Stem rot and aggregated sheath spot are the two major stem and sheath diseases affecting rice (Oryza sativa L.) in temperate areas. A third fungal disease, sheath blight, is a major disease in tropical areas. Resistance to these diseases is a key objective in rice breeding programs but phenotypin...
Rosas, Juan E.
,
Martínez, Sebastián
,
Blanco, Pedro
,
Pérez de Vida, Fernando B.
,
Bonnecarrère, Victoria
,
Mosquera Cifuentes, Gloria Maria
,
Cruz Gallego, Maribel
,
Garaycochea, Silvia
,
Monteverde, Eliana
,
McCouch, Susan
,
Germán, Silvia
,
Jannink, Jean-Luc
,
Gutiérrez, Lucía
,
[Resistance to Multiple Temperate and Tropical Stem and Sheath Diseases of Rice]
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Resistance to Multiple Temperate and Tropical Stem and Sheath Diseases of Rice
Cassava production in the central, southern and eastern parts of Africa is under threat by cassava brown streak virus (CBSV). Yield losses of up to 100% occur in cases of severe infections of edible roots. Easy illegal movement of planting materials across African countries, and long-range moveme...
Ozimati, A.
,
Kawuki, R.
,
Esuma, W.
,
Kayondo, I.S.
,
Wolfe, M.
,
Lozano, R.
,
Rabbi, Ismail Y.
,
Kulakow, P.
,
Jannink, Jean-Luc
,
[Training population optimization for prediction of cassava brown streak disease resistance in west African clones]
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Training population optimization for prediction of cassava brown streak disease resistance in west African clones
Random forests (RF) was used to correlate spectral responses to known wet chemistry carotenoid concentrations including total carotenoid content (TCC), all-trans β-carotene (ATBC), violaxanthin (VIO), lutein (LUT), 15-cis beta-carotene (15CBC), 13-cis beta-carotene (13CBC), alpha-carotene (AC), 9...
Ikeogu, U.N.
,
Akdemir, D.
,
Wolfe, M.D.
,
Okeke, U.G.
,
Amaefula, C.
,
Jannink, Jean-Luc
,
Egesi, Chiedozie N.
,
[Genetic correlation, genome-wide association and genomic prediction of portable NIRS predicted carotenoids in cassava roots]
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Genetic correlation, genome-wide association and genomic prediction of portable NIRS predicted carotenoids in cassava roots
Introgression of alleles from wild relatives has often been adaptive in plant breeding. However, the significance of historical hybridization events in modern breeding is often not clear. Cassava (Manihot esculenta) is among the most important staple foods in the world, sustaining hundreds of mil...
Wolfe, M.D.
,
Bauchet, G.J.
,
Chan, A.W.
,
Lozano, R.
,
Ramu, P.
,
Egesi, Chiedozie N.
,
Kawuki, R.
,
Kulakow, P.
,
Rabbi, Ismail Y.
,
Jannink, Jean-Luc
,
[Historical introgressions from a wild relative of modern cassava improved important traits and may be under balancing selection]
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Historical introgressions from a wild relative of modern cassava improved important traits and may be under balancing selection
Cassava mosaic disease (CMD), caused by different species of cassava mosaic geminiviruses (CMGs), is themost important disease of cassava in Africa and the Indian sub-continent. The cultivated cassava speciesis protected from CMD by polygenic resistance introgressed from the wild species Manihot ...
Rabbi, Ismail Y.
,
Hamblin, M.
,
Kumar, P.L.
,
Gedil, M.
,
Ikpan, A.
,
Jannink, Jean-Luc
,
Kulakow, P.A.
,
[High-resolution mapping of resistance to cassava mosaic geminiviruses in cassava using genotypingbysequencing and its implications for breeding]
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High-resolution mapping of resistance to cassava mosaic geminiviruses in cassava using genotypingbysequencing and its implications for breeding
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
Portable Vis/NIRS are flexible tools for fast and unbiased analyses of constituents with minimal sample preparation. This study developed calibration models for dry matter content (DMC) and carotenoids in fresh cassava roots using a portable Vis/NIRS system. We examined the effects of eight data ...
Ikeogu, Ugochukwu N.
,
Davrieux, Fabrice
,
Dufour, D.L.
,
Ceballos, H.
,
Egesi, Chiedozie N.
,
Jannink, Jean-Luc
,
[Rapid analyses of dry matter content and carotenoids in fresh cassava roots using a portable visible and near infrared spectrometer (Vis/NIRS)]
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Rapid analyses of dry matter content and carotenoids in fresh cassava roots using a portable visible and near infrared spectrometer (Vis/NIRS)
Cassava green mite [CGM, Mononychellus tanajoa (Bondar)] is a dry-season pest that usually feeds on the underside of young leaves causing leaf chlorosis, stunted growth, and root yield reduction by 80%. Since cassava (Manihot esculenta Crantz) leaves and roots serve as a primary staple food sourc...
Ezenwaka, L.C.
,
Carpio, D.P. del
,
Jannink, Jean-Luc
,
Rabbi, Ismail Y.
,
Danquah, E.Y.
,
Asante, I.
,
Danquah, A.
,
Blay, E.
,
Egesi, Chiedozie N.
,
[Genome-wide association study of resistance to cassava green mite pest and related traits in cassava]
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Genome-wide association study of resistance to cassava green mite pest and related traits in cassava
Cassava (Manihot esculenta (L.) Crantz) is a starchy root crop cultivated in the tropics for fresh consumption and commercial processing. Dry matter content and micronutrient density, particularly of provitamin A, traits that are negatively correlated, are among the primary selection objectives i...
Rabbi, Ismail Y.
,
Udoh, L.I.
,
Wolfe, M.
,
Parkes, E.Y.
,
Gedil, Melaku A
,
Dixon, A.
,
Ramu, P.
,
Jannink, Jean-Luc
,
Kulakow, P.A.
,
[Genome-Wide Association Mapping of Correlated Traits in Cassava: Dry Matter and Total Carotenoid Content]
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Genome-Wide Association Mapping of Correlated Traits in Cassava: Dry Matter and Total Carotenoid Content