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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 ... -
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 ... -
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 ... -
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., ... -
Eficiencia en el uso del agua del cultivo de soja a través de ambientes con productividad contrastante de Argentina
Riglos, M.M.; Mercau, Jorge Luis; Mayer, L.I.; Haro Juarez, Ricardo Javier; Severina, Ignacio; Cirilo, Alfredo Gabriel; Otegui, María Elena (Asociación de la Cadena de la Soja Argentina, 2019-09)El incremento productivo de la Argentina de las últimas décadas respondió fuertemente al aumento en la superficie cultivada, principalmente hacia áreas consideradas marginales, y la sustitución de cultivos invernales por ... -
Environmental effects on seed yield determination of irrigated peanut crops: links with radiation use efficiency and crop growth rate
Haro Juarez, Ricardo Javier; Otegui, María Elena; Collino, Daniel; Dardanelli, Julio Luis (Elsevier, 2007-08-12)In Argentina, delayed sowing causes a decrease in seed yield and in radiation use efficiency (RUE) of peanut crops (Arachis hypogaea L.), but it is not known if RUE reduction is mainly due to reduced temperature during ... -
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 ... -
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 ... -
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 ... -
Llenado y secado del grano en híbridos de maíz liberados entre 1980 y 2016 : efectos de la fecha de siembra
Chazarreta, Yésica D.; Amas, Juan Ignacio; Cirilo, Alfredo Gabriel; Otegui, María Elena (Ediciones INTA, 2018-12)El atraso en la fecha de siembra (FS) produce cambios en los parámetros que caracterizan las dinámicas de llenado y secado de los granos. Se destaca el mayor porcentaje de humedad del grano en madurez fisiológica (R6) en ... -
Maize genetic progress in the central Pampas of Argentina: effects of contrasting sowing dates
Amas, Juan Ignacio; Fernandez, Javier A.; Curin, Facundo; Cirilo, Alfredo Gabriel; Ciampitti, Ignacio A.; Otegui, María Elena (Elsevier, 2022-05)Delayed sowing date of maize (Zea mays L.) has become a broadly adopted practice in the Pampas region of Argentina, because late-sown crops frequently experience a more favorable water balance around flowering and a reduction ... -
Maize Nitrogen Use Efficiency: QTL Mapping in a U.S. Dent x Argentine-Caribbean Flint RILs population
Mandolino, Cecilia Ines; D'Andrea, Karina Elizabeth; Olmos, Sofía Eugenia; Otegui, María Elena; Eyherabide, Guillermo (2018-04)This study was aimed to identify quantitative trait loci (QTL) for nitrogen use efficiency (NUE) and related traits in a maize population derived from a cross between two lines with different genetic background (B100 and ... -
Phenotypic plasticity for biomass partitioning in maize : genotype effects across a range of environments
Galizia, Luciana Ayelen; Munaro, Eugenia M.; Cirilo, Alfredo Gabriel; Otegui, María Elena; D’Andrea, Karina E. (Elsevier, 2020-10)El rendimiento en grano de maíz está determinado por el genotipo (G), el ambiente (E) y los efectos de la interacción G × E que influyen en la expresión de los rasgos a lo largo del ciclo del cultivo. Líneas endocriadas e ... -
Phenotypic plasticity of maize grain yield and related secondary traits: Differences between inbreds and hybrids in response to contrasting water and nitrogen regimes
Ruiz, Monica Beatriz; D'Andrea, Karina Elizabeth; Otegui, María Elena (Elsevier, 2019-06)Correct characterization of heritability and phenotypic plasticity (PP) is critical for breeding purposes. The latter refers to the variation range of a trait in response to changes in the environment and has been assessed ...