LA PRODUCCION DE MAIZ FLINT DEBE ENFOCARSE EN LOS AMBIENTES DE MAYOR INDICE AMBIENTAL

GERDE, J.A.; BORRÁS, L.; ALVAREZ PRADO, S.; SEGUÍ, M.; GAMBÍN, B.L.

Pergamino

Congreso; MAIZIFICANDO CONCIENCIA. XII Congreso Nacional de Maiz; 2022

AIANBA

Argentinean flint maize is known for its grain hardness, and is used by the dry milling industry to produce food products. Commercial flint genotypes currently used have field physical yields that are 10 to 30% lower than those from regular semi-dent genotypes. Our purpose was to further evaluate yield gap differences between flint and semi-dent kernel type genotypes across a wide range of environments in early and late sowing dates. We tested 49 commercial genotypes during seven years from 2014 to 2021, and all years but one had an early and a late sowing date. Flint genotypes yielded less than semi-dents across all the environments tested, and large genotype differences within each kernel type were evident. The relative difference between flint and semi-dent kernel types were larger in the poorest yielding environments, in agreement with previous results, and this yield gap showed no differences between early and late sowing dates. These results help reinforce that flint production needs to avoid lower yielding environments.