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Journal Article 2019-12

Autor: Afuape, S.O. Tongoona, P.B. Asante, I.K. Egesi, Chiedozie N. Nwaigwe, G. Offei, S.K.

This study was embarked upon to stack two key but inversely associated sweetpotato traits (dry matter and beta-carotene content) through conventional breeding methods. Thirty-seven elite sweetpotato genotypes were evaluated for both traits, and 15 parents comprising five orange-, five yellow- and...

Enlace original: https://cgspace.cgiar.org/handle/10568/106673

Investigación en Agricultura
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Afuape, S.O. ,  Tongoona, P.B. ,  Asante, I.K. ,  Egesi, Chiedozie N. ,  Nwaigwe, G. ,  Offei, S.K. ,  [Breeding new sweetpotato genotypes combining elevated content of two antagonistic traits of high dry matter and beta-carotene content in a high root yield background] ,  Breeding new sweetpotato genotypes combining elevated content of two antagonistic traits of high dry matter and beta-carotene content in a high root yield background
Journal Article 2019-10

Autor: 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

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/105625

Investigación en Agricultura
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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] ,  Historical introgressions from a wild relative of modern cassava improved important traits and may be under balancing selection
Journal Article 2011

Autor: Njoku, DN Vernon, G Egesi, Chiedozie N. Asante, I.K. Offei, SK Okogbenin, Emmanuel Kulakow, P.A. Eke-Okoro, O.N. Ceballos, H.

This review presents an overview of the importance, constraints, and prospects on different aspects of cassava (Manihot esculenta crantz) breeding for enhanced micronutrient level, including carotenoids (precursors for provitamin-A) and especially beta-carotene. Early cassava-breeding efforts con...

Enlace original: https://cgspace.cgiar.org/handle/10568/43238

Investigación en Agricultura
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Njoku, DN ,  Vernon, G ,  Egesi, Chiedozie N. ,  Asante, I.K. ,  Offei, SK ,  Okogbenin, Emmanuel ,  Kulakow, P.A. ,  Eke-Okoro, O.N. ,  Ceballos, H. ,  [Breeding for enhanced ß-Carotene content in cassava: constraints and accomplishments] ,  Breeding for enhanced ß-Carotene content in cassava: constraints and accomplishments
Journal Article 2018-07-12

Autor: Teeken, B. Olaosebikan, O. Haleegoah, J. Oladejo, E. Madu, T. Bello, A. Parkes, E. Egesi, Chiedozie N. Kulakow, P. Kirscht, H. Tufan, Hale Ann

Nigeria is the world’s largest cassava producer, hosting a diverse array of cassava farmers and processors. Cassava breeding programs prioritize “common denominator” traits in setting breeding agendas, to impact the largest possible number of people through improved varieties. This approach has b...

Enlace original: https://cgspace.cgiar.org/handle/10568/96570

Investigación en Agricultura
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Teeken, B. ,  Olaosebikan, O. ,  Haleegoah, J. ,  Oladejo, E. ,  Madu, T. ,  Bello, A. ,  Parkes, E. ,  Egesi, Chiedozie N. ,  Kulakow, P. ,  Kirscht, H. ,  Tufan, Hale Ann ,  [Cassava trait preferences of men and women farmers in Nigeria: implications for breeding] ,  Cassava trait preferences of men and women farmers in Nigeria: implications for breeding
Journal Article 2017-04-17

Autor: Ramu, P. Esuma, W. Kawuki, R. Rabbi, Ismail Y. Egesi, Chiedozie N. Bredeson, J.V. Bart, R.S. Verma, J. Buckler, E.S. Lu, F

Cassava (Manihot esculenta Crantz) is an important staple food crop in Africa and South America; however, ubiquitous deleterious mutations may severely decrease its fitness. To evaluate these deleterious mutations, we constructed a cassava haplotype map through deep sequencing 241 diverse accessi...

Enlace original: https://cgspace.cgiar.org/handle/10568/81024

Investigación en Agricultura
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Ramu, P. ,  Esuma, W. ,  Kawuki, R. ,  Rabbi, Ismail Y. ,  Egesi, Chiedozie N. ,  Bredeson, J.V. ,  Bart, R.S. ,  Verma, J. ,  Buckler, E.S. ,  Lu, F ,  [Cassava haplotype map highlights fixation of deleterious mutations during clonal propagation] ,  Cassava haplotype map highlights fixation of deleterious mutations during clonal propagation
Journal Article 2017-12-11

Autor: Ikeogu, Ugochukwu N. Davrieux, Fabrice Dufour, D.L. Ceballos, H. Egesi, Chiedozie N. Jannink, Jean-Luc

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 ...

