Speciation and chromosomal evolution of the palaearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae): Chromosome polymorphism in the populations of S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, and S. electa Proviz et al., 1999 from the Irkutsk reservoir

Speciation and chromosomal evolution of the palaearctic species of chironomids of the genus... Chromosome polymorphism was studied in populations of three Palaearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae) from the Irkutsk reservoir: S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, and S. electa Proviz et al., 1999. It was found that in S. baueri heterozygous individuals constitute 72% of the population with 0.8 of inversion per individual. In total, three inversion sequences were detected. The most widespread was the inversion in regions 7–12 of the arm IIIR with the borders similar to those of the inversion in the Far East S. baueri populations and in populations of other species of the genus. In S. prima, heterozygotes constituted 60%, with the number of inversions per individual was 1.3. Seven inversion sequences were revealed, of which three were found in chromosome IV. In the S. electa population, only one inversion sequence was observed in chromosome III in 36% of larvae (0.4 of inversion per individual). The level of chromosome polymorphism in the populations of the Palaearctic species is comparable with that in the populations of endemic Sergentia from the Baikal Lake. Ten rearrangements were revealed in each of the two groups, but similar borders of chromosome regions were established only for two inversions. In the studied Sergentia species, chromosome IV has the most variable structure. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Speciation and chromosomal evolution of the palaearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae): Chromosome polymorphism in the populations of S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, and S. electa Proviz et al., 1999 from the Irkutsk reservoir

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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/S1022795409120096
Publisher site
See Article on Publisher Site

Abstract

Chromosome polymorphism was studied in populations of three Palaearctic species of chironomids of the genus Sergentia Kieffer (Diptera, Chironomidae) from the Irkutsk reservoir: S. baueri Wülker et al., 1999, S. prima Proviz et al., 1997, and S. electa Proviz et al., 1999. It was found that in S. baueri heterozygous individuals constitute 72% of the population with 0.8 of inversion per individual. In total, three inversion sequences were detected. The most widespread was the inversion in regions 7–12 of the arm IIIR with the borders similar to those of the inversion in the Far East S. baueri populations and in populations of other species of the genus. In S. prima, heterozygotes constituted 60%, with the number of inversions per individual was 1.3. Seven inversion sequences were revealed, of which three were found in chromosome IV. In the S. electa population, only one inversion sequence was observed in chromosome III in 36% of larvae (0.4 of inversion per individual). The level of chromosome polymorphism in the populations of the Palaearctic species is comparable with that in the populations of endemic Sergentia from the Baikal Lake. Ten rearrangements were revealed in each of the two groups, but similar borders of chromosome regions were established only for two inversions. In the studied Sergentia species, chromosome IV has the most variable structure.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Dec 12, 2009

References

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