The geographic varieties of silkworm share a large genomic component and this degree of similarity makes it necessary to study and evaluate a higher number of characteristics in each line to determine if they should be maintained and replicated as a stock for improvement, in spite of their high degre of similarity. It would also be important to further evaluate lines such as SG3, K20 and K30 in the Japanese group and, above all, the SC1 Chinese line, which showed AFLP patterns that locate them distantly in their cluster.