Improved 18S small subunit rDNA primers for problematic nematode amplification
نویسندگان
چکیده
منابع مشابه
Molecular characterization of nuclear small subunit (18S)-rDNA pseudogenes in a symbiotic dinoflagellate (Symbiodinium, Dinophyta).
For the dinoflagellates, an important group of single-cell protists, some nuclear rDNA phylogenetic studies have reported the discovery of rDNA pseudogenes. However, it is unknown if these aberrant molecules are confined to free-living taxa or occur in other members of the group. We have cultured a strain of symbiotic dinoflagellate, belonging to the genus Symbiodinium, which produces three dis...
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A PCR assay for the diagnosis of infection produced by Candida sp. was developed. The primers, designated 520 and 522, were selected from highly-conserved areas of the small subunit (ssu) 18S rRNA gene of Candida spp. To check the value of the results a Candida albicans oligonucleotide probe, digoxigenin-labeled, and a general Candida probe were used in hybridization experiments with the amplif...
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Phylogenies were inferred from nearly complete small subunit (SSU) 18S rDNA sequences of 12 species of Meloidogyne and 4 outgroup taxa (Globodera pallida, Nacobbus abberans, Subanguina radicicola, and Zygotylenchus guevarai). Alignments were generated manually from a secondary structure model, and computationally using ClustalX and Treealign. Trees were constructed using distance, parsimony, an...
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Maximum likelihood trees produced from 18S rDNA sequences separated 14 Xiphinema and five Xiphidorus nematode species from Brazil into distinct groups that concurred with their current morphological taxonomic status. Species belonging to the X. americanum group (X. brevicolle, X. diffusum, X. oxycaudatum, and X. peruvianum) formed a single group that was clearly separated from the other Xiphine...
متن کاملThe widely used small subunit 18S rDNA molecule greatly underestimates true diversity in biodiversity surveys of the meiofauna.
Molecular tools have revolutionized the exploration of biodiversity, especially in organisms for which traditional taxonomy is difficult, such as for microscopic animals (meiofauna). Environmental (eDNA) metabarcode surveys of DNA extracted from sediment samples are increasingly popular for surveying biodiversity. Most eDNA surveys use the nuclear gene-encoding small-subunit rDNA gene (18S) as ...
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ژورنال
عنوان ژورنال: Journal of Nematology
سال: 2018
ISSN: 0022-300X
DOI: 10.21307/jofnem-2018-051