This work was carried out with the objective of testing the comparative efficiency of
different tests in the physiological quality of corn seeds (Zea mays L.), looking for information that may
indicate options to better utilization by this quality control test, as well to verify the relations with the
field emergency. To do that, was valued seeds of six lots, cultivar BR-106, by the germination test, first
count germination, electrical conductivity, accelerated aging, cold without soil, field emergency, and
seedling length under hydric levels at zero; -0,3 and -0,9MPa matric potentials. The trials were carried
out in a completely randmized desing with four replications. The results indicated that the electrical
conductivity test, accelerated aging, cold without soil and seedling length under stress at -0.6MPa were
effective to detect differences of physiological quality among lots of corn seeds, and at the same time
show the biggest levels of correlation with the emergency.