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Andean maize in Argentina : physiological effects related with altitude, genetic variation, management practices and possible avenues to improve yield
Salve, Diego Antonio; Ferreyra, Mariana Jimena; Defacio, Raquel Alicia; Maydup, María L.; Lauff, Diana B.; Tambussi, Eduardo A.; Antonietta, Mariana (Maximum Academic Press, 2023-11)In the Argentinean Andean region, maize is a main staple being cropped up to 3,900 m above sea level (masl). Yields are limited by the sharp decrease in temperature associated with altitude but also by a lack of management ... -
Cómo caracterizar la variación en el carácter staygreen de maíz y análisis de posibles ventajas en altas densidades de siembra
Antonietta, Mariana; Giron, Paula; Guiamet, Juan José (Estación Experimental Agropecuaria General Villegas, INTA, 2021)En maíz, el mejoramiento genético ha estado acompañado de cambios en el manejo, entre los que se destaca un aumento en la densidad de plantas a un ritmo de aproximadamente 1000 pl ha-1 año-1 (Duvick, 2005). Además, los ... -
Leaf protein allocation across the canopy and during senescence in earlier and later senescing maize hybrids, and implications for the use of chlorophyll as a proxy of leaf N
Antonietta, Mariana; Giron, Paula; Costa, María Lorenza; Guiamet, Juan José (Springer, 2019-09)Leaf chlorophyll (chl) and protein distribution were analyzed throughout grain filling in four modern maize hybrids with contrasting senescence behavior, at three different canopy levels and at low-N (LN, 18 kg N ha−1) and ... -
Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize
Antonietta, Mariana; Acciaresi, Horacio Abel; Guiamet, Juan José (2016-06)Breeding has developed better yielding maize hybrids for low N environments, which also have delayed leaf senescence (‘stay green’ trait, SG). Here, we studied whether the SG trait can further improve yield of modern hybrids ... -
Yield determinants, root distribution and soil water uptake in maize (Zea mays) hybrids differing in canopy senescence under post-silking drought
Antonietta, Mariana; Maydup, María Luján; Cano, María Gabriela; Fanello, Diego Darío; Acciaresi, Horacio Abel; Guiamet, Juan José (CSIRO Publishing, 2021-05)Delayed canopy senescence or ‘stay-green’ (SG) trait in maize (Zea mays L.) could improve drought tolerance. Two field trials comparing four to six maize hybrids with different senescence rate were carried out at Buenos ...