Počet záznamů: 1

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

  1. 1.
    0338064 - BC-A 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
    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