title: Very low levels of genetic variation in natural peridomestic populations of the Chagas disease vector Triatoma sordida (Hemiptera: Reduviidae) in southeastern Brazil.
abstract: Levels of genetic variation and population structure were determined for 181 Triatoma sordida insects from four populations of southeastern Brazil, through the analysis of 28 allozyme loci. None of these loci presented fixed differences between any pair of populations, and only two revealed polymorphism, accounting for low levels of heterozygosity (H(e) = 0.027), and low genetic distances (D < 0.03) among populations. F(ST) and Contingency Table results indicated the existence of genetic structure among populations (F(ST) = 0.214), which were incompatible with the isolation by distance model (Mantel test: r = 0.774; P = 0.249).
authors.affiliation: Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil. fam@ioc.fiocruz.br
authors.forename: Fernando A
authors.initials: FA
authors.lastname: Monteiro
authors.forename: José
authors.initials: J
authors.lastname: Jurberg
authors.forename: Cristiano
authors.initials: C
authors.lastname: Lazoski
mesh_terms: D000818:Animals; D001938:Brazil; D014355:Chagas Disease / Q000635:transmission*; D014644:Genetic Variation; D007303:Insect Vectors / Q000235:genetics*; D014224:Triatoma / Q000235:genetics*