Divergence patterns of banding sequences in different polytene chromosome arms reflect relatively independent evolution of different genome components
- 26 Downloads
Divergence patterns of the banding sequences of the chromosomal arms A, C, D, E, and F were compared in 63 species of the genus Chironomus. Evaluation of the number of breakpoints between the pairs of inverted banding sequences and the analysis of the lengths of the conserved segments in the chromosomal arms in the chironomid species examined showed that different arms evolved relatively independently and at different rates. No direct correlation between the arm length and the breakpoints number was observed. The length of the conservative segment was not fixed, but was arm-specific. Robustness and reliability of the estimates of phylogenetic relationships between the species examined increased with the arm number, i.e., with the genome proportion included in the analysis.
KeywordsPhylogenetic Relationship Divergence Pattern Polytene Chromosome Independent Evolution Genome Component
Unable to display preview. Download preview PDF.
- 2.Zakharov, I.A., Nikiforov, V.S., and Stepanyuk, E.V., Measuring Similarity in the Order of Homologous Genes, Genetika (Moscow), 1991, vol. 27, no.2, pp. 367–369.Google Scholar
- 3.Zakharov, I.A., Nikiforov, V.S., and Stepanyuk, E.V., Homology and Evolution of Gene Orders: Simulation and Reconstruction of the Evolutionary Process, Rus. J. Genet., 1997, vol. 33, no.1, pp. 24–30.Google Scholar
- 9.Kiknadze, I.I., Gunderina, L.I., Istomina, A.G., et al., Similarity Analysis of Inversion Banding Sequences of Chironomus Species (Breakpoint Phylogeny), in Bioinfromatics of Genome Regulation and Structure, Boston, 2003, pp. 245–253.Google Scholar
- 11.Kiknadze, I.I., Golygina, V.V., Istomina, A.G., and Gunderina, L.I., Patterns of Chromosome Polymorphism during Populations and Species Divergence in Chironomus (Diptera, Chironomidae), Sib. Ekol. Zh., 2004, vol. 11, no.5, pp. 635–651.Google Scholar
- 12.Lakin, G.F., Biometriya (Biometrics), Moscow: Vysshaya Shkola, 1980.Google Scholar
- 14.Kumar, S., Tamura, K., Jakobsen, I.B., and Nei, M., MEGA2: Molecular Evolutionary Genetic Analysis Software, Tempe, Arizona: Arizona State Univ., 2001.Google Scholar