Enlace original: https://cgspace.cgiar.org/handle/10568/89923

Investigación en Agricultura
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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)] ,  Rapid analyses of dry matter content and carotenoids in fresh cassava roots using a portable visible and near infrared spectrometer (Vis/NIRS)
Journal Article 2002

Autor: Egesi, Chiedozie N. Pillay, M. Asiedu, A. Egunjobi, J.K.

Poor reproductive development in yams (Dioscorea spp.) has often been attributed to the polyploid nature of the crop. In this study, flow cytometry was used to determine the ploidy level of 53 accessions of Dioscorea alata, mostly from West African countries, Chad and Puerto Rico. Nuclei were iso...

Enlace original: https://cgspace.cgiar.org/handle/10568/99954

Investigación en Agricultura
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Egesi, Chiedozie N. ,  Pillay, M. ,  Asiedu, A. ,  Egunjobi, J.K. ,  [Ploidy analysis in water yam, Dioscorea alata L., germplasm] ,  Ploidy analysis in water yam, Dioscorea alata L., germplasm
Journal Article 2018-08

Autor: 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.

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...

Enlace original: https://cgspace.cgiar.org/handle/10568/97154

Investigación en Agricultura
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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] ,  Genome-wide association study of resistance to cassava green mite pest and related traits in cassava
Journal Article 2007

Autor: Okogbenin, Emmanuel Porto, M.C.M. Egesi, Chiedozie N. Mba, C Espinosa, E. Santos Melendez, LG Ospina, C. Marin, JA Barrera Sabogal, E Gutiérrez A., Janeth Patricia Ekanayake, I.J. Iglesias, C.A. Fregene, Martin A.

The gene pools for breeding cassava (Manihot esculenta Crantz) in Africa currently contain only a fraction of the existing genetic variation found in Latin America where the crop originates. Our research aimed to broaden the genetic base in Africa by introducing Latin American (LA) germplasm. The...

Enlace original: https://cgspace.cgiar.org/handle/10568/43842

Investigación en Agricultura
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Okogbenin, Emmanuel ,  Porto, M.C.M. ,  Egesi, Chiedozie N. ,  Mba, C ,  Espinosa, E. ,  Santos Melendez, LG ,  Ospina, C. ,  Marin, JA ,  Barrera Sabogal, E ,  Gutiérrez A., Janeth Patricia ,  Ekanayake, I.J. ,  Iglesias, C.A. ,  Fregene, Martin A. ,  [Marker-assisted introgression of resistance to cassava mosaic disease into Latin American germplasm for the genetic improvement of cassava in Africa] ,  Marker-assisted introgression of resistance to cassava mosaic disease into Latin American germplasm for the genetic improvement of cassava in Africa
Journal Article 2014-01-15

Autor: Olasanmi, B Akoroda, M.O. Okogbenin, Emmanuel Egesi, Chiedozie N. Kahya, SS Onyegbule, O Ewa, F. Gutiérrez, J. Ceballos, H. Tohme, Joseph M. Fregene, Martin A.

Late root bulking is a major factor leading to rejection and abandoning of improved cassava genotypes in sub-Saharan Africa. Early bulking (EB) varieties shorten the growth period from planting to harvesting, better fit into environments with short rainy season, and reduce exposure to biotic and ...

Enlace original: https://cgspace.cgiar.org/handle/10568/42140

Investigación en Agricultura
Enlace permanente
Olasanmi, B ,  Akoroda, M.O. ,  Okogbenin, Emmanuel ,  Egesi, Chiedozie N. ,  Kahya, SS ,  Onyegbule, O ,  Ewa, F. ,  Gutiérrez, J. ,  Ceballos, H. ,  Tohme, Joseph M. ,  Fregene, Martin A. ,  [Bulked segregant analysis identifies molecular markers associated with early bulking in cassava (Manihot esculenta Crantz)] ,  Bulked segregant analysis identifies molecular markers associated with early bulking in cassava (Manihot esculenta Crantz)

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