Correlação do vigor de sementes básicas e rendimento de produção de sementes de milho híbrido

Abstract

A total of 138 seed production fields of maize hybrids from a production company in 2015 in the states of São Paulo, Minas Gerais, Goiás and Mato Grosso were studied, totaling an area of 9208 hectares divided in 40 different hybrids configurations. The basic seed quality data of each field of production were and divided into classes of vigor by cold test, where 43 fields were classified with 90% or greater vigor, 45 with vigor between 85 and 89%, 31 with vigor between 80 and 84% and 19 with vigor below 80%. The production yield data from these fields were surveyed and compared to the targets that served as the basis for planning. The data obtained were submitted to a Pearson correlation and the results indicated that among the classes studied, those with very high vigor (equal or superior to 90%) and high vigor (between 85 and 89%) presented a significant correlation in the association of factors of production, where the results presented a value of 'r' superior to 0,73 in all the interactions. When using seed lots with average vigor classes (between 80 and 84%) and low (below 80%), the interactions are no longer significant in the case of low vigor, but even in the mean vigor, the value of 'r' already passes to be 0.41 and 0.46 for productivity in kilograms and number of seed bags produced respectively associated with the planned values. We conclude that the factors of production do not have association when lots of medium and low vigor seeds are used in the production of hybrid corn seeds.