Evolutionary dynamics of rDNA clusters on chromosomes of moths and butterflies (Lepidoptera)

0338064 - BC 2010 RIV NL eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA206/06/1860; GA AV ČR IAA600960925
Grant ostatní: 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
Výzkumný záměr: CEZ:AV0Z50070508
Klíčová slova: ribosomal DNA * nucleolar organizer region * chromosome fusion
Kód oboru RIV: EB - Genetika a molekulární biologie
Impakt faktor: 2.358, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0181928