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Chromosome analysis of different lineages of Triatoma sordida of Brazil, with emphasis on the phenomenon of cryptic speciation

Grant number: 14/07706-9
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2014
Effective date (End): May 31, 2015
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal Investigator:Maria Tercília Vilela de Azeredo Oliveira
Grantee:Yago Visinho dos Reis
Host Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil


Triatoma sordida is an important vector species in Brazil, because it presents great geographic distribution, and has been captured in thirteen Brazilian states and has been found infected with Trypanosoma cruzi in regions peridomicile and intradomicile.Populations of T. sordida in Bolivia were analyzed by isozymes and the phenomenon of cryptic speciation was described because it was possible to divide two groups of T. sordida with genetic distance that supports distinct species. Specimens from Brazil and Argentina were analyzed cytogenetically and large differences could be observed, as the absence of heterochromatic blocks autosomes in insects from Argentina and presence of constitutive heterochromatin in eight to ten pairs of autosomes the copies of Brazil.Recently, the chromosomes of mutants of T. sordida were analyzed with morphological changes and chromosomal abnormalities during meiosis were also observed. These characteristics led the authors to propose that the phenomenon of cryptic speciation may also be occurring in Brazil. Thus, the present study aims to analyze the cytogenetic characteristics of T. sordida from four different Brazilian states (Bahia, São Paulo, Goiás and Minas Gerais), with emphasis on the phenomenon of cryptic speciation.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MADEIRA, FERNANDA FERNANDEZ; DOS REIS, YAGO VISINHO; BITTINELLI, ISADORA DE FREITAS; GRZYB DELGADO, LUIZA MARIA; DE OLIVEIRA, JADER; MENDONCA, VAGNER JOSE; FIGUEIREDO MOREIRA, FELIPE FERRAZ; VILELA DE AZEREDO-OLIVEIRA, MARIA TERCILIA; DA ROSA, JOAO ARISTEU; CHABOLI ALEVI, KAIO CESAR. Genetic Structure of Brazilian Populations of Triatoma sordida (Stal, 1859) (Hemiptera, Triatominae) by Means of Chromosomal Markers. American Journal of Tropical Medicine and Hygiene, v. 100, n. 4, p. 907-910, . (17/05015-7, 18/12039-2, 14/07706-9, 13/19764-0)

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