Cytogenetic analysis of Triatoma pseudomaculata Corrêa and Espínola, 1964 (Hemiptera, Triatominae) from different Brazilian states
| Autor: | Kaio Cesar Chaboli Alevi, Jose A. Puppim de Oliveira, Maria Tercília Vilela de Azeredo-Oliveira, Carlos Henrique Lima Imperador, João Aristeu da Rosa |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Range (biology) 030231 tropical medicine Population Allopatric speciation Zoology Intraspecific competition 03 medical and health sciences 0302 clinical medicine Genetics Animals Triatoma Nymph education Molecular Biology Triatominae education.field_of_study Autosome biology General Medicine biology.organism_classification Hemiptera 030104 developmental biology Cytogenetic Analysis Brazil |
| Zdroj: | Genetics and Molecular Research. 15 |
| ISSN: | 1676-5680 |
| Popis: | 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, Ceará, Paraíba, Bahia, Rio Grande do Norte, and Piauí) 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. |
| Databáze: | OpenAIRE |
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