Cytogenetic analysis of Triatoma pseudomaculata Correa and Espinola, 1964 (Hemiptera, Triatominae) from different Brazilian states

Autor(es)

Imperador, C. H. L. ^[1] ; Alevi, K. C. C. ^[1] ; Oliveira, J. ^[2] ; Rosa, J. A. ^[2] ; Azeredo-Oliveira, M. T. V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Biol, Lab Biol Celular, Sao Jose Do Rio Preto, SP - Brazil

^[2] Univ Estadual Paulista, Fac Ciencias Farmaceut, Dept Ciencias Biol, Parasitol Lab, Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Genetics and Molecular Research; v. 15, n. 1 2016.
• Citações Web of Science: 2

Resumo

Triatoma maculata and T. pseudomaculata are allopatric; however, it is believed that T. maculata was introduced into the Brazilian northeast by passive transportation of the nymphs between the feathers of migratory birds, followed by the speciation of T. pseudomaculata. T. pseudomaculata is the second most epidemiologically important species in the northeast of Brazil after T. brasiliensis. Therefore, given the broad range of T. pseudomaculata, the objective of the present study was to cytogenetically analyze different populations of T. pseudomaculata from different Brazilian states in order to investigate possible intraspecific chromosomal variation between them. Three adult T. pseudomaculata males from each population (Pernambuco, Ceara, Paraiba, Bahia, Rio Grande do Norte, and Piaui) were analyzed by lacto-acetic orcein and C-banding. All of the specimens analyzed exhibited the same cytogenetic characteristics, i.e., 22 chromosomes (20 autosomes and XY), a chromocenter formed by the X and Y sex chromosomes and one pair of autosomes, and heterochromatin blocks in three or four pairs of autosomes. These data confirm that all of the populations analyzed were T. pseudomaculata, and although they may be subject to different selection pressures they have maintained the genetic integrity that characterizes the species. (AU)

• Processo FAPESP: 13/19764-0 - Citotaxonomia e evolução cromossômica na subfamília Triatominae
• Beneficiário: Kaio Cesar Chaboli Alevi
• Modalidade de apoio: Bolsas no Brasil - Doutorado