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Journal Article 1994

Autor: Watanabe, K. Orillo, M. Iwanaga, Masaru Ortiz, R. Freyre, R. Perez, S.

Diploid cultivated species, haploids derived from tetraploid cultivars, and their wildSolanum relatives were used to generate various diploid potato genetic stocks. These stocks have significant value in potato breeding because: 1) genetic diversity in the potato population can be kept variable w...

Enlace original: https://cgspace.cgiar.org/handle/10568/100899

Investigación en Agricultura
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Watanabe, K. ,  Orillo, M. ,  Iwanaga, Masaru ,  Ortiz, R. ,  Freyre, R. ,  Perez, S. ,  [Diploid potato germplasm derived from wild and landrace genetic resources] ,  Diploid potato germplasm derived from wild and landrace genetic resources
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 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 1994

Autor: Ortiz, R. Peloquin, S.

Quantitative variation for pollen stainability was examined in both tetraploid × diploid and tetraploid × tetraploid families of potato (Solanum tuberosum L.). The diploid parents, which were highly heterozygous, produced first division restitution (FDR) 2n pollen. The families used were not affe...

Enlace original: https://cgspace.cgiar.org/handle/10568/97373

Investigación en Agricultura
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Ortiz, R. ,  Peloquin, S. ,  [Effect of sporophytic heterozygosity on the male gametophyte of the tetraploid potato (Solanum tuberosum)] ,  Effect of sporophytic heterozygosity on the male gametophyte of the tetraploid potato (Solanum tuberosum)
Journal Article 2000

Autor: Korie, S. Walker, P. Ortiz, R. Vuylsteke, D.R. Ferris, R.S.B.

Recent successes in the conventional cross-breeding of plantains and cooking bananas by genetic improvement programmes will inevitably lead to an increase in the number of new clones that require testing before release to farmers. In most cases testing focused on disease resistance and yield but ...

Enlace original: https://cgspace.cgiar.org/handle/10568/99897

Investigación en Agricultura
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Korie, S. ,  Walker, P. ,  Ortiz, R. ,  Vuylsteke, D.R. ,  Ferris, R.S.B. ,  [Statistical tools to evaluate sensory data fro testing fruit quality of Musa] ,  Statistical tools to evaluate sensory data fro testing fruit quality of Musa
Journal Article 2000

Autor: Ortiz, R.

Scientific strategies for crop improvement ensue from genetic knowledge gain from the relevant breeding populations. Few genetic studies were undertaken in Musa before the 1990s, despite the importance of the crop in human diet in the tropics. It was believed that genetic studies of most cultivat...

Enlace original: https://cgspace.cgiar.org/handle/10568/99893

Investigación en Agricultura
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Ortiz, R. ,  [Undesrtanding the Musa genome: an update] ,  Undesrtanding the Musa genome: an update
Journal Article 2001

Autor: Ortiz, R. Mohamed, S.F. Madsen, S. Weibull, J. Christiansen, J.L.

Phenotypic diversity for agronomic characteristics was determined in an experiment without fertilizer in 1998 in 41 two-row and 21 six-row winter barley accessions, provided by the Nordic Gene Bank, at Højbakkegård (Denmark). There were significant differences among these 62 accessions for spring...

Enlace original: https://cgspace.cgiar.org/handle/10568/104024

Investigación en Agricultura
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Ortiz, R. ,  Mohamed, S.F. ,  Madsen, S. ,  Weibull, J. ,  Christiansen, J.L. ,  [Assessment of phenotypic variation of winter barley in Scandinavia] ,  Assessment of phenotypic variation of winter barley in Scandinavia
Journal Article 1996

Autor: Ortiz, R.

The aim of the work was to study the genetic origin of the persistence of male bracts and neutral flowers in diploid bananas bred by crossing diploids and tetraploids. The genetic system proposed for somaclonal variation and evolution in triploid bananas is described. [L'objectif du travail a con...

Enlace original: https://cgspace.cgiar.org/handle/10568/101008

Investigación en Agricultura
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Ortiz, R. ,  [Segregation for persistent neutral (Hermaphrodite) flowers and male bracts in plantain-banana hybrids] ,  Segregation for persistent neutral (Hermaphrodite) flowers and male bracts in plantain-banana hybrids
Journal Article 1994

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

Black sigatoka (Mycosphaerella fijiensis Morelet), an airborne fungal leaf-spot disease, is a major constraint to plantain and banana (Musa spp.) production world-wide. Gaining further knowledge of the genetics of host-plant resistance will enhance the development of resistant cultivars, which is...

Enlace original: https://cgspace.cgiar.org/handle/10568/100924

Investigación en Agricultura
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Ortiz, R. ,  Vuylsteke, D.R. ,  [Inheritance of black sigatoka disease resistance in plantainbanana (Musa spp.) hybrids] ,  Inheritance of black sigatoka disease resistance in plantainbanana (Musa spp.) hybrids

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