Cytogenetic study of holocentric chromosomes in three species of triatomines (Heteroptera, Reduvidae)

Abstract

In the present work, spermatogenesis was analyzed in 3 species of the genus Triatoma (T. platensis, T. proctata, T. tibiamaculata). Lacto-acetic orcein staining was used in order to investigate chromosomal meiotic behavior of these species. It allowed the identification of the T. tibiamaculata karyotype (20, X 1X 2Y), the observation that in T. protacta doesn't occur late migration of sexual chromosomes and corroborated knowledgments about holocentric chromosome nature.