role of repetitive DNA in structure and evolution of sex chromosomes in plants

Eukaryotic genomes contain a large proportion of repetitive DNA sequences, mostly transposable elements (TEs) and tandem repeats. These repetitive sequences often colonize specific chromosomal (Y or W chromosomes, B chromosomes) or subchromosomal (telomeres, centromeres) niches. Sex chromosomes, esp...

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Bibliographic Details
Published inHeredity Vol. 102; no. 6; pp. 533 - 541
Main Authors Kejnovsky, E, Hobza, R, Cermak, T, Kubat, Z, Vyskot, B
Format Journal Article
LanguageEnglish
Published England Springer Nature B.V 01.06.2009
Subjects
Botany
Chromosomes
Chromosomes, Plant - genetics
Deoxyribonucleic acid
dioecy
DNA
evolution
Evolution, Molecular
Gender
genetic recombination
Genomics
literature reviews
Niches
plants
Plants - genetics
repetitive sequences
Repetitive Sequences, Nucleic Acid
sex chromosomes
Sex Chromosomes - genetics
transposition (genetics)
transposons
Y chromosome
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Summary:Eukaryotic genomes contain a large proportion of repetitive DNA sequences, mostly transposable elements (TEs) and tandem repeats. These repetitive sequences often colonize specific chromosomal (Y or W chromosomes, B chromosomes) or subchromosomal (telomeres, centromeres) niches. Sex chromosomes, especially non-recombining regions of the Y chromosome, are subject to different evolutionary forces compared with autosomes. In non-recombining regions of the Y chromosome repetitive DNA sequences are accumulated, representing a dominant and early process forming the Y chromosome, probably before genes start to degenerate. Here we review the occurrence and role of repetitive DNA in Y chromosome evolution in various species with a focus on dioecious plants. We also discuss the potential link between recombination and transposition in shaping genomes.
Bibliography:http://dx.doi.org/10.1038/hdy.2009.17
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ISSN:0018-067X
1365-2540
DOI:10.1038/hdy.2009.17