Disparate molecular evolution of two types of repetitive DNAs in the genome of the grasshopper Eyprepocnemis plorans

Heredity
M TeruelF Perfectti

Abstract

Wide arrays of repetitive DNA sequences form an important part of eukaryotic genomes. These repeats appear to evolve as coherent families, where repeats within a family are more similar to each other than to other orthologous representatives in related species. The continuous homogenization of repeats, through selective and non-selective processes, is termed concerted evolution. Ascertaining the level of variation between repeats is crucial to determining which evolutionary model best explains the homogenization observed for these sequences. Here, for the grasshopper Eyprepocnemis plorans, we present the analysis of intragenomic diversity for two repetitive DNA sequences (a satellite DNA (satDNA) and the 45S rDNA) resulting from the independent microdissection of several chromosomes. Our results show different homogenization patterns for these two kinds of paralogous DNA sequences, with a high between-chromosome structure for rDNA but no structure at all for the satDNA. This difference is puzzling, considering the adjacent localization of the two repetitive DNAs on paracentromeric regions in most chromosomes. The disparate homogenization patterns detected for these two repetitive DNA sequences suggest that several processes par...Continue Reading

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Citations

Jul 6, 2014·Molecular Genetics and Genomics : MGG·Mercedes Ruiz-EstévezJuan Pedro M Camacho
Oct 16, 2014·BMC Genetics·Stenio VittorazziShirlei Recco-Pimentel
Jan 22, 2015·Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology·Eugenia E MontielJuan Pedro M Camacho
Sep 17, 2014·PloS One·José Carlos Pansonato-AlvesFausto Foresti
Aug 31, 2017·BMC Genetics·Diogo MilaniDiogo Cavalcanti Cabral-de-Mello

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