autores
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Autores
Mostrando ítems 1-20 de 35
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A practical guide to estimating the light extinction coefficient with nonlinear models—a case study on maize
Lacasa, Josefina; Hefley, Trevor J.; Otegui, María Elena; Ciampitti, Ignacio A. (Springer Nature, 2021-06-12)The fraction of intercepted photosynthetically active radiation (fPARi) is typically described with a non-linear function of leaf area index (LAI) and k, the light extinction coefficient. The parameter k is used to make ... -
Ability of in situ canopy spectroscopy to differentiate genotype by environment interaction in wheat
Arias, Claudia; Montero Bulacio, Enrique; Rigalli, Nicolás; Romagnoli, Martín; Curin, Facundo; Gonzalez, Fernanda Gabriela; Otegui, María Elena; Portapila, Margarita (Taylor & Francis, 2021-03)In recent years, the application of remote sensing techniques is gaining a growing interest and importance in agriculture. Researchers often combine data from near-infrared and red spectral bands according to their specific ... -
Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops
Cagnola, Juan I.; Parco, Martín; Rotili, Diego Hernán; Ploschuk, Edmundo L.; Curin, Facundo; Amas, Juan Ignacio; Luque, Sergio F.; Maddonni, Gustavo Angel; Otegui, María Elena; Casal, Jorge José (Oxford University Press, 2021-03)Identifying the physiological traits indirectly selected during the search for high-yielding maize hybrids is useful for guiding further improvements. To investigate such traits, in this study we focused on the critical ... -
Breeding effects on canopy light attenuation in maize: a retrospective and prospective analysis
Lacasa, Josefina; Ciampitti, Ignacio A.; Amas, Juan Ignacio; Curín, Facundo; Luque, Sergio F.; Otegui, María Elena (Oxford University Press, 2022-03)The light attenuation process within a plant canopy defines energy capture and vertical distribution of light and nitrogen (N). The vertical light distribution can be quantitatively described with the extinction coefficient ... -
Chapter 1 - Maize
Otegui, María Elena; Cirilo, Alfredo Gabriel; Uhart, Sergio Adolfo; Andrade, Fernando Hector (Academic Press, 2020-12)Maize is presently the grain crop that covers the largest cultivated area, has the largest production, and the largest grain yield worldwide. In recent years, maize occupied an important part of the land previously cropped ... -
Classification of argentine maize landraces in heterotic groups
Delucchi, Carla; Eyherabide, Guillermo; Lorea, Roberto Daniel; Presello, Daniel Alberto; Otegui, María Elena; López, César G. (Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, 2012)The genetic diversity of maize (Zea mays L) is a valuable and strategic natural resource that plays a key role in the breeding progress. However, exploitation of genetic variability from landraces has not reached a significant ... -
Diallel analysis of kernel weight and grain-filling traits in maize grown under contrasting nitrogen supply
Hisse, Ignacio R.; D’Andrea, Karina Elizabeth; Otegui, María Elena (Wiley, 2023-02)Understanding the inheritance of maize (Zea mays L.) kernel weight (KW) under contrasting nitrogen (N) supply is crucial for obtaining high KW across diverse N conditions. This work evaluated broad-sense heritability (H2), ... -
Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
Rossini, María; Curin, Facundo; Otegui, María Elena (Elsevier, 2023-12)Context or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such ... -
Ecophysiological traits in maize hybrids and their parental inbred lines: Phenotyping of responses to contrasting nitrogen supply levels
D'Andrea, Karina Elizabeth; Otegui, María Elena; Cirilo, Alfredo Gabriel; Eyherabide, Guillermo (Elsevier, 2009-10)Maize (Zea mays L.) breeding based primarily on final grain yield has been successful in improving this trait since the introduction of hybrids. Contrarily, understanding of the variation in ecophysiological processes ... -
Efecto de cuatro décadas de mejoramiento genético de soja para el norte de Buenos Aires
Ávalos, Selva; Zujic, Santiago; Lozano, María; Cirilo, Alfredo Gabriel; Otegui, María Elena (2017-12)La ganancia genética del rendimiento en soja resultó nula para variedades liberadas en las últimas cuatro décadas en el Norte de Buenos Aires. No hubo progreso genético para sus componentes numéricos, los determinantes ... -
