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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 1994

Autor: Ekanayake, I.J. Ortiz, R. Vuylsteke, D.R.

Leaf age effects on the leaf conductance to water vapour diffusion of the adaxial and abaxial leaf surfaces were measured in the morning and in the afternoon on 17 different plantain and banana (Musa spp.) genotypes. The irradiance levels increased three-fold while leaf to air vapour pressure def...

Enlace original: https://cgspace.cgiar.org/handle/10568/100892

Investigación en Agricultura
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Ekanayake, I.J. ,  Ortiz, R. ,  Vuylsteke, D.R. ,  [Influence of leaf age, soil moisture, VPD and time of day on leaf conductance of various Musa genotypes in a Humid Forest Moist Savanna transition site] ,  Influence of leaf age, soil moisture, VPD and time of day on leaf conductance of various Musa genotypes in a Humid Forest Moist Savanna transition site
Journal Article 2002

Autor: Tenkouano, A. Ortiz, R. Baiyeri, K.

Breeding efforts for genetic improvement of banana and plantain have gradually shifted from individual trait selection to simultaneous improvement of several traits, following an ideotype concept. Therefore, information on the phenotypic and genetic association among these traits, and the influen...

Les efforts d'amélioration génétique du bananier et du bananier-plantain ont graduellement passé de la sélection de caractères individuels à celle simultanée de plusieurs caractères, suivant un concept d'idéotype. Ainsi, il devenu est important pour le sélectionneur Musa de connaître le degré d'a...

Enlace original: https://cgspace.cgiar.org/handle/10568/92751

Investigación en Agricultura
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Tenkouano, A. ,  Ortiz, R. ,  Baiyeri, K. ,  [Phenotypic and genetic correlations in Musa populations in Nigeria] ,  Phenotypic and genetic correlations in Musa populations in Nigeria
Journal Article 1998

Autor: Crouch, H.K. Crouch, J.H. Jarret, Robert L. Cregan, P.B. Ortiz, R.

The triploid genome of plantain (Musa spp., AA group) has been considered intractable to genetic improvement because of the production of putatively homogeneous 2n (= 3.r) gametes. Plantain breeding schemes have been based on the hybridization of 2n megaspores from the triploid plantain and haplo...

Enlace original: https://cgspace.cgiar.org/handle/10568/100972

Investigación en Agricultura
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Crouch, H.K. ,  Crouch, J.H. ,  Jarret, Robert L. ,  Cregan, P.B. ,  Ortiz, R. ,  [Segregation at microsatellite loci in haploid and diploid gametes of Musa] ,  Segregation at microsatellite loci in haploid and diploid gametes of Musa
Journal Article 1998

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

Bunch orientation is an economically important trait in plantain ( Musa spp. AAB group) and banana ( Musa spp. AAA or ABB groups). Pendulous bunches are more symmetrical than subhorizontal, horizontal, or erect bunches and are, therefore, better adapted for transportation. Erect, horizontal, subh...

Enlace original: https://cgspace.cgiar.org/handle/10568/100974

Investigación en Agricultura
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Ortiz, R. ,  Vuylsteke, D.R. ,  [Segregation of bunch orientation in plantain and banana hybrids] ,  Segregation of bunch orientation in plantain and banana hybrids
Journal Article 1995

Autor: Ortiz, R.

Banana (Musa spp.) is an important perennial crop in tropical countries. Testing improved germplasm and/or agronomic practices to increase productivity requires accuracy and precision. The objectives of this study were to determine the optimum plot size (i.e., number of plants per experimental pl...

Enlace original: https://cgspace.cgiar.org/handle/10568/97331

Investigación en Agricultura
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Ortiz, R. ,  [Plot techniques for assessment of bunch weight in banana trials under two systems of crop management] ,  Plot techniques for assessment of bunch weight in banana trials under two systems of crop management
Journal Article 1995

Autor: Ekanayake, I.J. Ortiz, R. Vuylsteke, D.R.

Cultivated plantains and bananas (Musa spp.) are important staple crops in the humid forest and midaltitude ecologies of sub-Saharan Africa. Their water requirement is relatively high and they are very sensitive to dry soil conditions, which greatly limits their range of cultivation. While long-t...

Enlace original: https://cgspace.cgiar.org/handle/10568/97333

Investigación en Agricultura
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Ekanayake, I.J. ,  Ortiz, R. ,  Vuylsteke, D.R. ,  [Physiological factors in drought tolerance of various Musa genotype] ,  Physiological factors in drought tolerance of various Musa genotype
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 1993

Autor: Vuylsteke, D.R. Ortiz, R. Pasberg-Gauhl, C. Gauhl, F. Gold, C. Ferris, S. Speijer, P.
Enlace original: https://cgspace.cgiar.org/handle/10568/97354

Investigación en Agricultura
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Vuylsteke, D.R. ,  Ortiz, R. ,  Pasberg-Gauhl, C. ,  Gauhl, F. ,  Gold, C. ,  Ferris, S. ,  Speijer, P. ,  [Plantain and banana research at the International Institute of Tropical Agriculture] ,  Plantain and banana research at the International Institute of Tropical Agriculture
Journal Article 1996

Autor: Ortiz, R.

Virus-like symptoms (due to banana streak virus, cucumber mosaic virus, or both) have been observed in plants of Musa hybrids (TMPx) and local landraces included in multilocational trials in sub-Saharan Africa. Virus-like symptom incidence in these multilocational trials was analyzed using the ad...

Enlace original: https://cgspace.cgiar.org/handle/10568/97339

Investigación en Agricultura
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Ortiz, R. ,  [The potential of AMMI analysis for field assessment of Musa genotypes to virus infection] ,  The potential of AMMI analysis for field assessment of Musa genotypes to virus infection

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