Results 221 to 230 of about 64,103 (261)

dinoref: A curated dinoflagellate (Dinophyceae) reference database for the 18S rRNA gene

Molecular Ecology Resources, 2018
AbstractDinoflagellates are a heterogeneous group of protists present in all aquatic ecosystems where they occupy various ecological niches. They play a major role as primary producers, but many species are mixotrophic or heterotrophic. Environmental metabarcoding based on high‐throughput sequencing is increasingly applied to assess diversity and ...
Mordret, Solenn, Piredda, Roberta, Vaulot, Daniel, Montresor, Marina, Kooistra, Wiebe, Sarno, Diana   +5 more
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The 18S rRNA gene sequences of four commercially important seaweeds

Journal of Applied Phycology, 1992
18S rRNA gene sequences are presented for Ahnfeltia plicata, Chondrus crispus, Furcellaria lumbricalis and Palmaria palmata, commercially important marine algae of the North Atlantic. The sequences range from 1765 to 1777 nucleotides in length, with guanine + cytosine content of 50.1% to 52.4%.
Bird C.J., Murphy C.A., Rice E.L., Ragan M.A.   +3 more
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Analysis of the 18S rRNA gene sequence of a Hepatozoon detected in two Japanese dogs

Veterinary Parasitology, 2002
Partial sequences of the 18S rRNA gene (625 bp) from a Hepatozoon detected in two canine hepatozoonosis cases, one clinical and one subclinical, in Japan were analyzed. Both sequences were identical to each other and they were closely related to the Hepatozoon canis strain found in Israel with 99% (617/625) nucleotide identity.
Hisashi, Inokuma, Masaru, Okuda, Koichi, Ohno, Kazunobu, Shimoda, Takafumi, Onishi   +4 more
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The Cladophora complex (Chlorophyta): new views based on 18S rRNA gene sequences.

Molecular phylogenetics and evolution, 1994
Evolutionary relationships among species traditionally ascribed to the Siphonocladales/Cladophorales have remained unclear due to a lack of phylogenetically informative characters and extensive morphological plasticity resulting in morphological convergence.
Bakker, F.T., Olsen, J.L., Stam, W.T., van den Hoek, J.   +3 more
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PCR‐Based Diversity Estimates of Artificial and Environmental 18S rRNA Gene Libraries

Journal of Eukaryotic Microbiology, 2009
ABSTRACT. Environmental clone libraries constructed using small subunit ribosomal RNA (rRNA) or other gene‐specific primers have become the standard molecular approach for identifying microorganisms directly from their environment. This technique includes an initial polymerase chain reaction (PCR) amplification step of a phylogenetically useful marker
Marianne, Potvin, Connie, Lovejoy
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Phylogenetic Analysis and the Evolution of the 18S rRNA Gene Typing System of Acanthamoeba

Journal of Eukaryotic Microbiology, 2015
AbstractSpecies of Acanthamoeba were first described using morphological characters including cyst structure and cytology of nuclear division. More than 20 nominal species were proposed using these methods. Morphology, especially cyst shape and size, has proven to be plastic and dependent upon culture conditions.
Paul A, Fuerst, Gregory C, Booton, Monica, Crary   +2 more
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GENOTYPING OF BALAMUTHIA MANDRILLARIS BASED ON NUCLEAR 18S AND MITOCHONDRIAL 16S rRNA GENES

The American Journal of Tropical Medicine and Hygiene, 2003
Balamuthia mandrillaris is an opportunistically pathogenic ameba that causes fatal granulomatous amebic encephalitis (GAE) in vertebrates. Previous phylogenetic analyses that included the sequence of a single nuclear small subunit ribosomal RNA gene (18S or ssu rDNA) from this ameba suggested that Balamuthia is closely related to Acanthamoeba, another ...
Gregory C, Booton, Jennifer R, Carmichael, Govinda S, Visvesvara, Thomas J, Byers, Paul A, Fuerst   +4 more
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Typing of sandflies from Greece and Cyprus by DNA polymorphism of 18S rRNA gene

Insect Molecular Biology, 1999
Abstract A simple and reliable technique was developed to distinguish Phlebotomine sandflies by restriction fragment length polymorphism of PCR‐amplified (PCR‐RFLP) 18S rDNAs. Seven morphologically identified sandflies species from several localities of Greece and Cyprus were studied, and specific patterns were ...
L. M. Field, A. A. James, A. M. Aransay, E. Scoulica, B. Chaniotis, Y. Tselentis   +5 more
openaire   +2 more sources

Novel Acanthamoeba 18S rRNA gene sequence type from an environmental isolate

Parasitology Research, 2014
The free-living amoebae, Acanthamoeba, can act as opportunistic parasites on a wide range of vertebrates and are becoming a serious threat to human health due to the resistance of their cysts to harsh environmental conditions, disinfectants, some water treatment practices, and their ubiquitous distribution.
A, Magnet, N, Henriques-Gil, A L, Galván-Diaz, F, Izquiedo, S, Fenoy, C, del Aguila   +5 more
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Affinities of the Gyliauchenidae: Utility of the 18S rRNA gene for phylogenetic inference in the digenea (Platyhelminthes)

International Journal for Parasitology, 1993
18S rRNA sequences were analysed using parsimony and distance matrix methods to infer relationships among 8 species of trematodes. In particular, the disputed relationships of the digenean family Gyliauchenidae were examined. This family is regarded by some to be close to the Lepocreadiidae, and by others to be close to the Paramphistomidae.
Blair, D., Barker, S. C.
openaire   +5 more sources