KARYOTYPE STRUCTURE IN SPECIES OF PROPSILOCERUS GENUS (DIPTERA,
CHIRONOMIDAE)
I. I. Kiknadze,1 A. G. Istomina,1 Hinhuu Wang, 2
V. V. Golygina 1
1 Institute of Cytology and Genetics, Siberian Branch of RAS, Russia,
and 2 College of Life Sciences, Nankai University, Tianjin, China;
e-mail: aist@bionet.nsc.ru
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 amis IR, IIR, IIIR of Propsilocerus jacuticus has shown a clear-cut phylogenetic divergence.
No chromosomal polymorphism was found in both species.
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