Momento de colheita, qualidade fisiológica e produtividade de sementes de diferentes genótipos de milho

Abstract

The quality of seed produced from each seed producing company the main market strategy. Thus, it is important to know the merits of each genotype to identify the best time to harvest. Environmental factors after physiological maturity of seeds are very harmful to the physiological quality, exposing the seeds to deterioration in the field. Were evaluated in this study five corn genotypes for seed production, two hybrids, a modified strain and two inbred lines in two different harvest times. The vigour of the seeds was analized separetaly according to their location in the ear, if the tip or the base. Significant differences for all parameters examined and especially the interaction between the genotype and the force measured by the test cold. It was also shown the differences of vigour depending on the location of the spike and the seed of the harvest season.