Twelve cassava (Manihot esculenta Crantz) genotypes were planted under natural field conditions for two different cropping seasons (wet and dry), in 1992 and 1993 at the research farm of the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria. The trial studied the effect of p...
Fokunang, C.N.
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Akem, C.N.
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Ikotun, T.
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Dixon, Alfred G.O.
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[Effect of planting season on cassava anthracnose disease development]
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Effect of planting season on cassava anthracnose disease development
The concentration of African cassava mosaic virus (ACMV) was assessed by enzyme-linked immunosorbent assay in relation to symptom severity among resistant, moderately resistant and susceptible cassava genotypes. Resistant genotype NR 8083 had significantly lower symptom severity scores (P < 0·05)...
Ogbe, F.
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Atiri, G.
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Dixon, Alfred G.O.
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Thottappilly, G.
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[Symtom severity of cassava mosaic disease in relation to concentration of African cassava mosaic virus in different cassava genotypes]
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Symtom severity of cassava mosaic disease in relation to concentration of African cassava mosaic virus in different cassava genotypes
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, Ni...
Maziya-Dixon, B.B.
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Dixon, Alfred G.O.
,
Ssemakula, G.N.
,
[Changes in total carotenoid content at different stages of traditional processing of yellowfleshed cassava genotypes]
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Changes in total carotenoid content at different stages of traditional processing of yellowfleshed cassava genotypes
Thirty-one improved cultivars and five Nigerian landraces of cassava were assessed at genomic DNA level with 16 SSR primers for genetic diversity study. The minimum number of SSR primers that could readily be used for identification of the 36 cassava genotypes was also determined. For the genetic...
Moyib, O.K.
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Odunola, O.A.
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Dixon, Alfred G.O.
,
[SSR markers reveal genetic variation between improved cassava cultivars and landraces within a collection of Nigerian cassava germplasm]
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SSR markers reveal genetic variation between improved cassava cultivars and landraces within a collection of Nigerian cassava germplasm
Ninety-eight cassava accessions were grown in augmented randomized complete block design to screen for superior clones with desirable traits. The desirable traits were root number (RTNO), fresh root yield (FYLD), harvest index (HI), dry matter (DM), cyanide potential (CNP), mean plant height (MPH...
Asante, I.K.
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Dixon, Alfred G.O.
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[Field screening of cassava (Manihot esculenta Crantz) germplasm for desirable traits by the use of augmented design]
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Field screening of cassava (Manihot esculenta Crantz) germplasm for desirable traits by the use of augmented design
A survey was carried out in the 1996/97 and 1997/98 growing seasons on a field planted in three replicates with five clones of cassava at the International Institute of Tropical Agriculture, Ibadan, located in a transition forest, to determine the effects of cassava genotype and climate on the de...
Abdullahi, I.
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Atiri, G.I.
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Dixon, Alfred G.O.
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Winter, S.
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Thottappilly, G.
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[Effects of cassava genotype, climate, and the Bemisia tabaci vector population on the development of African cassava mosaic geminivirus (ACMV)]
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Effects of cassava genotype, climate, and the Bemisia tabaci vector population on the development of African cassava mosaic geminivirus (ACMV)
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.
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Dixon, Alfred G.O.
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Offei, S.K.
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Danquah, E.Y.
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[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.
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Dixon, Alfred G.O.
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Offei, S.
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Danquah, E.Y.
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[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
The effects of genotype (G), environment (E), and G x E interaction on carotenoid concentration and yield of 25 yellow-fleshed (YF) and three white-fleshed (WF) cassava genotypes were investigated at five locations in Nigeria for two consecutive cropping seasons. The locations represented the maj...
Ssemakula, G.N.
,
Dixon, Alfred G.O.
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Maziya-Dixon, B.B.
,
[Stability of total carotenoid concentration and fresh yield of selected yellow-fleshed cassava (Manihot esculenta Crantz)]
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Stability of total carotenoid concentration and fresh yield of selected yellow-fleshed cassava (Manihot esculenta Crantz)
In 2004 and 2005 through field trials in over 2500 locations in several agroecological zones, 40 new cassava varieties were introduced in Nigeria. The trials were managed by scientists, extension workers and farmers. The aim in introducing these new varieties was to pre-emptively manage cassava m...
Okechukwu, R.U.
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Dixon, Alfred G.O.
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Akoroda, M.O.
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Mwangi, M.
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Bandyopadhyay, Ranajit
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[Root rot resistance in new cassava varieties introduced to farmers in Nigeria]
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Root rot resistance in new cassava varieties introduced to farmers in Nigeria