First Report of<i>Aprostocetus asthenogmus</i>(Hymenoptera: Eulophidae) in South America and Parasitizing Eggs of Triatominae Vectors of Chagas Disease

Santos, Claudiney Biral dos; Tavares, Marcelo Teixeira; Leite, Gustavo Rocha; Ferreira, Adelson Luiz; Rocha, Leonardo de Souza; Falqueto, Aloísio

doi:10.1155/2014/547439

Cited by 1 publication

(1 citation statement)

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“…In our dataset, we have detected a possible HT between the parasitic wasp S. oculata and R. prolixus . Eggs of Triatomine bugs as Rhodnius species are effectively infected by diverse parasitic wasps [ 43 ]. Another example of HT of a mariner element between the parasitic wasp Ascogaster reticulatus and its host the moth Adoxyphyes honmai has also been evidenced [ 44 ].…”

Section: Resultsmentioning

confidence: 99%

Mariner transposons are sailing in the genome of the blood-sucking bug Rhodnius prolixus

et al. 2015

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BackgroundThe Triatomine bug Rhodnius prolixus is a vector of Trypanosoma cruzi, which causes the Chagas disease in Latin America. R. prolixus can also transfer transposable elements horizontally across a wide range of species. We have taken advantage of the availability of the 700 Mbp complete genome sequence of R. prolixus to study the dynamics of invasion and persistence of transposable elements in this species.ResultsUsing both library-based and de novo methods of transposon detection, we found less than 6 % of transposable elements in the R. prolixus genome, a relatively low percentage compared to other insect genomes with a similar genome size. DNA transposons are surprisingly abundant and elements belonging to the mariner family are by far the most preponderant components of the mobile part of this genome with 11,015 mariner transposons that could be clustered in 89 groups (75 % of the mobilome). Our analysis allowed the detection of a new mariner clade in the R. prolixus genome, that we called nosferatis. We demonstrated that a large diversity of mariner elements invaded the genome and expanded successfully over time via three main processes. (i) several families experienced recent and massive expansion, for example an explosive burst of a single mariner family led to the generation of more than 8000 copies. These recent expansion events explain the unusual prevalence of mariner transposons in the R. prolixus genome. Other families expanded via older bursts of transposition demonstrating the long lasting permissibility of mariner transposons in the R. prolixus genome. (ii) Many non-autonomous families generated by internal deletions were also identified. Interestingly, two non autonomous families were generated by atypical recombinations (5' part replacement with 3' part). (iii) at least 10 cases of horizontal transfers were found, supporting the idea that host/vector relationships played a pivotal role in the transmission and subsequent persistence of transposable elements in this genome.ConclusionThese data provide a new insight into the evolution of transposons in the genomes of hematophagous insects and bring additional evidences that lateral exchanges of mobile genetics elements occur frequently in the R. prolixus genome.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-015-2060-9) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 99%