Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2
Differences in the distribution of physical fractions and of nitrogen in maize samples of normal genetic composition, as well as in Opaque-2 and Floury-2 maize are reported. The results indicate that Opaque-2 maize contains a larger germ than a normal maize, and that it contributes greater amounts o...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
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Instituto Interamericano de Cooperación para la Agricultura (IICA)
2025
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| Materias: | |
| Acceso en línea: | https://repositorio.catie.ac.cr/handle/11554/13040 |
| _version_ | 1855487968451493888 |
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| author | Gómez Brenes, R. Nettleton, J. A Núñez, M. J Olivares, M. J Poey, Federico BRESSANI, R. |
| author_browse | BRESSANI, R. Gómez Brenes, R. Nettleton, J. A Núñez, M. J Olivares, M. J Poey, Federico |
| author_facet | Gómez Brenes, R. Nettleton, J. A Núñez, M. J Olivares, M. J Poey, Federico BRESSANI, R. |
| author_sort | Gómez Brenes, R. |
| collection | Repositorio CATIE |
| description | Differences in the distribution of physical fractions and of nitrogen in maize samples of normal genetic composition, as well as in Opaque-2 and Floury-2 maize are reported. The results indicate that Opaque-2 maize contains a larger germ than a normal maize, and that it contributes greater amounts of nitrogen. This, together with a greater content of lysine and tryptophan in the endosperm of Opaque-2 maize than in the normal grain, may explain the significantly higher-quality value of the protein of Opaque-2 in comparison with that of the normal samples. Floury-2 maize also has a large-germ, wich is propably the responsible factor of the higher protein content of the kernel, although not as significant as that found in Opaque-2 maize.
A fast chemical methodology useful to detect differences between normal and Opaque-2 maize requiring only small amounts of samples is also presented. The study reavealed that a nitrogen fraction, at present called "non protein nitrogen fraction" and free lysine are contained in significantly greater amounts in Opaque-2 than in normal maize.
Biological tests carried out in rats confirmed the greater PER values of Opaque-2 maize in comparison with those of normal and Floury-2 samples. Likewise, those animals fed maize, had slightly lower blood urea levels when Opaque-2 was administered than when normal or Floury-2 maize were used as rations. However, at present this method is not sufficiently sensitive to use as a screening tool for the selection of varieties of improved nutritive value. |
| format | Artículo |
| id | RepoCATIE13040 |
| institution | Centro Agronómico Tropical de Investigación y Enseñanza |
| language | Español |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| publisherStr | Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| record_format | dspace |
| spelling | RepoCATIE130402025-06-28T22:14:14Z Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 Gómez Brenes, R. Nettleton, J. A Núñez, M. J Olivares, M. J Poey, Federico BRESSANI, R. Maíz||maize||milho||maïs Propiedad fisicoquímica||chemicophysical properties||propriedade físico-química||propriété physicochimique América Latina||Latin America||America Latina||Amérique latine Valor nutritivo||nutritive value||valor nutritivo||valeur nutritive Sede Central Differences in the distribution of physical fractions and of nitrogen in maize samples of normal genetic composition, as well as in Opaque-2 and Floury-2 maize are reported. The results indicate that Opaque-2 maize contains a larger germ than a normal maize, and that it contributes greater amounts of nitrogen. This, together with a greater content of lysine and tryptophan in the endosperm of Opaque-2 maize than in the normal grain, may explain the significantly higher-quality value of the protein of Opaque-2 in comparison with that of the normal samples. Floury-2 maize also has a large-germ, wich is propably the responsible factor of the higher protein content of the kernel, although not as significant as that found in Opaque-2 maize. A fast chemical methodology useful to detect differences between normal and Opaque-2 maize requiring only small amounts of samples is also presented. The study reavealed that a nitrogen fraction, at present called "non protein nitrogen fraction" and free lysine are contained in significantly greater amounts in Opaque-2 than in normal maize. Biological tests carried out in rats confirmed the greater PER values of Opaque-2 maize in comparison with those of normal and Floury-2 samples. Likewise, those animals fed maize, had slightly lower blood urea levels when Opaque-2 was administered than when normal or Floury-2 maize were used as rations. However, at present this method is not sufficiently sensitive to use as a screening tool for the selection of varieties of improved nutritive value. 2025-06-24T19:51:53Z 2025-06-24T19:51:53Z 1973-10 Artículo https://repositorio.catie.ac.cr/handle/11554/13040 openAccess es Turrialba; Vol.23, no. 4 9 páginas application/pdf Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| spellingShingle | Maíz||maize||milho||maïs Propiedad fisicoquímica||chemicophysical properties||propriedade físico-química||propriété physicochimique América Latina||Latin America||America Latina||Amérique latine Valor nutritivo||nutritive value||valor nutritivo||valeur nutritive Sede Central Gómez Brenes, R. Nettleton, J. A Núñez, M. J Olivares, M. J Poey, Federico BRESSANI, R. Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title | Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title_full | Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title_fullStr | Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title_full_unstemmed | Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title_short | Relaciones entre algunas características físicas, químicas y nutricionales de maíces latinoamericanos normales y con el gel Opaco-2 y Harinoso-2 |
| title_sort | relaciones entre algunas caracteristicas fisicas quimicas y nutricionales de maices latinoamericanos normales y con el gel opaco 2 y harinoso 2 |
| topic | Maíz||maize||milho||maïs Propiedad fisicoquímica||chemicophysical properties||propriedade físico-química||propriété physicochimique América Latina||Latin America||America Latina||Amérique latine Valor nutritivo||nutritive value||valor nutritivo||valeur nutritive Sede Central |
| url | https://repositorio.catie.ac.cr/handle/11554/13040 |
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