Accurate identification of crop cultivars is crucial in assessing the impact of crop improvement research outputs. Two commonly used identification approaches, elicitation of variety names from farmer interviews and morphological plant descriptors, have inherent uncertainty levels. Genotyping-by-...
Rabbi, Ismail Y.
,
Kulakow, P.A.
,
Manu-Aduening, J.A.
,
Dankyi, Ansong A.
,
Asibuo, James Y.
,
Parkes, Elizabeth Y
,
Abdoulaye, Tahirou
,
Girma, Gezahegn
,
Gedil, Melaku A
,
Ramu, Punna
,
Reyes, Byron
,
Maredia, Mywish K.
,
[Tracking crop varieties using genotyping-by-sequencing markers: a case study using cassava (Manihot esculenta Crantz)]
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Tracking crop varieties using genotyping-by-sequencing markers: a case study using cassava (Manihot esculenta Crantz)
The distribution and frequency of single nucleotide polymorphisms (SNPs) is an excellent tool for discerning evolutionary relatedness between cultivated and wild plant genomes. This type of information is scanty for the genus Manihot, and thus limiting systematic approaches in the genetic improve...
Beyene, D.
,
Mukasa, S.B.
,
Jansson, C.
,
Villiers, Etienne P. de
,
Ferguson, M.
,
Rabbi, Ismail Y.
,
Kyamanywa, S.
,
Sebuliba, J.
,
Baguma, Yona K.
,
[Patterns on nucleotide diversity in Meisa1 and G3PHD in wild and cultivated cassava]
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Patterns on nucleotide diversity in Meisa1 and G3PHD in wild and cultivated cassava
Cassava (Manihot esculenta Crantz) is an important staple food in sub-Saharan Africa. Breeding experiments were conducted at the International Institute of Tropical Agriculture in cassava to select elite parents. Taking into account the heterogeneity in the field while evaluating these trials can...
Elias, A.A.
,
Rabbi, Ismail Y.
,
Kulakow, P.A.
,
Jannink, Jean-Luc
,
[Improving genomic prediction in cassava field experiments using spatial analysis]
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Improving genomic prediction in cassava field experiments using spatial analysis
Plants' competing for available resources is an unavoidable phenomenon in a field. We conducted studies in cassava (Manihot esculenta Crantz) in order to understand the pattern of this competition. Taking into account the competitive ability of genotypes while selecting parents for breeding advan...
Elias, A.A.
,
Rabbi, Ismail Y.
,
Kulakow, P.
,
Jannink, Jean-Luc
,
[Improving genomic prediction in cassava field experiments by accounting for interplot competition]
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Improving genomic prediction in cassava field experiments by accounting for interplot competition
Background: Genomic selection (GS) promises to accelerate genetic gain in plant breeding programs especially for crop species such as cassava that have long breeding cycles. Practically, to implement GS in cassava breeding, it is necessary to evaluate different GS models and to develop suitable m...
Okeke, U.G.
,
Akdemir, D.
,
Rabbi, Ismail Y.
,
Kulakow, P.A.
,
Jannink, Jean-Luc
,
[Accuracies of univariate and multivariate genomic prediction models in African cassava]
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Accuracies of univariate and multivariate genomic prediction models in African cassava
Compared with other reduced-representation sequencing methods, library construction for genotyping-by-sequencing (GBS) is simpler and less expensive. However, elimination of sizeselection steps results in libraries of more variable fragment size than with other reduced-re...
Hamblin, M.
,
Rabbi, Ismail Y.
,
[The effects of restrictionenzyme choice on properties of genotypingbysequencing libraries: a study in cassava (Manihot esculenta)]
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The effects of restrictionenzyme choice on properties of genotypingbysequencing libraries: a study in cassava (Manihot esculenta)
Before implementation of genomic selection, evaluation of the potential accuracy of prediction can be obtained by cross-validation. In this procedure, a population with both phenotypes and genotypes is split into training and validation sets. The prediction model is fitted using the training set,...
Ly, D.
,
Hamblin, M.
,
Rabbi, Ismail Y.
,
Gedil, M.
,
Bakare, M.A.
,
Gauch Jr. H.
,
Okechukwu, R.U.
,
Dixon, A.
,
Kulakow, P.A.
,
Jannink, Jean-Luc
,
[Relatedness and genotype x environment interaction affect prediction accuracies in genomic selection: a study in cassava]
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Relatedness and genotype x environment interaction affect prediction accuracies in genomic selection: a study in cassava
Agre, A.P.
,
Rabbi, Ismail Y.
,
Battachargee, R
,
Becerra López Lavelle, Luis Augusto
,
Sanni, A.
,
Akouegninou, A.
,
Akpagana, K.
,
[Agromorphological characterization of elite cassava (Manihot esculenta crantz) cultivars collected in Benin]
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Agromorphological characterization of elite cassava (Manihot esculenta crantz) cultivars collected in Benin