Genome Size Variation of Chagas Disease Vectors of the Rhodniini Tribe

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  • 1 Université Paris-Saclay, CNRS, IRD, UMR EGCE, Evolution, Génomes, Comportement et Ecologie, Gif-sur-Yvette, France;
  • | 2 Universidade de São Paulo, Faculdade de Saúde Pública, São Paulo, Brazil;
  • | 3 São Paulo State University, School of Pharmaceutical Sciences, Araraquara, São Paul, Brazil;
  • | 4 University of Campinas–UNICAMP, São Paulo, Brazil;
  • | 5 Université Paris-Saclay, CNRS, AgroParisTech, UMR ESE, Ecologie Systématique et Evolution, Orsay, France
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The genome size of five Rhodnius species (R. milesi, R. nasutus, R. neivai, R. prolixus, and R. robustus) and two Psammolestes species (P. coroedes and P. tertius) were estimated using flow cytometry and/or k-mer distributions in genome sequences. Phylogenetic generalized linear mixed models highlighted significant genome size variations among species and between sexes, with R. prolixus showing the largest genome. In this study we provide the first data on female genome size in Triatominae. For five species, female genome size did not differ from males, except for R. robustus, where females had smaller genomes. Genome size estimations based on the k-mer distribution method were less than those estimated from flow cytometry, but both methods exhibited the same pattern of sexual differences. Further genomic studies are needed to infer whether genome size variation could be an adaptive trait in Rhodnius.

Author Notes

Address correspondence to Myriam Harry, Université Paris-Saclay, CNRS, IRD, UMR EGCE, Evolution, Génomes, Comportement et Ecologie, Gif-sur-Yvette, France. E-mail: myriam.harry@egce.cnrs-gif.fr

These authors contributed equally to this work.

Financial support: J. A. R. received support from CNPq, PQ-2, process 307 398/2018-8. MTA No 007/2018. FAPESP Project number 2017/50329-0. Fundação de Apoio à Pesquisa do Estado da Paraíba - FAPESQ Process 47896.673.31653.11082021. SPRINT project UNICAMP, CNRS.

Authors’ addresses: Marie Merle, Jonathan Filée, Florence Mougel, Héloïse Bastide, and Myriam Harry, Université Paris-Saclay, CNRS, IRD, UMR EGCE, Evolution, Génomes, Comportement et Ecologie, Gif-sur-Yvette, France, E-mails: marie.merle@universite-paris-saclay.fr, jonathan.filee@egce.cnrs-gif.fr, florence.mougel-imbert@egce.cnrs-gif.fr, heloise.bastide@egce.cnrs-gif.fr, and myriam.harry@egce.cnrs-gif.fr. Jader de Oliveira, Universidade de São Paulo, Faculdade de Saúde Pública, São Paulo, Brazil, and São Paulo State University, School of Pharmaceutical Sciences, Araraquara, São Paul, Brazil, E-mail: jdr.oliveira@hotmail.com. Carlos Eduardo Almeida, University of Campinas–UNICAMP, São Paulo, Brazil, current address: Universidade Federal da Bahia–Salvador, Campus Ondina, E-mail: almeida_ce@hotmail.com. João Aristeu da Rosa, São Paulo State University, School of Pharmaceutical Sciences, Araraquara, São Paul, Brazil, E-mail: joaoaristeu@gmail.com. Marc Girondot, Université Paris-Saclay, CNRS, AgroParisTech, UMR ESE, Ecologie Systématique et Evolution, Orsay, France, E-mail: marc.girondot@universite-paris-saclay.fr.

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