Speciation and chromosomal evolution of the Palearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae): Divergence of the Karyotypes of S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, S. electa Proviz et al., 1999 and their relationship with the endemic species from Baikal lake

Speciation and chromosomal evolution of the Palearctic species of chironomids of the genus... The banding structures of chromosomes of three Palearctic species of chironomids of the genus Sergentia Kieffer, 1922 from the Irkutsk reservoir were comparatively analyzed: S. baueri Wülker et al., 1999 (2n = 8), S. prima Proviz et al., 1997 (2n = 8), and S. electa Proviz et al., 1999 (2n = 6). The S. baueri karyotype was taken as a standard in chromosome mapping. It was established that in contrast to S. baueri and S. prima the S. electa karyotype was formed due to a complex translocation: transfer of chromosome IV in the median part of chromosome III. The sequences of chromosome I bands were found to be completely homologous in all Palearctic species and in S. rara Proviz et al., 1999 (2n = 8) taken as the original species in the group of Baikalian endemics. In both groups, seven homozygous inversions were detected, of which the common one is the inversion in chromosome III. It was assumed on the basis of the results of the karyological analysis that among the Palearctic species S. baueri is most similar to the Baikalian endemics and S. electa is phylogenetically closer to S. prima. Specific features of the chromosome and morphological evolutions of the Sergentia genus species are considered. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Speciation and chromosomal evolution of the Palearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae): Divergence of the Karyotypes of S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, S. electa Proviz et al., 1999 and their relationship with the endemic species from Baikal lake

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Publisher
Springer Journals
Copyright
Copyright © 2009 by Pleiades Publishing, Ltd.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795409100111
Publisher site
See Article on Publisher Site

Abstract

The banding structures of chromosomes of three Palearctic species of chironomids of the genus Sergentia Kieffer, 1922 from the Irkutsk reservoir were comparatively analyzed: S. baueri Wülker et al., 1999 (2n = 8), S. prima Proviz et al., 1997 (2n = 8), and S. electa Proviz et al., 1999 (2n = 6). The S. baueri karyotype was taken as a standard in chromosome mapping. It was established that in contrast to S. baueri and S. prima the S. electa karyotype was formed due to a complex translocation: transfer of chromosome IV in the median part of chromosome III. The sequences of chromosome I bands were found to be completely homologous in all Palearctic species and in S. rara Proviz et al., 1999 (2n = 8) taken as the original species in the group of Baikalian endemics. In both groups, seven homozygous inversions were detected, of which the common one is the inversion in chromosome III. It was assumed on the basis of the results of the karyological analysis that among the Palearctic species S. baueri is most similar to the Baikalian endemics and S. electa is phylogenetically closer to S. prima. Specific features of the chromosome and morphological evolutions of the Sergentia genus species are considered.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Oct 11, 2009

References

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