The research was carried out in the Laboratory of Seeds Analysis of the Crop Science
and Plant Breeding Department of the Faculty of Agriculture UNESP, Botucatu, SP, Brazil, with the
purpose of studying the genotype effect on the results of the electrical conductivity test, for evaluating
the vigor of peanut seeds (Arachis hypogaea L). The treatments were set in a completely randomized
design. The electrical conductivity of six peanut genotypes (?Oirã?, ?Tupã?, ?Poitara?, ?Caiapó?, ?Tatu
Branco? and ?Tatu?) seeds was evaluated in four replicates of 25 seeds without injures each, after 24
hours of seed imbibition in 75ml of deionized water at 20ºC. The reading of electrical condutivity was
done by a conductivimeter and the results were expressed as Scmg. The genotype initial seed
moisture content was adjusted to approximately 7%. Before and at end of electrical conductivity evaluation
the moisture content of the seeds was determined. The physiological conditions of the seeds were
characterized by the standard germination and vigor tests (first count of the standard germination,
seedling vigor classification, acelerated aging, speed of seedling emergence, field emergence and seedling
dry weight). It can be concluded that the comparasion of physiological quality among peanut genotypes
with different seed sizes can be difficult by electrical conductivity.