The identification of superior genotypes and mega-environments on the basis of multiple traits is a key objective of multi-environment trials in cassava (Manihot esculenta Crantz). The objective of this study was to examine the genetic variation and genotype 3 environment interaction (GEI) effect...
Egesi, Chiedozie N.
,
Ilona, P.
,
Ogbe, F.O.
,
Akoroda, M.O.
,
Dixon, A.
,
[Genetic variation and genotype X environment interaction for yield and other agronomic traits in cassava in Nigeria]
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Genetic variation and genotype X environment interaction for yield and other agronomic traits in cassava in Nigeria
A total of 23 genotypes belonging to seven tropical food yams and two wild relative species of different origin and coming from two sampling ecological zones (the Republic of Benin in Africa and Guadeloupe in the Caribbean) was analysed for their 13C content. The δ13C values for all yam samples (...
Cornet, D.
,
Sierra, J.
,
Bonhomme, R.
,
[Characterization of the photosynthetic pathway of some tropical food yams (Dioscorea spp.) using leaf natural 13C abundance]
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Characterization of the photosynthetic pathway of some tropical food yams (Dioscorea spp.) using leaf natural 13C abundance
Seven white yam (Dioscorea rotundata Poir.) genotypes (1 local and 6 hybrids from IITA) were evaluated in 13 environments using randomized complete block design (RCBD) with 3 replications. The environments were Fumesua (forest) from 2000 to 2004 and Wenchi (forest Guinea savannah transition) from...
Otoo, E.
,
Okonkwo, C.
,
Asiedu, Robert
,
[Stability studies of hybrid yam (Dioscorea rotundata Poir.) genotypes in Ghana]
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Stability studies of hybrid yam (Dioscorea rotundata Poir.) genotypes in Ghana
The cassava mosaic virus disease (CMD) is the most important disease o1'cassava in Africa, causing severe economic losses. The genetic stock, clone 58308, has been extensively used in breeding for resistance to the disease, but recently, other sources o1'resistance to the disease have been identi...
Lokko, Y.
,
Dixon, Alfred G.O.
,
Offei, S.K.
,
Danquah, E.Y.
,
[Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions]
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Gene complementarity of resistance to the cassava mosaic disease among African cassava accessions
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 a...
Lokko, Y.
,
Dixon, Alfred G.O.
,
Offei, S.
,
Danquah, E.Y.
,
[Combining ability analysis of resistance to mosaic virus disease in cassava]
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Combining ability analysis of resistance to mosaic virus disease in cassava
Striga hermonthica parasitism is a major constraint limiting Sorghum productivity in the Nigerian savanna. Field experiments were conducted in 2005 and 2006 rainy seasons to evaluate the response of sorghum varieties to striga infestation. A randomised complete block design was used to screen 12 ...
Dugje, I.Y.
,
Ekeleme, F.
,
Kamara, A.Y.
,
Menkir, A.
,
Chikoye, D.
,
Omoigui, L.O.
,
[Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas]
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Field evaluation of sorghum varieties to Striga hermonthica infestation in north eastern Nigerian savannas
Aflatoxin contamination is widespread instaple crops like peanut, maize, sorghum, pearlmillet, chillies, pistachio, cassava etc., and com-promises the safety of food and feed supplies. It isimportant to be able to detect and quantifyaflatoxins in commodities to p...
Waliyar, F.
,
Reddy, S.V.
,
Kumar, P.L.
,
[Review of immunological methods for the quantification of aflatoxins in peanut and other foods]
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Review of immunological methods for the quantification of aflatoxins in peanut and other foods
Multilocation evaluation trials (MET) constitute an important step in the evaluation of breeding lines, in order to assess their adaptation and stability patterns across environments, and to ensure optimal targeting of the lines. Seven Musa genotypes comprising five plantain hybrids, one cooking ...
Tenkouano, A.
,
Baiyeri, K.P.
,
[Adaptation pattern and yield stability of banana and plantain genotypes grown in contrasting agro-ecologies in Nigeria]
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Adaptation pattern and yield stability of banana and plantain genotypes grown in contrasting agro-ecologies in Nigeria
West African N'Dama cattle have developed a genetic capacity to survive, reproduce and remain productive under trypanosomosis risk. The cellular and molecular bases of this so-called trypanotolerance are not known, but the trait is manifested by the N'Dama's greater capacity to control parasitae...
Naessens, Jan
,
Leak, S.G.A.
,
Kennedy, D.J.
,
Kemp, Stephen J.
,
Teale, A.J.
,
[Responses of bovine chimaeras combining trypanosomosis resistant and susceptible genotypes to experimental infection with Trypanosoma congolense]
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Responses of bovine chimaeras combining trypanosomosis resistant and susceptible genotypes to experimental infection with Trypanosoma congolense
Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. A study was conducted to evaluate the response of diverse cowpea genotypes to different schedules of spraying ...
Kamara, Y.
,
Chikoye, D.
,
Omoigui, L.O.
,
Dugje, I.Y.
,
[Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria]
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Influence of insecticide spraying regimes and cultivar on insect pests and yield of cowpea in the dry savannas of northeastern Nigeria