title: Analysis of the first and second internal transcribed spacer sequences of the ribosomal DNA in Biomphalaria tenagophila complex (Mollusca: Planorbidae).
abstract: The first and second internal transcribed spacer regions (ITS1 and ITS2) of the ribosomal DNA of Biomphalaria tenagophila complex (B. tenagophila, B. occidentalis, and B. t. guaibensis) were sequenced and compared. The alignment lengths of these regions were about 655 bp and 481 bp, respectively. Phylogenetic relationships among the Biomphalaria species were inferred by Maximum Parsimony and Neighbor-joining methods. The phylogenetic trees produced, in most of the cases, were in accordance with morphological systematics and other molecular data previously obtained by polymerase chain reaction and restriction fragment length polymorphism analysis. The present results provide support for the proposal that B. tenagophila represents a complex comprising B. tenagophila, B. occidentalis and B. t. guaibensis.
authors.affiliation: Centro de Pesquisas René Rachou-Fiocruz, Av. Augusto de Lima, 1715, 30190-002 Belo Horizonte, MG, Brasil.
authors.forename: Teofânia H D A
authors.initials: TH
authors.lastname: Vidigal
authors.forename: Linus
authors.initials: L
authors.lastname: Spatz
authors.forename: Jessica C
authors.initials: JC
authors.lastname: Kissinger
authors.forename: Rodrigo A F
authors.initials: RA
authors.lastname: Redondo
authors.forename: Edina C R
authors.initials: EC
authors.lastname: Pires
authors.forename: Andrew J G
authors.initials: AJ
authors.lastname: Simpson
authors.forename: Omar S
authors.initials: OS
authors.lastname: Carvalho
mesh_terms: D000818:Animals; D001483:Base Sequence; D001700:Biomphalaria / Q000145:classification / Q000235:genetics*; D018509:DNA, Helminth / Q000235:genetics*; D021903:DNA, Ribosomal Spacer / Q000235:genetics*; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction
chemical_list: D018509:DNA, Helminth; D021903:DNA, Ribosomal Spacer