Efectos del mejoramiento génetico sobre el rendimiento y sus determinantes
D’ Andrea, Karina; Hisse, Ignacio; Galizia, Luciana Ayelen; Otegui, María Elena (MAIZAR, Asociación Maíz y Sorgo Argentino, 2023)El mejoramiento genético de maíz en las últimas décadas ha contribuido, junto con el manejo, a sostener la ganancia global de RG. La mejora se observó tanto en ambientes de alta producción como en aquellos con limitada ... -
Eficiencia de uso del agua de cultivares de soja desarrollados para La Pampa central Argentina: efectos del mejoramiento genético y del ambiente
Avalos Brítez, S.R.; Severini, Alan David; Cirilo, Alfredo Gabriel; Otegui, María Elena (Asociación de la Cadena de la Soja Argentina, 2019-09)En los próximos años se prevé un aumento importante en la demanda mundial de alimentos como producto de un incremento de la población. Para cubrir esa demanda, la producción deberá aumentar a casi el doble (Ray et al., ... -
Evaluación de variedades locales de maíz [Zea mays L.] en relación con distintos grupos heteróticos utilizando caracteres biométricos y moleculares
Delucchi, Carla (Facultad de Agronomía, Universidad de Buenos Aires, 2009-12)La diversidad genética del maíz (Zea mayz L.) es un recurso natural de valor estratégico, que cumple una función fundamental en el continuo mejoramiento genético del cultivo. La explotación de las variedades locales no ha ... -
Expressing the sunflower transcription factor HaHB11 in maize improves waterlogging and defoliation tolerance
Raineri, Jesica; Caraballo, Luciano; Rigalli, Nicolás; Portapila, Margarita; Otegui, María Elena; Lía Chan, Raquel (Oxford University Press, 2022-05)The sunflower (Helianthus annuus) transcription factor HaHB11 (H. annuus Homeobox 11) belongs to the homeodomain-leucine zipper family and confers improved yield to maize (Zea mays) hybrids (HiII × B73) and lines. Here we ... -
Fecha de siembra
Otegui, María Elena; Andrade, Fernando Hector; Cirilo, Alfredo Gabriel; Mercau, Jorge Luis (MAIZAR, Asociación Maíz y Sorgo Argentino, 2023)En el presente capítulo se analizan los efectos de la modificación de la fecha de siembra sobre el desarrollo, el crecimiento y el rendimiento del cultivo de maíz. -
Field-grown transgenic wheat expressing the sunflower gene HaHB4 significantly outyields the wild type
Gonzalez, Fernanda Gabriela; Capella, Matías; Ribichich, Karina Fabiana; Curín, Facundo; Giacomelli, Jorge Ignacio; Ayala, Francisco; Watson, Gerónimo; Otegui, María Elena; Lía Chan, Raquel (2019-02)HaHB4 is a sunflower transcription factor belonging to the homeodomain-leucine zipper I family whose ectopic expression in Arabidopsis triggers drought tolerance. The use of PCR to clone the HaHB4 coding sequence for wheat ... -
Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
Luque, Sergio F.; Cirilo, Alfredo Gabriel; Otegui, María Elena (Elsevier, 2006-02)Genetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. ... -
Kernel weight in maize: genetic control of its physiological and compositional determinants in a dent × flint-caribbean RIL population
Mandolino, Cecilia Ines; D´Andrea, Karina Elizabeth; Piedra, Carlina V.; Alvarez Prado, Santiago; Olmos, Sofía Eugenia; Cirilo, Alfredo Gabriel; Otegui, María Elena (Maydica-ist Sper Cerealicoltur, 2016-12)The genetic control of maize kernel weight (KW) determination could be studied through its physiological and/ or compositional determinants. Our objective was to dissect the genetic control of maize KW by analyzing its ... -
Kernel weight responses to the photo-thermal environment in maize dent × flint and flint × flint hybrids
Hisse, Ignacio R.; D´Andrea, Karina Elizabeth; Otegui, María Elena (American Society of Agronomy, 2021-02)Maize (Zea mays, L.) grain yield is assumed to be source limited during the flowering period but sink limited during grain growth; however, environmental restrictions during active grain filling may strongly affect final ... -
Llenado y secado de granos de cuatro híbridos de maíz cultivados en fecha de siembra contrastantes en la zona núcleo maicera.
Amas, Juan Ignacio; Chazarreta, Yésica D.; Otegui, María Elena; Cirilo, Alfredo Gabriel (2017-09)La elección de la fecha de siembra del cultivo de maíz determina la duración y el momento de ocurrencia de las diferentes etapas de su ciclo ontogénico (4). El atraso de la siembra expone al llenado de granos a menor ...