“…It was possible to classify the F 2:3 progenies and genitors into two groups, separating them into phenotypic classes of resistance and susceptibility. The rst was formed by the Yoshimatsu and Hawaii 7996 genotypes, which showed greater resistance, but did not differ signi cantly from the following 19 progenies: 2, 5, 7, 8,11,12,13,17,20,21,23, 33, 40, 45, 47, 50, 52, 55, 57. The second group, susceptible, was made up of 41 progenies that showed no signi cant differences between each other.…”