New arrangements on several species subcomplexes of Triatoma genus based on the chromosomal position of ribosomal genes (Hemiptera - Triatominae)

Made available in DSpace on 2018-12-11T17:03:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-09-01 The hemipteran subfamily Triatominae includes 150 blood-sucking species, vectors of Chagas disease. By far the most specious genus is Triatoma, assembled in groups, complexes and subcomplexes based on morphological similarities, geographic distribution and genetic data. However, many molecular studies questioned the species integration of several subcomplexes as monophyletic units. In triatomines, chromosomal position of major ribosomal DNA (rDNA) loci is extremely variable but seems to be species-specific and an evolutionary conserved genetic trait, so that closely related species tend to have ribosomal clusters in the same chromosomal location. Considering that the autosomal position as the ancestral character for all heteropteran species, including triatomines, we suggest that the movement of rDNA loci from autosomes to sex chromosomes rapidly established reproductive barriers between divergent lineages. We proposed that the rDNA translocation from the autosomes to the sex chromosomes restrict reproductive compatibility and eventually promote speciation processes. We analyzed the chromosomal position of 45S rDNA clusters in almost all species of the matogrossensis, rubrovaria, maculata and sordida subcomplexes. The fluorescent in situ hybridization results are discussed considering the available genetic data and we proposed new arrangements in the species that constitute each one of these subcomplexes. Sección Genética Evolutiva Facultad de Ciencias Universidad de la República Departamento de Biología Experimental Área de Genética Universidad de Jaén Cátedra de Introducción a la Biología Facultad de Ciencias Exactas Físicas y Naturales Inst de Investigaciones Biologicas y Tecnologicas (IIByT) Univ. Nacional de Cordoba (UNC-CONICET) Lab. Nacional e Internacional de Referência em Taxonomia de Triatomíneos Instituto Oswaldo Cruz - FIOCRUZ Lab. de Biologia Celular Departamento de Biologia Inst. de Biociências Letras e Ciências Exatas Universidade Estadual Paulista 'Júlio de Mesquita Filho' (IBILCE-UNESP) Lab. Interdisciplinar de Vigilância Entomológica em Diptera e Hemiptera (LIVEDIH) Instituto Oswaldo Cruz/Fundação Oswaldo Cruz Programa de Pós-Graduação em Biologia Animal Universidade Federal Rural do Rio de Janeiro Laboratorio de Eco-Epidemiología Departamento de Ecología Genética y Evolución Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires (IEGEBA-UBA-CONICET) Lab. de Biologia Celular Departamento de Biologia Inst. de Biociências Letras e Ciências Exatas Universidade Estadual Paulista 'Júlio de Mesquita Filho' (IBILCE-UNESP)