| dc.description.abstract | The objective of this work was to verify whether there are linear relationships between
meteorological variables and phenological, morphological and productive traits of maize
genotypes. Five sowing dates were performed and 71 genotypes were evaluated on September
21, 2021 and 78 genotypes on October 20, 2021, November 20, 2021, December 20, 2021 and
January 30, 2022. Each genotype was phenologically characterized at each sowing date. Plant
height was obtained from the average of five plants per genotype. Grain yield was evaluated
from all plants in the plot, corrected to 13% moisture. With the duration of the phenological
stages, the accumulated global solar radiation and the thermal sum in the vegetative and
reproductive stages were calculated. Descriptive statistics were calculated. Principal component
analysis was applied in order to verify possible formation of groups between sowing dates and
genetic bases. Coefficients of linear variation between pairs of variables in each seeding data
were calculated. The maize genotypes, sown in September, with shorter duration of the
vegetative and reproductive stages, accumulate less global solar radiation and thermal sum and
present greater height and grain yield. The maize genotypes, sown in October, November and
December, which present in the vegetative stage, shorter duration and lower accumulation of
global solar radiation and thermal sum, and in the reproductive stage, greater duration and
greater accumulation of global solar radiation and thermal sum, are the most productive. For
sowings in January, there are no linear associations between meteorological variables and
phenological, morphological and productive traits of maize genotypes. Single, triple, and
double hybrids and maize varieties show similar responses to the effects of meteorological
variables. | |
