[Karyotype structure in species of Propsilocerus genus (Diptera, Chironomidae)].
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.
Kiknadze
I I
II
Istomina A G
A G
AG
Wang
Hinhua
H
Golygina
V V
VV
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