Počet záznamů: 1  

Comparative Chromosomal Mapping of Microsatellites in Leporinus Species (Characiformes, Anostomidae): Unequal Accumulation on the W Chromosomes

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    0436836 - BFÚ 2015 RIV CH eng J - Článek v odborném periodiku
    Poltronieri, J. - Marquioni, V. - Bertollo, L.A.C. - Kejnovský, Eduard - Molina, W.F. - Liehr, T. - Cioffi, M.B.
    Comparative Chromosomal Mapping of Microsatellites in Leporinus Species (Characiformes, Anostomidae): Unequal Accumulation on the W Chromosomes.
    Cytogenetic and Genome Research. Roč. 142, č. 1 (2014), s. 40-45. ISSN 1424-8581. E-ISSN 1424-859X
    Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068
    Institucionální podpora: RVO:68081707
    Klíčová slova: FISH * Heterochromatin * Molecular cytogenetics
    Kód oboru RIV: BO - Biofyzika
    Impakt faktor: 1.561, rok: 2014

    Approximately 90 species in the genus Leporinus (Characiformes, Anostomidae) are known, and most of them do not present differentiated sex chromosomes. However, there is a group of 7 species that share a heteromorphic ZW sex system. In all of these species, the W chromosome is the largest one in the karyotype and is mostly heterochromatic. We investigated the distribution of several microsatellites in the genome of 4 Leporinus species that possess ZW chromosomes. Our results showed a very large accumulation of mostly microsatellites on the W chromosomes. This finding supports the presence of an interconnection between heterochromatinization and the accumulation of repetitive sequences, which has been proposed for sex chromosome evolution, and suggests that heterochromatinization is the earlier of the 2 processes. In spite of the common origin that has been proposed for W chromosomes in all of the studied species, the microsatellites followed different evolutionary trajectories in each species, which indicates a high plasticity for sex chromosome differentiation. (C) 2013 S. Karger AG, Basel
    Trvalý link: http://hdl.handle.net/11104/0240512

     
     
Počet záznamů: 1  

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