Revisiting the Chromosomal Diversification of the Genus Rhodnius (St al, 1859) (Hemiptera, Triatominae)

Autor(es)

Ravazi, Amanda ^[1] ; Olaia, Nicoly ^[2] ; de Oliveira, Jader ^[2] ; Souza, Eder dos Santos ^[2] ; da Rosa, Joao Aristeu ^[2] ; Vilela De Azeredo-Oliveira, Maria Tercilia ^[3] ; Chaboli Alevi, Kaio Cesar ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista Julio de Mesquita Filho IB, Inst Biociencias, Botucatu, SP - Brazil

^[2] Univ Estadual Paulista Julio de Mesquita Filho FC, Fac Ciencias Farmaceut, Dept Ciencias Biol, Lab Parasitol, Araraquara, SP - Brazil

^[3] Univ Estadual Paulista Julio de Mesquita Filho IB, Inst Biociencias Letras & Ciencias Exatas, Dept Biol, Lab Biol Celular, Sao Jose Do Rio Preto - Brazil

• Tipo de documento: Artigo Científico
• Fonte: American Journal of Tropical Medicine and Hygiene; v. 104, n. 2, p. 656-658, FEB 2021.
• Citações Web of Science: 2

Resumo

Although all triatomines are considered as potential vectors of the Chagas disease, the Triatoma, Panstrongylus, and Rhodnius genera are the most important from the epidemiological point of view. Based on cytogenetic analyzes carried out so far (C banding and FISH), the species of the genus Rhodnius show little interspecific chromosomal variation. Thus, we analyzed the distribution of AT- and CG-rich DNA in the chromatin and chromosomes of the genus Rhodnius and discuss the chromosome evolution of these vectors. Except for Rhodnius domesticus, Rhodnius nasutus, Rhodnius pictipes, Rhodnius colombiensis, and Rhodnius pallescens, all Rhodnius species have euchromatic autosomes with the absence of AT- and CG-rich blocks. Curiously, the same species that have heterochromatin blocks in the autosomes also have chromomycin A3 (CMA3+) blocks dispersed in the prophasic nucleus (demonstrating that the heterochromatin of these species is rich in CG). Thus, we characterize the AT- and CG-rich DNA pattern for the genus Rhodnius, and we suggest that the pattern of CG-rich heterochromatin in the autosomes of these vectors evolved independently in pallescens, pictipes, and prolixus groups. (AU)

• Processo FAPESP: 18/23846-6 - Citotaxonomia, estudo do ciclo biológico e caracterização da curva de fertilidade de Rhodnius marabaensis (Hemiptera, Triatominae)
• Beneficiário: Nicoly Olaia
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/11372-1 - Citotaxonomia e evolução cromossômica do complexo prolixus (Hemiptera, Triatominae)
• Beneficiário: Amanda Ravazi
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica