Resultados de búsqueda - "Nigeria"

Genetic diversity and relationship of indigenous goats of Sub-saharan Africa using microsatellite DNA markers por Muema, E.K., Wakhungu, Judi W., Hanotte, Olivier H., Han Jianlin

“…This study was undertaken to determine the genetic diversity in and differentiation of relationships among 18 populations of goats from Uganda (4), Tanzania (5), Kenya (2), Mozambique (2), Nigeria (3), Mali (1) and Guinea Bissau (1). Heterozygosity, estimates of FST, genetic diversity and distances were performed using data from 11 microsatellite DNA loci. …”
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Supply and demand for livestock credit in sub-Saharan Africa: Lessons for designing new credit schemes por Jabbar, M.A., Ehui, Simeon K., Kaufmann, Ralph R. von

“…Based on analysis of credit supply in Ethiopia, Kenya, Uganda and Nigeria, it is shown that public credit institutions do not have sufficient funds to meet the demand for livestock credit and cannot mobilize savings from their clients or other commercial sources for one reason or another. …”
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A molecular genetic map of cassava (Manihot esculenta Crantz) por Fregene, Martin A., Angel, F., Gómez, R., Rodríguez, F., Chavarriaga Aguirre, Paul, Roca, W., Tohme, Joseph M., Bonierbale, Merideth W.

“…2177-2’, elite cassava cultivars from Nigeria and Colombia, respectively. The map consists of 20 linkage groups spanning 931.6?…”
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Haematological values of Nigerian goats and sheep por Oduye, O.O.

“…Studies the haematological parameters of clinically healthy goats and sheep in Ibadan, west state of Nigeria. Eighty-five goats from West African Dwarf goat, the Sokoto, Kano Brown goat and their crosses; and 295 sheep from the West African Dwarf sheep of ages ranging from 2 weeks to 7 years were investigated. …”
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Efficiency of secondary traits in selecting for improved grain yield in extraearly maize under Strigainfested and Strigafree environments por Badu-Apraku, Baffour, Akinwale, R., Oyekunle, M.

“…There are contradictory reports on the reliabilityof number of emerged Striga plants for selecting for Striga resistance.The objective of this study was to confirm reliability of thesecondary traits for selecting for improved grain yield under Striga infestation.Ten Striga-resistant extra-early cultivars were evaluated for3 years under artificial Striga-infested and Striga-free environments inNigeria. Analysis of variance combined across years and locationsshowed significant mean squares for genotype, year, location and theirinteractions for most traits. …”
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Management of Meloidogyne incognita in yambased cropping systems with cover crops por Claudius-Cole, A.O., Fawole, B., Asiedu, Robert, Coyne, Danny L.

“…The effect of intercropping cover crops was with yam was assessed for nematode management both inpot and field conditions in Nigeria. The cover crops were sown with yams in pots containing sterile soiland inoculated with 5000 eggs of Meloidogyne incognita. …”
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Replication Data for: Vulnerability to climate change of cocoa in West Africa: Patterns, opportunities and limits to adaptation por Schroth, Götz, Läderach, Peter R.D., Martínez Valle, Armando Isaac, Bunn, Christian, Jassogne, Laurence T.P.

“…We find that: 1) contrary to expectation, maximum dry season temperatures are projected to become as or more limiting for cocoa as dry season water availability; 2) to reduce the vulnerability of cocoa to excessive dry season temperatures, the systematic use of adaptation strategies like shade trees in cocoa farms will be necessary, in reversal of the current trend of shade reduction; 3) there is a strong differentiation of climate vulnerability within the cocoa belt, with the most vulnerable areas near the forest-savanna transition in Nigeria and eastern Côte d'Ivoire, and the least vulnerable areas in the southern parts of Cameroon, Ghana, Côte d'Ivoire and Liberia; 4) this spatial differentiation of climate vulnerability may lead to future shifts in cocoa production within the region, with the opportunity of partially compensating losses and gains, but also the risk of local production expansion leading to new deforestation.…”
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Adapting a yam seed technique to meet farmers’ criteria por Odu, B.O., Coyne, Danny L., Kumar, P. Lava

“…About 400 farmers in Kogi State, Nigeria have tried the technique. They had credit to buy the pesticides. …”
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Breeding cowpea for resistance to striga gesnerioides in the Nigerian dry savannas using marker-assisted selection por Omoigui, L.O., Kamara, A.Y., Moukoumbi, Y.D., Ogunkanmi, L.A., Timko, M.P.

