Abstract
A large genetic variation in pyokori-like jumping behavior was found among the wild flies of the Drosophila nasuta subgroup belonging to the D. immigrans species group. The parallel relationship between phylogenetic divergence and the degree of pyokori-like jumping behavior was demonstrated; that is, the ancestral species, D. pallidifrons, responded more actively than the derived species, e.g., D. kepulauana. Hence this behavior might be used as a marker response for the study of the evolutionary process of Drosophila.
