title: Chromosome homogeneity in populations of Triatoma brasiliensis Neiva 1911 (Hemiptera - reduviidae - triatominae).
abstract: Triatoma brasiliensis is the most important vector of Chagas disease in the semiarid zone of the Northeast of Brazil. Several authors have reported the occurrence of four chromatic patterns with morphological, ecological, and genetic differences. In order to determine the existence of cytogenetic differentiation between these chromatic forms, we analyzed their karyotypes and the chromosome behavior during the male meiotic process. Triatoma brasiliensis shows distinct and specific chromosome characteristics, which differ from those observed in all other triatomine species. However, no cytogenetic differences were observed between the four chromatic forms of T. brasiliensis. The lack of chromosome differentiation among them could indicate that the populations of this species are in a process of differentiation that does not involve their chromosomal organization.
authors: Sección Genética Evolutiva, Facultad de Ciencias, Montevideo, Uruguay. panzera@fcien.edu.uy
authors: F
authors: F
authors: Panzera
authors: R
authors: R
authors: Pérez
authors: P
authors: P
authors: Nicolini
authors: S
authors: S
authors: Hornos
authors: J
authors: J
authors: Costa
authors: E
authors: E
authors: Borges
authors: L
authors: L
authors: Diotaiuti
authors: C J
authors: CJ
authors: Schofield
mesh_terms: D000818:Animals; D002875:Chromosomes / Q000235:genetics*; D020732:Cytogenetic Analysis; D014644:Genetic Variation; D007303:Insect Vectors / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D008540:Meiosis; D010641:Phenotype; D012730:Sex Chromosomes / Q000235:genetics; D014224:Triatoma / Q000235:genetics*