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Genotype by environment interaction remains a substantial issue in all breeding programs. Crop genotypes are generally developed in a central breeding location, but always require the evaluation of breeding products in different environments. This is particularly relevant in countries that have a...


Hanna, R.Kulakow, P.Parkes, E.Iluebbey, P.Ngome, F.A.Suh, C.Massussi, J.Choutnji, I.Wirnkar, V.L.[AMMI analysis of cassava response to contrasting environments: case study of genotype by environment effect on pests and diseases, root yield, and carotenoids content in Cameroon]AMMI analysis of cassava response to contrasting environments: case study of genotype by environment effect on pests and diseases, root yield, and carotenoids content in Cameroon

Cassava is a major staple and food security crop in Africa which can produce a crop under uncertain rainfall and low fertility conditions. How- ever, it suffers from several pests and diseases, with Cassava Mosaic Disease (CMD) being the main biotic constraint in production in s...


Parkes, E.Fregene, Martin A.Dixon, A.Okogbenin, EmmanuelBoakye-Peprah, B.Labuschagne, M.T.[Developing Cassava Mosaic Disease resistant cassava varieties in Ghana using a marker assisted selection approach]Developing Cassava Mosaic Disease resistant cassava varieties in Ghana using a marker assisted selection approach
Parkes, E.[Cassava: mentor on a mission why cassava and capacity building are closely coupled]Cassava: mentor on a mission why cassava and capacity building are closely coupled

Breeding for resistant genotypes is the best strategy to offset the destructive effects of cassava mosaic disease (CMD) and cassava bacterial blight (CBB). Two sets of diallel parents were selected for the forest and the savannah ecological zones in Ghana based on good levels of resistance to CMD...


Parkes, E.Fregene, Martin A.Dixon, A.Boakye-Peprah, B.Labuschagne, M.T.[Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana]Combining ability of cassava genotypes for cassava mosaic disease and cassava bacterial blight, yield and its related components in two ecological zones in Ghana
Parkes, E.Kulakow, P.A.Alamu, E.O.Maziya-Dixon, B.B.Aina, O.O.Ofei, R.Iluebbey, P.Agbona, A.Bakare, M.Dixon, A.[Performance of proVitamin A cassava clones across eleven environments in two seasons in Nigeria]Performance of proVitamin A cassava clones across eleven environments in two seasons in Nigeria

The study was carried out to quantify the genotype × environment interaction (G × E) and to estimate the phenotypic stability by genotype genotype × environment (GGE) biplot of nine cassava clones comprising 5 hybrids, 3 parent checks and 1 improved variety. The study was planted across three dif...


Boakye-Peprah, B.Ofori , K.Asante, I.Parkes, E.[Performance of nine cassava (Manihot esculanta Crantz) clones across three environments]Performance of nine cassava (Manihot esculanta Crantz) clones across three environments

A study was conducted to assess the extent of genetic variability, broad-sense heritability and correlations for fresh root weight, root number and top weight of five cassava genotypes across three locations in 2 years. Combined analysis of variance revealed highly significant genotypic effect fo...


Boakye-Peprah, B.Ofori , K.Asante, I.Parkes, E.[Genetic variability of three cassava traits across three locations in Ghana]Genetic variability of three cassava traits across three locations in Ghana

Genetic enhancement of cassava aimed at increasing productivity through the provision of broad-based which improved germplasm and is also a major goal for cassava breeders. 10 genotypes (4 landraces and 6 developed lines) were evaluated at Fumesua, Ejura and Pokuase in 2 growing seasons in a rand...


Peprah, B.B.Agyeman, A.Parkes, E.Kwadwo, O.Isaac, A.K.Okogbenin, E.Labuschagne, M.T.[Stability, agronomic performance and genetic variability of 10 cassava genotypes in Ghana]Stability, agronomic performance and genetic variability of 10 cassava genotypes in Ghana

Thirty white fleshed cassava genotypes derived from crosses between genotypes from West Africa x East Africa and West Africa x Latin America were evaluated in five major agroecological zones in Nigeria during 2012-2013. The trials were established in a randomized complete block design with four r...


Uchendu, U.K.Parkes, E.Aina, O.O.Akoroda, M.O.Kulakow, P.A.[Phenotypic evaluation of a multi-location cassava breeding trial to improve a genomic selection training population]Phenotypic evaluation of a multi-location cassava breeding trial to improve a genomic selection training population

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