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... Taxonomic and phylogenetic fingerprinting based on sequence analysis of gene fragments from the large-subunit rRNA (LSU) gene or the internal transcribed spacer (ITS) region is becoming an integral part of fungal classification. The lack of an accurate and robust classification tool trained by a validated sequence database for taxonomic placement of fungal LSU genes is a severe limitation in taxon ...
DNA primers; RNA; West Nile virus; cell culture; genes; genetic markers; genetic stability; mutants; phenotype; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; single nucleotide polymorphism; site-directed mutagenesis; viral load; viruses
Abstract:
... To enable in vivo and in vitro competitive fitness comparisons among West Nile viruses (WNV), three reference viruses were marked genetically by site-directed mutagenesis with five synonymous nucleotide substitutions in the envelope gene region of the genome. Phenotypic neutrality of the mutants was assessed experimentally by competitive replication in cell culture and genetic stability of the sub ...
... Allelic expression variation of nonimprinted autosomal genes has recently been uncovered in mouse hybrids and humans. The allelic expression variation is attributed to differences in noncoding DNA sequences and does not involve epigenetic regulation or gene imprinting. This expression variation is suggested to play important roles in determining phenotypic diversity. Virtually nothing is known abo ...
loci; open reading frames; DNA primers; polymerase chain reaction; pathogen identification; food pathogens; genotype; Listeria monocytogenes; genetic polymorphism; Escherichia coli
Abstract:
... DNA-based methods are increasingly important for bacterial typing. The high number of polymorphic sites present among closely related bacterial genomes is the basis for the presented method. The method identifies multilocus genomic polymorphisms in intergenic regions termed AILP (amplified intergenic locus polymorphism). For each locus, a pair of unique PCR primers was designed to amplify an inter ...
DNA; DNA primers; ammonia; bacteria; basins; biogeochemical cycles; denaturing gradient gel electrophoresis; fluorescence in situ hybridization; nucleotide sequences; oxidation; ribosomal RNA; sediments; Chesapeake Bay
Abstract:
... The discovery of bacteria capable of anaerobic ammonia oxidation (anammox) has generated interest in understanding the activity, diversity, and distribution of these bacteria in the environment. In this study anammox activity in sediment samples obtained from the Inner Harbor of Baltimore, Md., was detected by ¹⁵N tracer assays. Anammox-specific oligonucleotide primer sets were used to screen a Pl ...
Archaea; DNA libraries; DNA primers; canyons; clones; community structure; electrons; genes; methane; microbial communities; molecular cloning; oxidation; polymerase chain reaction; ribosomal RNA; sediments; sulfates; Gulf of Mexico
Abstract:
... Sediments overlying a brine pool methane seep in the Gulf of Mexico (Green Canyon 205) were analyzed using molecular and geochemical approaches to identify geochemical controls on microbial community composition and stratification. 16S rRNA gene and rRNA clone libraries, as well as mcrA gene clone libraries, showed that the archaeal community consists predominantly of ANME-1b methane oxidizers; no ...
... Background: Rainbow trout (Oncorhynchus mykiss) are cultivated worldwide for aquaculture production and are widely used as a model species to gain knowledge of many aspects of fish biology. The common ancestor of the salmonids experienced a whole genome duplication event, making extant salmonids such as the rainbow trout an excellent model for studying the evolution of tetraploidization and re-dip ...
Arthrobacter; DNA libraries; DNA primers; Escherichia coli; NAD (coenzyme); Northern blotting; adenine; carbon; clones; dehalogenation; energy; gene expression; hydroquinone; hydroxylation; multigene family; p-nitrophenol; reverse transcriptase polymerase chain reaction; screening
Abstract:
... Arthrobacter sp. strain IF1 is able to grow on 4-fluorophenol (4-FP) as a sole source of carbon and energy. To clone the 4-FP degradation genes, DNA libraries were constructed and screened with a probe obtained by PCR using primers designed on the basis of conserved regions of aromatic two-component monooxygenases. Sequencing of positive clones yielded two gene clusters, each harboring a gene enco ...
... Genetic structure and relationships of 130 lentil accessions belonging to six taxa were analysed. For this purpose, seven morphological traits and 31 polymorphic simple sequence repeat (SSR) primers were used for this purpose. Morphological traits grouped lentil accessions into five main clusters. SSR primers collectively amplified 139 polymorphic alleles in a range of 2–10 with an average of 4.48 ...
