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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]Relatedness and genotype x environment interaction affect prediction accuracies in genomic selection: a study in cassava

In clonally propagated crops, non-additive genetic effects can be effectively exploited by the identification of superior genetic individuals as varieties. Cassava (Manihot esculenta Crantz) is a clonally propagated staple food crop that feeds hundreds of millions. We quantified the amount and na...


Wolfe, M.D.Kulakow, P.A.Rabbi, Ismail Y.Jannink, Jean-Luc[Marker-based estimates reveal significant non-additive effects in clonally propagated cassava (Manihot esculenta): implications for the prediction of total genetic value and the selection of varieties]Marker-based estimates reveal significant non-additive effects in clonally propagated cassava (Manihot esculenta): implications for the prediction of total genetic value and the selection of varieties

In the last 45 years, IITA has played a pivotal role in the genetic improvement of cassava for resourcepoor farmers in sub-Saharan Africa (SSA). More than 400 varieties have been developed that are not only high yielding but also resistant to diseases and pests. Many of these improved varieties h...


Rabbi, Ismail Y.Gedil, M.Ferguson, M.Kulakow, P.A.[Cassava improvement in the era of "agrigenomics": the road to nextgeneration breeding.]Cassava improvement in the era of "agrigenomics": the road to nextgeneration breeding.

Modern biotechnologies have dramatically reshaped the crop improvement research during the past decade. Biotechniques have become indispensable for efficient and effective development of new knowledge, processes, and products. IITA's biotechnology, strategized as three major themes― genomics, tra...


Gedil, M.Rabbi, Ismail Y.[Leveraging agrigenomics" for crop improvement"]Leveraging agrigenomics" for crop improvement"

The Bill & Melinda Gates Foundation (BMGF) and the CGIAR Research Program on Roots, Tubers and Bananas (RTB) cofunded the Cassava Monitoring Survey (CMS) project with the objective of documenting the extent of adoption of improved cassava varieties with a rigorous sampling and DNA based identific...


Assfaw Wossen, TesfamichealGirma Tessema, G.Abdoulaye, TahirouRabbi, Ismail Y.Olanrewaju, A.S.Bentley, J.Alene, A.Feleke, S.Kulakow, P.A.Asumugha, G.N.Adebayo, M.A.Tokula, M.Manyong, Victor M.[The cassava monitoring survey in Nigeria: final report]The cassava monitoring survey in Nigeria: final report

Several alternative options have been used for varietal identification. However most of the traditional methods have inherent uncertainty levels and estimates often have wide confidence intervals. In an attempt to circumvent traditional survey-based measurement errors in varietal identification, ...


Girma Tessema, G.Rabbi, Ismail Y.Olanrewaju, A.S.Alaba, O.Kulakow, P.A.Alabi, T.Ayedun, B.Abdoulaye, TahirouAssfaw Wossen, TesfamichealAlene, A.Manyong, Victor M.[A manual for large-scale sample collection, preservation, tracking, DNA extraction, and variety identification analysis]A manual for large-scale sample collection, preservation, tracking, DNA extraction, and variety identification analysis

The Cassava Monitoring Survey (CMS) project was funded by the CGIAR-RTB Program and the Bill & Melinda Gates Foundation. The main goal was to carry out a study on cassava adoption and diffusion patterns in Nigeria. This includes explaining why farmers are adopting certain varieties and describing...


Bentley, J.W.Olanrewaju, A.S.Madu, T.Olaosebikan, O.Abdoulaye, TahirouAssfaw Wossen, TesfamichealManyong, Victor M.Kulakow, P.A.Ayedun, B.Ojide, M.Girma Tessema, G.Rabbi, Ismail Y.Asumugha, G.N.Tokula, M.[Cassava farmers' preferences for varieties and seed dissemination system in Nigeria: gender and regional perspectives]Cassava farmers' preferences for varieties and seed dissemination system in Nigeria: gender and regional perspectives

Prasad, P.Agbona, A.Kulakow, P.Rabbi, Ismail Y.Egesi, Chiedozie N.Parkes, E.Aina, O.Mueller, L.[Cassavabase, an advantage for IITA cassava breeding program]Cassavabase, an advantage for IITA cassava breeding program

Cassava (Manihot esculenta Crantz) is an important food security crop for poor rural communities, particularly in Africa. At household level, cassava landraces used for cultivation are mainly selected based on farmers' interests, leading to very particular diversity evolution over generations. Th...


Agre, A.P.Gueye, B.Adjatin, A.Dansi, M.Bathacharjee, R.Rabbi, Ismail Y.Dansi, M.Gedil, M.[Folk taxonomy and traditional management of cassava (Manihot esculenta Crantz) diversity in southern and central Benin]Folk taxonomy and traditional management of cassava (Manihot esculenta Crantz) diversity in southern and central Benin

Rabbi, Ismail Y.Kulakow, P.A.Manu-Aduening, J.A.Dankyi, Ansong A.Asibuo, James Y.Parkes, E.Abdoulaye, TahirouGirma, G.Gedil, Melaku ARamu, P.Reyes, B.Maredia, Mywish K.[Tracking crop varieties using genotypingbysequencing markers: a case study using cassava (Manihot esculenta Crantz)]Tracking crop varieties using genotypingbysequencing markers: a case study using cassava (Manihot esculenta Crantz)

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