Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina
The objective of this study was to characterize and compare the protein composition of half-sib families of opaque-2 maize from Argentina through progeny testing. Grain hardness, protein fractions, amino acid content and in vitro protein digestibility (PD) of whole grain flour were determined. Non-o...
| Main Authors: | , , |
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| Format: | Online |
| Language: | eng spa |
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Facultad de Ciencias Agropecuarias
2019
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| Online Access: | https://revistas.unc.edu.ar/index.php/agris/article/view/22682 |
| _version_ | 1802315613362716672 |
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| author | Mansilla, Pablo Sebastián Nazar, María Cristina Pérez, Gabriela Teresa |
| author_facet | Mansilla, Pablo Sebastián Nazar, María Cristina Pérez, Gabriela Teresa |
| author_sort | Mansilla, Pablo Sebastián |
| collection | Portal de Revistas |
| description | The objective of this study was to characterize and compare the protein composition of half-sib families of opaque-2 maize from Argentina through progeny testing. Grain hardness, protein fractions, amino acid content and in vitro protein digestibility (PD) of whole grain flour were determined. Non-opaque genotypes were used as control. Total protein content of o2 genotypes correlated negatively with the grain hardness (r=-42 in 2012 and r=-0.32 in 2013) and did not show significant differences in relation to non-opaque genotypes; however, o2 genotypes showed significantly higher PD, lower zein proportion, and higher albumin, globulin and glutelin contents. The o2progenies showed significantly higher lysine content and higher levels of other essential amino acids, such as isoleucine and threonine compared to white corn. Lysine content, protein fraction contents and PD showed a higher contribution of genetic variance to the total variability, despite the high contribution of crop year variance obtained by total protein content. The differences shown by progeny protein profiles would enable the identification of o2 genotypes with lower zein level and higher lysine content; this allows us to continue the selection and improvement to obtain open-pollination varieties enhanced in terms of protein quality. |
| format | Online |
| id | oai:ojs.revistas.unc.edu.ar:article-22682 |
| institution | Universidad Nacional de Cordoba |
| language | eng spa |
| publishDate | 2019 |
| publisher | Facultad de Ciencias Agropecuarias |
| record_format | ojs |
| spelling | oai:ojs.revistas.unc.edu.ar:article-226822020-03-30T15:26:12Z Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina Evaluación y comparación de la composición y calidad proteica de familias de medios hermanos de maíz opaco-2 (Zea mays L.) de Argentina Mansilla, Pablo Sebastián Nazar, María Cristina Pérez, Gabriela Teresa maíz opaco-2 variedad de polinización libre lisina. opaque-2 maize open-pollinated variety lysine. The objective of this study was to characterize and compare the protein composition of half-sib families of opaque-2 maize from Argentina through progeny testing. Grain hardness, protein fractions, amino acid content and in vitro protein digestibility (PD) of whole grain flour were determined. Non-opaque genotypes were used as control. Total protein content of o2 genotypes correlated negatively with the grain hardness (r=-42 in 2012 and r=-0.32 in 2013) and did not show significant differences in relation to non-opaque genotypes; however, o2 genotypes showed significantly higher PD, lower zein proportion, and higher albumin, globulin and glutelin contents. The o2progenies showed significantly higher lysine content and higher levels of other essential amino acids, such as isoleucine and threonine compared to white corn. Lysine content, protein fraction contents and PD showed a higher contribution of genetic variance to the total variability, despite the high contribution of crop year variance obtained by total protein content. The differences shown by progeny protein profiles would enable the identification of o2 genotypes with lower zein level and higher lysine content; this allows us to continue the selection and improvement to obtain open-pollination varieties enhanced in terms of protein quality. El objetivo fue caracterizar y comparar la composición proteica de familias de medios hermanos de maíz opaco-2 de Argentina mediante prueba de progenie. Se determinó dureza del grano, contenido de fracciones proteicas, aminoácidos y digestibilidad in vitro de proteína (PD) de la harina integral. Se usaron genotipos no-opacos como control. El contenido total de proteína de los genotipos o2 correlacionó negativamente con la dureza del grano (r=-42 en 2012 y r=-0.32 en 2013) y no mostró diferencias significativas respecto a los genotipos no-opacos; sin embargo, los genotipos o2 mostraron mayor PD, menor proporción de zeína y mayor de albúminas, globulinas y glutelinas. Las progenies o2 mostraron mayor contenido de lisina, isoleucina y treonina en comparación con el maíz blanco. El contenido de lisina, el de fracciones proteicas y la PD mostraron una mayor contribución de la varianza genética, a pesar de la alta contribución de la varianza del año observada en el contenido total de proteínas. Las diferencias mostradas por los perfiles de proteínas de las progenies permitirán identificar genotipos o2 con menor nivel de zeína y mayor contenido de lisina. Esto permitirá continuar con la selección y la mejora genética para obtener variedades con calidad proteica superior. Facultad de Ciencias Agropecuarias 2019-06-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/agris/article/view/22682 AgriScientia; Vol. 36 No. 1 (2019); 39-53 AgriScientia; Vol. 36 Núm. 1 (2019); 39-53 1668-298X 10.31047/1668.298x.v36.n1 eng spa https://revistas.unc.edu.ar/index.php/agris/article/view/22682/24085 https://revistas.unc.edu.ar/index.php/agris/article/view/22682/29292 |
| spellingShingle | maíz opaco-2 variedad de polinización libre lisina. opaque-2 maize open-pollinated variety lysine. Mansilla, Pablo Sebastián Nazar, María Cristina Pérez, Gabriela Teresa Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title | Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title_alt | Evaluación y comparación de la composición y calidad proteica de familias de medios hermanos de maíz opaco-2 (Zea mays L.) de Argentina |
| title_full | Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title_fullStr | Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title_full_unstemmed | Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title_short | Evaluation and comparison of protein composition and quality in half-sib families of opaque-2 maize (Zea mays L.) from Argentina |
| title_sort | evaluation and comparison of protein composition and quality in half sib families of opaque 2 maize zea mays l from argentina |
| topic | maíz opaco-2 variedad de polinización libre lisina. opaque-2 maize open-pollinated variety lysine. |
| topic_facet | maíz opaco-2 variedad de polinización libre lisina. opaque-2 maize open-pollinated variety lysine. |
| url | https://revistas.unc.edu.ar/index.php/agris/article/view/22682 |
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