Triticum turgidum; Southern blotting; Elytrigia; cultivars; hybrids; restriction fragment length polymorphism; intergeneric hybridization; random amplified polymorphic DNA technique; backcrossing; Thinopyrum pycnanthum; DNA primers; Leymus; DNA; genomics; Elymus; Thinopyrum elongatum; Thinopyrum bessarabicum; genetic markers
Abstract:
... The objective of this study was to detect the presence of alien chromatin in intergeneric hybrids of durum wheat (Triticum turgidum, 2n = 4x = 28; AABB genomes) with the perennial grass Thinopyrum junceiforme (2n = 4x = 28; J1J1J2J2) using RAPD markers. The first step was to identify amplification of species-specific DNA markers in the parental grass species and durum wheat cultivars. Initially, t ...
... BACKGROUND: Gastrodia flabilabella is a mycoheterotrophic orchid that obtains carbohydrates and nutrients from its symbiotic mycorrhizal fungi. The species is an endemic and vulnerable species enlisted in the “A Preliminary Red List of Taiwanese Vascular Plants” according to the IUCN Red List Categories and Criteria Version 3.1. G. flabilabella dwells the underground of broadleaf and coniferous fo ...
DNA primers; activated sludge; flow cytometry; fluorescence; fluorescence in situ hybridization; genes; nucleotide sequences; phosphorus; phylogeny; polymerase chain reaction; population structure; ribosomal RNA; sodium acetate; sorting; species diversity
Abstract:
... To investigate the fine-scale diversity of the polyphosphate-accumulating organisms (PAO) "Candidatus Accumulibacter phosphatis" (henceforth referred to as "Ca. Accumulibacter"), two laboratory-scale sequencing batch reactors (SBRs) for enhanced biological phosphorus removal (EBPR) were operated with sodium acetate as the sole carbon source. During SBR operations, activated sludge always contained ...
restriction fragment length polymorphism; endophytes; sandy soils; Mycobacterium; ribosomal RNA; loam soils; DNA primers; wheat; Triticum aestivum; species diversity; Kitasatospora; Streptomyces; genes; nucleotide sequences; roots; sandy loam soils; South Australia
Abstract:
... The endophytic actinobacterial population in the roots of wheat grown in three different soils obtained from the southeast part of South Australia was investigated by terminal restriction fragment length polymorphism (T-RFLP) analysis of the amplified 16S rRNA genes. A new, validated approach was applied to the T-RFLP analysis in order to estimate, to the genus level, the actinobacterial populatio ...
... A sensitive and specific detection method was developed for Xanthomonas hyacinthi; this method was based on amplification of a subsequence of the type IV fimbrial-subunit gene fimA from strain S148. The fimA gene was amplified by PCR with degenerate DNA primers designed by using the N-terminal and C-terminal amino acid sequences of trypsin fragments of FimA. The nucleotide sequence of fimA was det ...
Abies alba; DNA primers; cDNA libraries; complementary DNA; conifers; genes; proteins; seedlings; single nucleotide polymorphism; transcriptome
Abstract:
... Premise of the study: We present a protocol for the annotation of transcriptome sequence data and the identification of candidate genes therein using the example of the nonmodel conifer Abies alba. Methods and Results: A normalized cDNA library was built from an A. alba seedling. The sequencing on a 454 platform yielded more than 1.5 million reads that were de novo assembled into 25 149 contigs. T ...
... In a previous study (Mikiciński et al. in Eur J Plant Pathol, doi: 10.1007/s10658-015-0837-y , 2015), we described the characterization of novel strain 49M of Pseudomonas graminis, isolated from the phyllosphere of apple trees in Poland showing a good protective activity against fire blight on different organs of host plants. We now report investigations to clarify the basis for this activity. Str ...
... The antibiotic resistances of 45 lactic acid bacteria strains belonging to the genera Lactobacillus, Streptococcus, Lactococcus, Pediococcus, and Leuconostoc were investigated. The objective was to determine antibiotic resistances and to verify these at the genetic level, as is currently suggested by the European "qualified presumption of safety" safety evaluation system for industrial starter str ...
... Plant growth-promoting rhizobacteria (PGPR) have been reported to influence plant growth, yield, and nutrient uptake by an array of mechanisms. Uncovering the behavioral dynamics of PGPR is one of the most important issues necessary for understanding their functional performances. In this study, strain NJAU-Z9 which was found to possess complex functions and efficient rhizospheric colonization abi ...
yersiniosis; human diseases; amplified fragment length polymorphism; sheep; cattle; fluorescence; DNA primers; biotypes; swine; strains; Yersinia enterocolitica; animal diseases
Abstract:
... An amplified fragment length polymorphism (AFLP) method, developed to genotype Yersinia enterocolitica, has been used to investigate 70 representative strains isolated from humans, pigs, sheep, and cattle in the United Kingdom. AFLP primarily distinguished Y. enterocolitica strains according to their biotype, with strains dividing into two distinct clusters: cluster A, comprising largely the putat ...