[Chromosomal restructuring of three species of chiromonads from the Chernobyl region (Diptera, Chironomidae)].

Chromosomal polymorphism of three species--Chironomus plumosus, Ch. balatonicus and Glyptotendipes glaucus collected from the Chernobyl Zone demonstrated following characteristics: lack of standard karyotype, the presence of hetero- and homozygotic inversions (seven para- and one pericentric), increase in centromeric heterochromatin (55% larvae in homo- and heterozygotic state), the presence of B chromosomes (21%)--in Ch. plumosus; only two larvae had a standard karyotype, the rest demonstrating hetero- and homozygotic inversions (eleven paracentrics), reciprocal translocations of the IVF and IA arms, B chromosomes (5.4%), increase in telomeric (43.6%) and centromeric (1.8%) heterochromatin--in Ch. balatonicus; two types of hetero- and homozygotic inversions, replacement of standard sequences in C and D for inversional homozygotic ones--in Gl. glaucus.