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Evolutionary dynamics of rDNA clusters on chromosomes of moths and butterflies (Lepidoptera)
- 1.0338064 - BC 2010 RIV NL eng J - Journal Article
Nguyen, Petr - Sahara, K. - Yoshido, A. - Marec, František
Evolutionary dynamics of rDNA clusters on chromosomes of moths and butterflies (Lepidoptera).
Genetica. Roč. 138, č. 3 (2010), s. 343-354. ISSN 0016-6707. E-ISSN 1573-6857
R&D Projects: GA ČR GA206/06/1860; GA AV ČR IAA600960925
Grant - others:Student Grant Agency of the Faculty of Science, University of South Bohemia(CZ) SGA2006/01; Japan Society for the Promotion of Science(JP) 18380037; Japan Society for the Promotion of Science(JP) 191114; GA ČR(CZ) 521/08/H042
Institutional research plan: CEZ:AV0Z50070508
Keywords : ribosomal DNA * nucleolar organizer region * chromosome fusion
Subject RIV: EB - Genetics ; Molecular Biology
Impact factor: 2.358, year: 2010
We examined chromosomal distribution of major ribosomal DNAs (rDNAs), clustered in the nucleolar organizer regions (NORs), in 18 species of moths and butterflies using fluorescence in situ hybridization with a codling moth (Cydia pomonella) 18S rDNA probe. Most species showed one or two rDNA clusters in their haploid karyotype but exceptions with 4–11 clusters also occurred. Our results in a compilation with previous data revealed dynamic evolution of rDNA distribution in Lepidoptera except Noctuoidea, which showed a highly uniform rDNA pattern. Based on rDNA dynamics in Lepidoptera and considering the role of ordered nuclear architecture in karyotype evolution, we propose ectopic recombination, i.e., homologous recombination between repetitive sequences of non-homologous chromosomes, as a primary motive force in rDNA repatterning.
Permanent Link: http://hdl.handle.net/11104/0181928
Number of the records: 1