High intrachromosomal similarity of retrotransposon long terminal repeats: evidence for homogenization by gene conversion on plant sex chromosomes?
Language English Country Netherlands Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
17134852
DOI
10.1016/j.gene.2006.10.007
PII: S0378-1119(06)00633-0
Knihovny.cz E-resources
- MeSH
- Chromosomes, Plant genetics MeSH
- DNA Primers genetics MeSH
- DNA, Plant genetics MeSH
- Phylogeny MeSH
- Gene Conversion MeSH
- In Situ Hybridization, Fluorescence MeSH
- Terminal Repeat Sequences * MeSH
- Models, Genetic MeSH
- Evolution, Molecular MeSH
- Retroelements * MeSH
- Base Sequence MeSH
- Silene genetics MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- DNA Primers MeSH
- DNA, Plant MeSH
- Retroelements * MeSH
Retrotransposons are ubiquitous in the plant genomes and are responsible for their plasticity. Recently, we described a novel family of gypsy-like retrotransposons, named Retand, in the dioecious plant Silene latifolia possessing evolutionary young sex chromosomes of the mammalian type (XY). Here we have analyzed long terminal repeats (LTRs) of Retand that were amplified from laser microdissected X and Y sex chromosomes and autosomes of S. latifolia. A majority of X and Y-derived LTRs formed a few separate clades in phylogenetic analysis reflecting their high intrachromosomal similarity. Moreover, the LTRs localized on the Y chromosome were less divergent than the X chromosome-derived or autosomal LTRs. These data can be explained by a homogenization process, such as gene conversion, working more intensively on the Y chromosome.
References provided by Crossref.org
Horizontal transfer - imperative mission of acellular life forms, Acytota
Impact of repetitive DNA on sex chromosome evolution in plants
