The objective of this work was to study the electrical conductivity and potassium
leaching tests, in four sunflower genotypes seeds (IAC-Iarama, V-2000, M-742 and C-11). Four
replications of 50 seeds/genotype were soaked for 16, 20, 24, 28 and 32 hours, at 25 and 30ºC.
The initial seed quality was determined by weight of 100 seeds, germination, first germination
count and accelerated aging tests. The results of these tests were significant correlation to the
seedlings emergence in the field. It was observed a genotype effect for the conductivity and
potassium leaching tests and inverse classification for genotype vigor relatead to other physiological
quality tests. There was not significant correlation between the seedlings emergence test in the
field and electrical conductivity and potassium leaching tests. The electrical conductivity and
potassium leaching tests were not effective to evaluate the seeds of sunflower genotypes.