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Journal Article 1994

Autor: Ortiz, R. Vuylsteke, D.R.

Secondary triploids were produced by crossing primary tetraploids with selected diploid partners and the parthenocarpic banana (Galeo). Comparisons between secondary tetraploids and secondary triploids showed that the secondary tetraploids generally had lower yields than secondary triploids. The ...

Enlace original: https://cgspace.cgiar.org/handle/10568/100900

Investigación en Agricultura
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Ortiz, R. ,  Vuylsteke, D.R. ,  [Preliminary evaluation of secondary Musa polyploids at IITA breeding station] ,  Preliminary evaluation of secondary Musa polyploids at IITA breeding station
Journal Article 1996

Autor: Ortiz, R. Vuylsteke, D.R.

Banana(Musa spp. L.) breeding, aiming to develop pest resistant cultivars for the export trade, started about 75 years ago in the West Indies. However, all banana exported today are still farmers' selection from somatic mutants of the group of Cavendish, and have a very narrow genetic base. In th...

Enlace original: https://cgspace.cgiar.org/handle/10568/95929

Investigación en Agricultura
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Ortiz, R. ,  Vuylsteke, D.R. ,  [Recent advances in Musa genetics, breeding and biotechnology] ,  Recent advances in Musa genetics, breeding and biotechnology
Journal Article 2003-06

Autor: Tenkouano, A. Vuylsteke, D.R. Okoro, J. Makumbi, Dan Swennen, R. Ortiz, R.
Enlace original: https://cgspace.cgiar.org/handle/10568/96355

Investigación en Agricultura
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Tenkouano, A. ,  Vuylsteke, D.R. ,  Okoro, J. ,  Makumbi, Dan ,  Swennen, R. ,  Ortiz, R. ,  [Diploid banana hybrids TMB2x51051 and TMB2x91283 with good combining ability, resistance to black sigatoka and nematodes] ,  Diploid banana hybrids TMB2x51051 and TMB2x91283 with good combining ability, resistance to black sigatoka and nematodes
Journal Article 1995

Autor: Ortiz, R. Vuylsteke, D.R. Cauwer, I. de

A multilocational evaluation trial comprising 18 Musa genotypes was carried out from 1991to1994 in three respective locations in Humid Forest (Onne, Nigeria and M' Balmayo, Cameroon) and the Forest- Savanna Transition (Ibadan, Nigeria) zones of West and Central Africa.

Une essai multilocal comprenant 18 genetype de Musa a ete counduit de 1991 a 1994 dans 3 sites representatives dan la foret humide (Onne, Nigeria and M'Balmayo, cameroun) et dans la zone de transition Foret-Savanne (Ibadan, Nigeria) en Afrique de l'Ouest et Centrale.

Enlace original: https://cgspace.cgiar.org/handle/10568/97332

Investigación en Agricultura
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Ortiz, R. ,  Vuylsteke, D.R. ,  Cauwer, I. de ,  [Genotype-by-environment interaction and phenotypic stability of Musa gemplasm in West and Central Africa] ,  Genotype-by-environment interaction and phenotypic stability of Musa gemplasm in West and Central Africa
Journal Article 1995

Autor: Vandenhout, H. Ortiz, R. Vuylsteke, D.R. Swennen, R. Bai, K.

Ploidy polymorphism occurs in the hybrid offspring derived from interspecific crosses between triploid plantains (Musa spp. AAB group) and diploid bananas (M. acuminata). Therefore, Musa breeders are interested in the determination of ploidy and its effects on phenotypic expression of quantitativ...

Enlace original: https://cgspace.cgiar.org/handle/10568/97404

Investigación en Agricultura
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Vandenhout, H. ,  Ortiz, R. ,  Vuylsteke, D.R. ,  Swennen, R. ,  Bai, K. ,  [Effect of ploidy on stomatal and other quantitative traits in plantain and banana hybrids] ,  Effect of ploidy on stomatal and other quantitative traits in plantain and banana hybrids
Journal Article 2007

Autor: Mahalakshmi, V. Ng, Q. Atalobhor, J. Ogunsola, D. Lawson, M. Ortiz, R.

Yams (Dioscorea spp.) are important crops in some West African locations. The West African yam collections held at the IITA were characterized using the standard descriptor list for this crop (IPGRI/IITA. 1997. Descriptors for yam (Dioscorea spp.). International Institute of Tropical Agriculture,...

Enlace original: https://cgspace.cgiar.org/handle/10568/91461

Investigación en Agricultura
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Mahalakshmi, V. ,  Ng, Q. ,  Atalobhor, J. ,  Ogunsola, D. ,  Lawson, M. ,  Ortiz, R. ,  [Development of a West African yam Dioscorea spp. core collection] ,  Development of a West African yam Dioscorea spp. core collection
Journal Article 1999

Autor: Ferris, R.S.B. Ortiz, R. Vuylsteke, D.R.

Triploid plantains (Musa AAB) are among the most important horticultural crops of West Africa. However, all landraces are susceptible to black Sigatoka, a fungal disease caused by Mycosphaerella fijiensis, Morelet. To ameliorate the spread of this epidemic, exotic triploid cooking bananas (ABB), ...

Enlace original: https://cgspace.cgiar.org/handle/10568/98054

Investigación en Agricultura
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Ferris, R.S.B. ,  Ortiz, R. ,  Vuylsteke, D.R. ,  [Fruit quality evaluation of plantains, plantain hybrids, and cooking bananas] ,  Fruit quality evaluation of plantains, plantain hybrids, and cooking bananas
Journal Article 2003

Autor: Ortiz, R. Golmirzaie, A.M.

The aim of this research was to determine the genetic variation available in some important characteristics for true potato seed breeding in intermediate and advanced stages of a breeding population developed by the Centro Internacional de la Papa. A factorial mating design was used to calculate ...

Enlace original: https://cgspace.cgiar.org/handle/10568/97986

Investigación en Agricultura
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Ortiz, R. ,  Golmirzaie, A.M. ,  [Genetic parameters for agronomic characteristics: II: intermediate and advanced stages in a Open Access potato seed breeding population] ,  Genetic parameters for agronomic characteristics: II: intermediate and advanced stages in a Open Access potato seed breeding population
Journal Article 2003

Autor: Ortiz, R. Golmirzaie, A.M.

The original variation in the source population as well as the selection method may influence the genetic variation in further cycles of genetic improvement. Therefore, the objectives of this research were to determine genetic parameters (variance components and heritability) in source and interm...

Enlace original: https://cgspace.cgiar.org/handle/10568/97985

Investigación en Agricultura
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Ortiz, R. ,  Golmirzaie, A.M. ,  [Genetic parameters for agronomic characteristics: 1: early and intermediate breeding populations of Open Access potato seed] ,  Genetic parameters for agronomic characteristics: 1: early and intermediate breeding populations of Open Access potato seed
Journal Article 2003

Autor: Ortiz, R.

Cowpea is the most important product in African dryland agriculture. Its protein-rich grains are the main product of the crop, which are commonly eaten in different forms by rural and urban peoples. African farmers growing cowpea in their fields often harvest low yields because many biotic and ab...

Enlace original: https://cgspace.cgiar.org/handle/10568/97984

Investigación en Agricultura
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Ortiz, R. ,  [An international public partnership for genetic enhancement of cowpea using a holistic approach to biotechnology] ,  An international public partnership for genetic enhancement of cowpea using a holistic approach to biotechnology

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