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Impact of repetitive DNA on sex chromosome evolution in plants
R. Hobza, Z. Kubat, R. Cegan, W. Jesionek, B. Vyskot, E. Kejnovsky,
Jazyk angličtina Země Nizozemsko
Typ dokumentu časopisecké články, práce podpořená grantem
NLK
ProQuest Central
od 1997-02-01 do Před 1 rokem
Medline Complete (EBSCOhost)
od 2010-01-01 do Před 1 rokem
Health & Medicine (ProQuest)
od 1997-02-01 do Před 1 rokem
- MeSH
- chromozomy rostlin * MeSH
- DNA rostlinná * MeSH
- molekulární evoluce * MeSH
- pohlavní chromozomy genetika MeSH
- regulace genové exprese u rostlin MeSH
- repetitivní sekvence nukleových kyselin * MeSH
- rostliny genetika MeSH
- transpozibilní elementy DNA MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
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.
Citace poskytuje Crossref.org
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- $a Hobza, Roman $u Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic. hobza@ibp.cz. Institute of Experimental Botany AS CR, Centre of the Region Hana for Biotechnological and Agricultural Research, Olomouc-Holice, Czech Republic. hobza@ibp.cz.
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- $a 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.
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- $a Kubat, Zdenek $u Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
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- $a Kejnovsky, Eduard $u Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic. kejnovsk@ibp.cz.
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