Kernel hardness - related traits in response to heat stress during the grain - filling period of maize crops

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Postflowering heat stress causes the arrest of kernel growth, increasing kernel protein concentration and the relative abundance of g-zeins, two biochemical traits contributing to maize (Zea mays L.) hardness. The impact of early and late postflowering heat stress on kernel physical traits related t...

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Detalles Bibliográficos
Autor principal: Mayer, Luis Ignacio
Otros Autores: Cirilo, Alfredo Gabriel, Maddonni, Gustavo Angel
Formato: Artículo
Lenguaje:Inglés
Materias:
HEAT STRESS
MAIZE
CRIOS
GRAIN FILLING
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2019mayer.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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022 |a  0011-183X 
024 |a 10.2135/cropsci2018.04.0245 
040 |a AR-BaUFA  |c AR-BaUFA 
100 1 |9 29342  |a Mayer, Luis Ignacio  |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional La Pampa - San Luis. Estación Experimental Agropecuaria San Luis (EEA San Luis). Villa Mercedes, San Luis, Argentina. 
245 0 0 |a Kernel hardness - related traits in response to heat stress during the grain - filling period of maize crops 
520 |a Postflowering heat stress causes the arrest of kernel growth, increasing kernel protein concentration and the relative abundance of g-zeins, two biochemical traits contributing to maize (Zea mays L.) hardness. The impact of early and late postflowering heat stress on kernel physical traits related to hardness was studied on fieldgrown maize hybrids differing in their prevailing endosperm texture (two hybrids with a vitreous texture, and two others with a floury texture). Kernel texture was softened by heat stress (P smaller than 0.001), as indicated by decreases in traits that are usually positively related to hardness (thousand kernel weight [up to 185 g], proportion of large kernels [up to 50 65 percentage points], kernel or bulk density [up to 7 kg hL−1] and milling ratio [up to 1 g g−1]) and increases in those usually negatively related (proportion of the smaller kernels and floater percentage [up to 30 and 75 percentage points, respectively]). Most of these effects were larger (P smaller than 0.01), as heat stress occurred earlier in the grain-filling period. Kernel physical traits of the genotypes with a predominantly floury texture varied the most (P smaller than 0.05) in response to heat stress. Genotypic and environmental variation effects in most hardness-related traits could be accounted for by kernel density (r2 = 0.74–0.87) or bulk density (r2 = 0.79–0.93). Sowing date and genotype selections should be considered as crop management practices for reducing or preventing the potential impact of heat stress on maize hardness. 
650 |2 Agrovoc  |9 26 
653 |a HEAT STRESS 
653 |a MAIZE 
653 |a CRIOS 
653 |a GRAIN FILLING 
700 1 |a Cirilo, Alfredo Gabriel  |u Instituto Nacional de Tecnología Agropecuaria (INTA).centro Regional Buenos Aires Norte. Estación Experimental Agropecuaria Pergamino (EEA Pergamino). Pergamino, Buenos Aires, Argentina.  |9 5928 
700 1 |a Maddonni, Gustavo Angel  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal. Cátedra de Cerealicultura. Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 7271 
773 0 |t Crop science  |w (AR-BaUFA)SECS000064  |g Vol.59, no.1 (2019), p.318-332, tbls., grafs., fot. 
856 |f 2019mayer  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2019mayer.pdf  |x ARTI202003 
856 |z LINK AL EDITOR  |u https://www.crops.org 
942 |c ARTICULO 
942 |c ENLINEA 
976 |a AAG 

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