ArticleMobile genetic elements2012
A retroposon-based view on the temporal differentiation of sex chromosomes.
Article in Mobile genetic elements, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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1 author at 1 institution in 2 countries.
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Abstract
Retroposon presence/absence patterns in orthologous genomic loci are known to be strong and almost homoplasy-free phylogenetic markers of common ancestry. This is evidenced by the comprehensive reconstruction of various species trees of vertebrate lineages in recent years, as well as the inference of the evolution of genes via retroposon-based gene trees of paralogous genes. Recently, it has been shown that retroposon markers are also suitable for the inference of differentiation events of gametologous genes, i.e., homologous genes on opposite sex chromosomes. This is because sex chromosomes evolved via stepwise cessation of recombination, making the presence or absence of a particular retroposon insertion among the two different gametologs in more or less closely related species a clear-cut indicator of the timing of differentiation events. Here, I examine the advantages and current limitations of this novel perspective for understanding avian sex chromosome evolution, compare the retroposon-based and sequence-based insights into gametolog differentiation and show that retroposons promise to be equally applicable to other sex chromosomal systems, such as the human X and Y chromosomes.
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