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- Retrotransposon_marker abstract "Retrotransposon markers are retrotransposons that are used as cladistic markers.The analysis of SINEs – Short INterspersed Elements – LINEs – Long INterspersed Elements – or truncated LTRs – Long Terminal Repeats – as molecular cladistic markers represents a particularly interesting complement to DNA sequence and morphological data. The reason for this is that retrotransposons are assumed to represent powerful noise-poor synapomorphies. The target sites are relatively unspecific so that the chance of an independent integration of exactly the same element into one specific site in different taxa is not large and may even be negligible over evolutionary time scales. Retrotransposon integrations are currently assumed to be irreversible events; this might change since no eminent biological mechanisms have yet been described for the precise re-excision of class I transposons, but see van de Lagemaat et al. (2005). A clear differentiation between ancestral and derived character state at the respective locus thus becomes possible as the absence of the introduced sequence can be with high confidence considered ancestral.In combination, the low incidence of homoplasy together with a clear character polarity make retrotransposon integration markers ideal tools for determining the common ancestry of taxa by a shared derived transpositional event. The “presence” of a given retrotransposon in related taxa suggests their orthologous integration, a derived condition acquired via a common ancestry, while the “absence” of particular elements indicates the plesiomorphic condition prior to integration in more distant taxa. The use of presence/absence analyses to reconstruct the systematic biology of mammals depends on the availability of retrotransposons that were actively integrating before the divergence of a particular species.Examples for phylogenetic studies based on retrotransposon presence/absence data are the definition of whales as members of the order Cetartiodactyla with hippos being their closest living relatives, hominoid relationships, the strepsirrhine tree, the marsupial radiation from South America to Australia, and the placental mammalian evolution.Inter-Retrotransposons Amplified Polymorphisms (IRAPs) are an alternative valuable retrotransposon-based markers. In this method, PCR oligonucleotide primers facing outwards from the LTR or other regions of retrotransposons are made and amplify between two retroelements inserted into the genome. As discussed above, the insertion of elements into the genome mean that the number of sites amplified and sizes of inter-retroelement fragments differ between different lines, and can be used as markers to detect genotypes, measure diversity or reconstruct phylogeny.".
- Retrotransposon_marker wikiPageID "4580826".
- Retrotransposon_marker wikiPageLength "7699".
- Retrotransposon_marker wikiPageOutDegree "40".
- Retrotransposon_marker wikiPageRevisionID "679034536".
- Retrotransposon_marker wikiPageWikiLink Ancestor.
- Retrotransposon_marker wikiPageWikiLink Ancestral.
- Retrotransposon_marker wikiPageWikiLink Ancestry.
- Retrotransposon_marker wikiPageWikiLink Ape.
- Retrotransposon_marker wikiPageWikiLink Biological_process.
- Retrotransposon_marker wikiPageWikiLink Category:Phylogenetics.
- Retrotransposon_marker wikiPageWikiLink Cetartiodactyla.
- Retrotransposon_marker wikiPageWikiLink Cladistics.
- Retrotransposon_marker wikiPageWikiLink Convergent_evolution.
- Retrotransposon_marker wikiPageWikiLink DNA_sequence.
- Retrotransposon_marker wikiPageWikiLink Even-toed_ungulate.
- Retrotransposon_marker wikiPageWikiLink Evolution.
- Retrotransposon_marker wikiPageWikiLink Evolutionary.
- Retrotransposon_marker wikiPageWikiLink Hominoid.
- Retrotransposon_marker wikiPageWikiLink Homology_(biology).
- Retrotransposon_marker wikiPageWikiLink Homoplasy.
- Retrotransposon_marker wikiPageWikiLink Locus_(genetics).
- Retrotransposon_marker wikiPageWikiLink Mammal.
- Retrotransposon_marker wikiPageWikiLink Mammalian.
- Retrotransposon_marker wikiPageWikiLink Marsupial.
- Retrotransposon_marker wikiPageWikiLink Morphology_(biology).
- Retrotransposon_marker wikiPageWikiLink Nucleic_acid_sequence.
- Retrotransposon_marker wikiPageWikiLink PCR.
- Retrotransposon_marker wikiPageWikiLink Phylogenetic.
- Retrotransposon_marker wikiPageWikiLink Phylogenetics.
- Retrotransposon_marker wikiPageWikiLink Placental.
- Retrotransposon_marker wikiPageWikiLink Placentalia.
- Retrotransposon_marker wikiPageWikiLink Plesiomorphic.
- Retrotransposon_marker wikiPageWikiLink Polymerase_chain_reaction.
- Retrotransposon_marker wikiPageWikiLink Retrotransposon.
- Retrotransposon_marker wikiPageWikiLink Species.
- Retrotransposon_marker wikiPageWikiLink Strepsirrhine.
- Retrotransposon_marker wikiPageWikiLink Strepsirrhini.
- Retrotransposon_marker wikiPageWikiLink Synapomorphies.
- Retrotransposon_marker wikiPageWikiLink Synapomorphy.
- Retrotransposon_marker wikiPageWikiLink Taxa.
- Retrotransposon_marker wikiPageWikiLink Taxon.
- Retrotransposon_marker wikiPageWikiLink Transposable_element.
- Retrotransposon_marker wikiPageWikiLink Transposon.
- Retrotransposon_marker wikiPageWikiLink Whale.
- Retrotransposon_marker wikiPageWikiLink Whales.
- Retrotransposon_marker wikiPageWikiLinkText "Retrotransposon marker".
- Retrotransposon_marker wikiPageWikiLinkText "markers".
- Retrotransposon_marker wikiPageWikiLinkText "presence/absence data".
- Retrotransposon_marker wikiPageWikiLinkText "retrotransposon insertion sites".
- Retrotransposon_marker wikiPageWikiLinkText "retrotransposon marker".
- Retrotransposon_marker hasPhotoCollection Retrotransposon_marker.
- Retrotransposon_marker wikiPageUsesTemplate Template:Context.
- Retrotransposon_marker wikiPageUsesTemplate Template:Reflist.
- Retrotransposon_marker subject Category:Phylogenetics.
- Retrotransposon_marker hypernym Retrotransposons.
- Retrotransposon_marker type Article.
- Retrotransposon_marker type Article.
- Retrotransposon_marker type Page.
- Retrotransposon_marker type Subfield.
- Retrotransposon_marker comment "Retrotransposon markers are retrotransposons that are used as cladistic markers.The analysis of SINEs – Short INterspersed Elements – LINEs – Long INterspersed Elements – or truncated LTRs – Long Terminal Repeats – as molecular cladistic markers represents a particularly interesting complement to DNA sequence and morphological data. The reason for this is that retrotransposons are assumed to represent powerful noise-poor synapomorphies.".
- Retrotransposon_marker label "Retrotransposon marker".
- Retrotransposon_marker sameAs m.0c9y85.
- Retrotransposon_marker sameAs Q7317085.
- Retrotransposon_marker sameAs Q7317085.
- Retrotransposon_marker wasDerivedFrom Retrotransposon_marker?oldid=679034536.
- Retrotransposon_marker isPrimaryTopicOf Retrotransposon_marker.