Fisrt data on karyotype and chromosomal polymorphism of Chironomus melanescens Keyl, 1961 (Diptera, Chironomidae) of Eastern Caucasus (Republic of Dagestan)

The first data on karyotype and chromosomal polymorphism of Chironomus melanescens Keyl, 1961 (Diptera, Chironomidae) of the Eastern Caucasus (Republic of Dagestan) are presented. It was found that the population of Ch. melanescens of the Eastern Caucasus is characterized by a relatively low level of inversion polymorphism. On the spectrum and frequencies of genotype combinations of banding sequences the population of the Eastern Caucasus is the closest to Central Caucasus. Genetic distances between the studied populations indicate a significant isolation of Caucasian populations from previously studied ones.