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Impact of repetitive DNA on sex chromosome evolution in plants

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    0451416 - ÚEB 2016 RIV NL eng J - Článek v odborném periodiku
    Hobza, Roman - Kubát, Z. - Čegan, R. - Jesionek, W. - Vyskot, B. - Kejnovský, E.
    Impact of repetitive DNA on sex chromosome evolution in plants.
    Chromosome Research. Roč. 23, č. 3 (2015), s. 561-570. ISSN 0967-3849. E-ISSN 1573-6849
    Grant CEP: GA ČR GBP501/12/G090; GA ČR GAP501/12/2220
    Institucionální podpora: RVO:61389030
    Klíčová slova: repetitive sequences * transposable elements * tandem repeats (satellites)
    Kód oboru RIV: EB - Genetika a molekulární biologie
    Impakt faktor: 2.590, rok: 2015

    Structurally and functionally diverged sex chromosomes have evolved in many animals as well as in some plants. Sex chromosomes represent a specific genomic region(s) with locally suppressed recombination. As a consequence, repetitive sequences involving transposable elements, tandem repeats (satellites and microsatellites), and organellar DNA accumulate on the Y (W) chromosomes. In this paper, we review the main types of repetitive elements, their gathering on the Y chromosome, and discuss new findings showing that not only accumulation of various repeats in non-recombining regions but also opposite processes form Y chromosome. The aim of this review is also to discuss the mechanisms of repetitive DNA spread involving (retro) transposition, DNA polymerase slippage or unequal crossing-over, as well as modes of repeat removal by ectopic recombination. The intensity of these processes differs in non-recombining region(s) of sex chromosomes when compared to the recombining parts of genome. We also speculate about the relationship between heterochromatinization and the formation of heteromorphic sex chromosomes.
    Trvalý link: http://hdl.handle.net/11104/0252580

     
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