Cytogenetic study on three species of the genusTriatoma(Heteroptera: Reduviidae) with emphasis on nucleolar organizer regions

Severi-Aguiar Grasiela Dias de Campos, Maria Tercília Vilela de Azeredo-Oliveira
2005 Caryologia (Firenze)  
Cristó vão Colombo n°2265, Caixa Postal 136, São José do Rio Preto, CEP 15054-000, São Paulo, Brasil. Fax +55 17 32212380. Abstrat -The use of banding techniques allows the recognition of chromosomal pairs and karyotypical arrangements. However, its application in Heteroptera holocentric chromosomes is limited. Thus, little is known about their structure, specially their Nucleolar Organizer Regions (NORs). A comparative analysis of the nucleolar characteristics present during spermatogenesis in
more » ... spermatogenesis in Triatoma platensis, Triatoma protacta and Triatoma tibiamaculata seems to indicate that in this group of insects nucleolar fragmentation occurs after prophase I. The study of chromosomal structure of these triatomines indicates that NORs are located at some telomeric and interstitial autosome regions and at sexual chromosomes (X/X 1 X 2 ).
doi:10.1080/00087114.2005.10589466 fatcat:id54fhys2zbhhowpvn23qpssmq