EVOLUTIONARY GENETICS OF THE DROSOPHILA-MONTIUM SUBGROUP .2. MITOCHONDRIAL-DNA VARIATION

Mitochondrial DNA (mtDNA) variation was investigated among 18 species in the Drosophila montium species subgroup. Based on the restriction p atterns of 14 restriction enzymes, the subgroup was clearly classified into 3 species complexes, the kikkawai complex (6 species), the jambu lina complex (4 species) and the auraria complex (8 species), which we re previously proposed by cross experiments. The relationship between the kikkawai and the jambulina complex were proved to show much closer than that between the auraria and the two complexes by the proportion of restriction fragments which were shared among complexes. The phylo geny among members within the complexes constructed using mtDNA variat ion was not always consistent with other available information concern ing about protein divergence and reproductive isolation.