M., Toko, M., Weise, Stephan F., Wendt, J., Yapo Assamoi, A.

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Promoting maize technology transfer in West and Central Africa: a networking approach por Badu-Apraku, Baffour, Fakorede, M.A.B., Ajala, S.O.

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Host response to black sigatoka in Musa germplasm of different ages under natural inoculation conditions por Mobambo, K.N., Pasberg-Gauhl, C., Gauhl, F., Zuofa, K.

“…The development of an early evaluation method for host response of different Musa clones to black sigatoka was investigated under natural inoculation conditions in southeastern Nigeria. Two months old tissue-culture-derived plants of three plantain hybrids and parents of the hybrids were exposed to the natural inoculum of Mycosphaerella fijiensis in a field planted with a susceptible plantain cultivar. …”
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Qualite du mais et nutrition: guide de recherche de lIita, No. 33 por Kling, J.

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Multidisciplinary approach to pest management and the African farmer por Okigbo, B.

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Producción y consumo

“…Los cuatro países mayores productores de Africa: Ghana, Nigeria, Costa · de Marfil y Camerún reducirán su producción.…”
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Turrialba; Vol. 35, no. 3

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Productividad potencial de diferentes cruces comerciales DxP de palma africana (Elaeis guineensis Jacq.) en Coto, Costa Rica por Escóbar C, R

“…Four commercial sources werw studied: Guthries, Malaysia, Harrisons and Crosfield, Makaysia; Institut of rechreches pom les Huiles et Oleagineux Ivory Coast and Nigerian Institute for Oil Palm Research, Nigeria. One D x P cross Honduras was also included as a control. …”
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