“…In this study, we have successfully developed and applied a marker-assisted selection strategy that employs a single backcross programme to introgress Striga resistance into farmer preferred varieties of cowpea for the Nigeria savannas. In this strategy, we have introduced the Striga resistance gene from the donor parent IT97K-499-35 into an elite farmer preferred cowpea cultivar ‘Borno Brown’. …”
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Experimental evaluation of the efficiency of Epidinocarsis lopezi, a parasitoid introduced into Africa against the cassava mealybug Phenacoccus manihoti por Neuenschwander, Peter, Schulthess, F., Madojemu, E.

“…(Homoptera: Pseudococcidae) was investigated in Nigeria using physical and chemical exclusion experiments. …”
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Impacts of extension access and cooperative membership on technology adoption and household welfare por Assfaw Wossen, Tesfamicheal, Abdoulaye, Tahirou, Alene, A., Haile, M.G., Feleke, S., Olanrewaju, A.S., Manyong, Victor M.

“…This paper examines the impacts of access to extension services and cooperative membership on technology adoption, asset ownership and poverty using household-level data from rural Nigeria. Using different matching techniques and endogenous switching regression approach, we find that both extension access and cooperative membership have a positive and statistically significant effect on technology adoption and household welfare. …”
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Effects of recurrent selection for grain yield and Striga resistance in an extraearly maize production por Badu-Apraku, Baffour

“…In an extra-early population, S1 families derived from four cycles of recurrent selection for grain yield and Striga resistance were evaluated with and without Striga infestation at three locations in Nigeria for 2 yr to determine relative changes in genetic variances, heritabilities, and genetic correlations for yield and other traits. …”
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Monitoring and evaluation data requirement guide por Azzarri, Carlo, Haile, Beliyou

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Combining ability analysis of resistance to mosaic virus disease in cassava por Lokko, Y., Dixon, Alfred G.O., Offei, S., Danquah, E.Y.

“…A North Carolina design II experiment, with three improved cassava (Mctnihot esculenta Crantz) accessions as the female parents, l5 cassava landraces and three improved cassava accessions as the male parents (3 x I 8), was evaluated in three environments in Nigeria to determine the mode of gene action and the combining ability, and also t() estimate heterosis for resistance to cassava mosaic disease (CMD), in various sources of resistance. …”
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Response to recurrent selection for resistance to Striga hermonthica (Del.) Benth in a tropical maize population por Menkir, A., Kling, J.

“…The selection cycles and checks were evaluated with and without S. hermonthica infestation at two locations in Nigeria for 2 yr. Selection for improved performance under S. hermonthica infestation significantly increased grain yield by 24% cycle-1 and ears per plant by 9% cycle-1. …”
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Food Safety Training Workshop. Theme: Managing food safety and quality in small-scale food processing for Roots, Tubers and Bananas (RTB) value chains in Sub-Saharan Africa. por Musyoka, J., Njunge, F., Muzhingi, T.

“…The training was attended by 27 participants (15 men and 12 women) from 11 countries (Ethiopia, Kenya, Ghana, Nigeria, Uganda, Cameroon, Tanzania, DRC, Malawi, USA, and UK). …”
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Analyse sexospecifique dans la production agricole: Guide de recherche de lIita, No. 58 por Buckland, L., Haleegoah, J.

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Isozyme markers and taxonomic relationships among Vigna species por Sonnante, G., Piergiovanni, A., Ng, N., Perrino, P.

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Recent developments in cowpea cropping systems research por Blade, S., Shetty, S., Terao, T., Singh, B.

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Abundance of soil mites under four agroforestry tree species with contrasting litter quality por Badejo, M.A., Tian, G.

“…Populations of soil-dwelling mites were monitored in monoculture plots of four agroforestry tree species, Gliricidia sepium, Leucaena leucocephala, Dactyladenia barteri and Treculia africana, and compared to those in grass and secondary forest plots in the dry season (December 1993 to January 1994) and in the wet season (April to June 1994) in southwest Nigeria. Mite populations were very low in all plots during the dry season (500–3000 m–2), compared to those during the wet season (10 000–30 000 m–2). …”
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