Abstract

ESPINOSA-CALDERON, Alejandro et al. Despanojado y densidad de la población en una cruza simple androestéril y fértil de maíz. Agron. Mesoam [online]. 2010, vol.21, n.1, pp.159-165. ISSN 2215-3608.

De-tasseling and plant density in a single androsterile and fertile cross of maize. The objective of this work was to determine the effect of de-tasseling on the productivity of single crosses of maize. An experiment was established the spring - summer seasons of year 2004 in Rancho Almaraz of the Faculty of Superior Studies in Cuautitlán of the National Autonomous University of Mexico (FESC-UNAM) located at 2,240 masl in Cuautitlán Izcalli, Mexico. A randomized complete block design was used in the field that included three repetitions. Statistical analysis was carried out in as a factorial considering the factors genotype (2), population density (3) and the treatment of de-tasseling and without detasseling (2), as well as the interactions. Grain yield showed highly statistical differences for de-tasseling, and significant differences for genotype and population density, and the interaction de-tasseling x population density. The single cross version male sterile produced 8,873 kg/hectare, 17.9% higher than the fertile version, which yielded 7,521 kg/h. The population density of 80,000 plants/h and yield of 9,640 kg/h was statistically higher than the yield obtained with 50 000 plants/ha (7193 kg/h). The check without de-tasseling (9,429 kg/h) was statistically superior than the de-tasseling.

Keywords : Zea mays; androsterility; seed production.

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