Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/18613
Title: Karyosystematics of Triatoma rubrofasciata (De Geer, 1773) (Hemiptera: Reduviidae: Triatominae)
Authors: Alevi, Kaio Cesar Chaboli
Borsatto, Kelly Cristine
Moreira, F. F. F.
Jurberg, José
Oliveira, Maria Tercília Vilela de Azeredo
Affilliation: Universidade Estadual Paulista "Julio de Mesquita Filho"'. Instituto de Biociencias, Letras e Ciencias Exatas. Departamento de Biologia. Laboratório de Biologia Celular. São José do Rio Preto, SP, Brasil.
Universidade Estadual Paulista "Julio de Mesquita Filho"'. Instituto de Biociencias, Letras e Ciencias Exatas. Departamento de Biologia. Laboratório de Biologia Celular. São José do Rio Preto, SP, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório Nacional e Internacional de Referencia em Taxonomia de Triatomineos . Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório Nacional e Internacional de Referencia em Taxonomia de Triatomineos . Rio de Janeiro, RJ, Brasil.
Universidade Estadual Paulista "Julio de Mesquita Filho"'. Instituto de Biociencias, Letras e Ciencias Exatas. Departamento de Biologia. Laboratório de Biologia Celular. São José do Rio Preto, SP, Brasil.
Abstract: Triatoma rubrofasciata (De Geer) is the first species of triatomine described, and little is known on its vector biology. Studies are restricted to starvation resistance, interspecific morphometric variability, morphometry of testis follicles, coloration of the testicular peritoneal sheath, ultrastructure of the male accessory glands, phylogeny and cytogenetics. Thus, this study aims to address the karyosystematics of T. rubrofasciata and the possible events related to karyotype evolution of this species. Four adult males were analyzed cytogenetically. The analysis of meiotic metaphases of T. rubrofasciata allowed to confirm the karyotype of species, out more, 2n = 25 (22A + X1X2Y). This number is very important for taxonomic and evolutionary inferences on the species, because of the 88 triatomine species with described karyotype, only T. rubrofasciata exhibits 25 chromosomes. Based on the hypothesis of the karyotype 2n = 22 (20A + XY) as ancestral for triatomines, we propose three evolutionary hypotheses for the emergence of the karyotype of T rubrofasciata, all supported by agmatoploidy events (fission). Basically the hypotheses are 1) fission for a pair of autosomes, resulting in 22 autosomes and later fission of sex chromosome X; 2) fission of pair of autosomes and the sex chromosome X concomitantly; 3) fission of sex chromosome X and subsequently fission of pair of autosomes. Thus, this study highlights for the first time the importance of the number of chromosomes of T. rubrofasciata as characteristic diagnosis in Triatominae subfamily and describes three evolutionary hypotheses that possibly led the emergence of karyotype of this insect of global importance.
Keywords: karyotype
citotaxonomy
taxonomy
agmatoploidy
keywords: Taxonomia
Citotaxonomia
Cariótipo
Agmatoploidia
DeCS: Cariótipo 
Issue Date: 2015
Publisher: Magnolia Press
Citation: ALEVI, Kaio Cesar Chaboli; et al. Karyosystematics of Triatoma rubrofasciata (De Geer, 1773) (Hemiptera: Reduviidae: Triatominae). Zootaxa, 3994, n.3, p.433-438, 2015.
DOI: 10.11646/zootaxa.3994.3.7
ISSN: 1175-5326
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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