ABSTRACT
To assess differentiation and relationships between Anopheles lesteri and Anopheles paraliae we established three and five iso-female lines of An. lesteri from Korea and An. paraliae from Thailand, respectively. These isolines were used to investigate the genetic relationships between the two taxa by crossing experiments and by comparing DNA sequences of ribosomal DNA second internal transcribed spacer (ITS2) and mitochondrial DNA cytochrome c oxidase subunit I (COI) and subunit II (COII). Results of reciprocal and F1-hybrid crosses between An. lesteri and An. paraliae indicated that they were compatible genetically producing viable progenies and complete synaptic salivary gland polytene chromosomes without inversion loops in all chromosome arms. The pairwise genetic distances of ITS2, COI and COII between these morphological species were 0.040, 0.007-0.017 and 0.008-0.011, respectively. The specific species status of An. paraliae in Thailand and/or other parts of the continent are discussed.
Subject(s)
Anopheles/genetics , Crosses, Genetic , DNA, Mitochondrial/genetics , DNA, Ribosomal Spacer/genetics , Animals , Anopheles/classification , Electron Transport Complex IV/genetics , Female , Karyotyping , Republic of Korea , Sequence Analysis, DNA , ThailandABSTRACT
To assess differentiation and relationships between Anopheles lesteri and Anopheles paraliae we established three and five iso-female lines of An. lesteri from Korea and An. paraliae from Thailand, respectively. These isolines were used to investigate the genetic relationships between the two taxa by crossing experiments and by comparing DNA sequences of ribosomal DNA second internal transcribed spacer (ITS2) and mitochondrial DNA cytochrome c oxidase subunit I (COI) and subunit II (COII). Results of reciprocal and F1-hybrid crosses between An. lesteri and An. paraliae indicated that they were compatible genetically producing viable progenies and complete synaptic salivary gland polytene chromosomes without inversion loops in all chromosome arms. The pairwise genetic distances of ITS2, COI and COII between these morphological species were 0.040, 0.007-0.017 and 0.008-0.011, respectively. The specific species status of An. paraliae in Thailand and/or other parts of the continent are discussed.
Subject(s)
Animals , Female , Anopheles/genetics , Crosses, Genetic , DNA, Mitochondrial/genetics , DNA, Ribosomal Spacer/genetics , Anopheles/classification , Electron Transport Complex IV/genetics , Karyotyping , Republic of Korea , Sequence Analysis, DNA , ThailandABSTRACT
Dengue virus infection has been recognized as an important public health problem in the Dominican Republic in the last decade. Complete genomic sequences of three strains of dengue type 2 (DEN-2) virus, DR23/01 and DR31/01 isolated from dengue fever (DF) patients, and DR59/01 isolated from a dengue hemorrhagic fever (DHF) patient, all with primary infection, in the Dominican Republic in 2001, have been established. This achievement constitutes the first genomic characterization of DEN-2 strains from the Dominican Republic. No amino acid differences were observed between the strains isolated from DHF and DF patients. They exhibited extensive homology with the strain from La Martinique, French West Indies. Although phylogenetic analysis was suggestive of their Southeast Asiatic origin, Dominican Republic strains and other Caribbean strains from La Martinique and Jamaica showed 26 amino acid changes that differed from both the Southeast Asia and native American genotypes.