title: [Karyotype structure in species of Propsilocerus genus (Diptera, Chironomidae)].
abstract: Karyotype structure and polytene chromosome banding patterns were studied in two Orthocladiinae siblings--Propsilocerus akamusi (China) and Propsilocerus jacuticus (Russia). Both species have haploid number of chromosome typical for Orthocladiinae (n = 3). An unusual structure of centromeric regions was observed in all three chromosomes of karyotypes in both species. Photomaps of polytene chromosomes are presented. A comparison of karyotypes of P. akamusi and Propsilocerus jacuticus revealed a high level of homology in their banding sequences, however, the presence of fixed paracentric inversions in chromosomal arms IR, IIR, IIIR of Propsilocerus jacuticus has shown a clear-cut phylogenetic divergence. No chromosomal polymorphism was found in both species.
authors.forename: I I
authors.initials: II
authors.lastname: Kiknadze
authors.forename: A G
authors.initials: AG
authors.lastname: Istomina A G
authors.forename: Hinhua
authors.initials: H
authors.lastname: Wang
authors.forename: V V
authors.initials: VV
authors.lastname: Golygina
mesh_terms: D000818:Animals; D002503:Centromere / Q000235:genetics; D002681:China; D002875:Chromosomes / Q000145:classification / Q000235:genetics*; D004175:Diptera / Q000235:genetics*; D007621:Karyotyping; D012426:Russia; D013045:Species Specificity