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HOMOLOGY-FREE DETECTION OF TRANSPOSABLE ELEMENTS UNVEILS THEIR DYNAMICS IN THREE ECOLOGICALLY DISTINCT RHODNIUS SPECIES
Repeatome
Explosão de transposição
Rhodnius montenegrensis
Rhodnius marabensis
Repeatome
Burst of transposition
dnaPipeTE
Rhodnius prolixus
Rhodnius montenegrensis
Rhodnius marabaensis
Autor
Afiliación
Universidade Estadual Paulista. Departamento de Biologia. São José do Rio Preto, SP, Brasil.
Cornell University, 107 Biotechnology Building. Department of Molecular Biology and Genetics. Ithaca, NY, USA.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Epidemiologia e Sistemática Molecular. Rio de Janeiro, RJ, Brasil.
Université de Lyon. Laboratoire de Biometrié et Biologie Evolutive. Lyon, France.
Universidade Estadual Paulista. Departamento de Biologia. São José do Rio Preto, SP, Brasil.
Cornell University, 107 Biotechnology Building. Department of Molecular Biology and Genetics. Ithaca, NY, USA.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Epidemiologia e Sistemática Molecular. Rio de Janeiro, RJ, Brasil.
Université de Lyon. Laboratoire de Biometrié et Biologie Evolutive. Lyon, France.
Universidade Estadual Paulista. Departamento de Biologia. São José do Rio Preto, SP, Brasil.
Resumen en ingles
Transposable elements (TEs) are widely distributed repetitive sequences in the genomes across the tree of life, and represent an important source of genetic variability. Their distribution among genomes is specific to each lineage. A phenomenon associated with this feature is the sudden expansion of one or several TE families, called bursts of transposition. We previously proposed that bursts of the Mariner family (DNA transposons) contributed to the speciation of Rhodnius prolixus Stål, 1859. This hypothesis motivated us to study two additional species of the R. prolixus complex: Rhodnius montenegrensis da Rosa et al., 2012 and Rhodnius marabaensis Souza et al., 2016, together with a new, de novo annotation of the R. prolixus repeatome using unassembled short reads. Our analysis reveals that the total amount of TEs present in Rhodnius genomes (19% to 23.5%) is three to four times higher than that expected based on the original quantifications performed for the original genome description of R. prolixus. We confirm here that the repeatome of the three species is dominated by Class II elements of the superfamily Tc1-Mariner, as well as members of the LINE order (Class I). In addition to R. prolixus, we also identified a recent burst of transposition of the Mariner family in R. montenegrensis and R. marabaensis, suggesting that this phenomenon may not be exclusive to R. prolixus. Rather, we hypothesize that whilst the expansion of Mariner elements may have contributed to the diversification of the R. prolixus-R. robustus species complex, the distinct ecological characteristics of these new species did not drive the general evolutionary trajectories of these TEs.
Palabras clave en portugues
Famíia marinhaRepeatome
Explosão de transposição
Rhodnius montenegrensis
Rhodnius marabensis
Palabras clave en ingles
Mariner familyRepeatome
Burst of transposition
dnaPipeTE
Rhodnius prolixus
Rhodnius montenegrensis
Rhodnius marabaensis
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