Morphological characters of statoblasts (including floatoblasts and sessoblasts) in freshwater bryozoans have been important in phylactolaemate systematics and identification in that older phylogenetic hypotheses relied heavily on statoblast morphology. To assess the reliability of statoblast characters in drawing conclusions about phylogeny, we examined the phylogenetic distribution of metric ...

To clarify the genetic divergence in the F. limnocharis complex from Thailand and neighboring countries and to elucidate the phylogenetic problems of this taxon, we analyzed partial sequences of the mitochondrial 12S and 16S rRNA genes and the nuclear CXCR4, NCX1, RAG-1, and tyrosinase genes. The F. limnocharis complex from Thailand had three distinct haplotypes for 12S and 16S rRNA genes. Nucl...

A bacterial strain, designated BzDS03 was isolated from water sample, collected from Dal Lake Srinagar. The strain was characterized by using 16S ribosomal RNA gene and 16S-23S rRNA internal transcribed spacer region sequences. Phylogenetic analysis showed that 16S rRNA sequence of the isolate formed a monophyletic clade with genera Escherichia. The closest phylogenetic relative was Escherichia...

Studies on earthworms using molecular markers are rare in Africa except a handful from South Africa. Reports on Libyodrilus violaceous,an earthworm found in West Africaare available including their metal tolerance and bioaccumulation capacity but their molecular characterization and ecotoxicology studies are scarce. In this study, triplicate L. violaceous specimens were collec...

background: the purposes of the present study were morphometric characteri-zation of rostellar hooks of taenia multiceps and to investigate the association of hook length variation and the variability within two mitochondrial genes of sheep isolates of the parasite. methods: up to 4500 sheep brains were examined for the presence of c. cerebralis . biometric characters based on the larval rostel...

Recently, Cangelosi and Brabant used oligonucleotide probes targeting the precursor 16S rRNA of Escherichia coli to demonstrate that the levels of precursor rRNA were more sensitive to changes in growth phase than the levels of total rRNA (G. A. Cangelosi and W. H. Brabant, J. Bacteriol. 179:4457-4463, 1997). In order to measure changes in the levels of precursor rRNA in activated sludge system...

We developed a novel method for the quantitative detection of the 16S rRNA of a specific bacterial species in the microbial community by using deoxyribozyme (DNAzyme), which possesses the catalytic function to cleave RNA in a sequence-specific manner. A mixture of heterogeneous 16S rRNA containing the target 16S rRNA was incubated with a species-specific DNAzyme. The cleaved target 16S rRNA was...

We recovered molecular phylogenetic relationships amongst species of the genus Ablepharus in Iran and Iraq. Partial sequences three mitochondrial genes (cytochrome C oxidase subunit I – COI, 12S rRNA 16S rRNA) were analysed. In addition, taxonomic evaluation Cyprus, India, Greece, Turkey Syria performed using partial gene. Phylogenetic trees estimated genetic distances showed that populations I...

A polycephalic larva of Taeniidae family isolated from abdominal cavity of a great gerbil (Rhombomys opimus) from Golestan province, northern Iran, was subjected to molecular analysis. Genomic DNA from the larva was obtained using a DNA extraction tissue kit. Polymerase chain reaction was performed for amplification of the partial 12S rRNA, cytochrome c oxidase subunit 1 (cox1...