نتایج جستجو برای: multilocus study

تعداد نتایج: 3972641  

Journal: :Journal of clinical microbiology 2006
Ning Zhang Kerry O'Donnell Deanna A Sutton F Ameena Nalim Richard C Summerbell Arvind A Padhye David M Geiser

Members of the Fusarium solani species complex (FSSC) are increasingly implicated as the causative agents of human mycoses, particularly in the expanding immunocompromised and immunosuppressed patient populations. Best known as ubiquitous plant pathogens and saprotrophs, the FSSC comprises over 45 phylogenetically distinct species distributed among three major clades. To identify which species ...

2015
Jonathan Brassac Frank R. Blattner

Polyploidization is an important speciation mechanism in the barley genus Hordeum. To analyze evolutionary changes after allopolyploidization, knowledge of parental relationships is essential. One chloroplast and 12 nuclear single-copy loci were amplified by polymerase chain reaction (PCR) in all Hordeum plus six out-group species. Amplicons from each of 96 individuals were pooled, sheared, lab...

2001
Daniel Ajzenberg Anne-Laure Bañuls Michel Tibayrenc Marie Laure Dardé

Previous studies on Toxoplasma gondii population structure, based essentially on multilocus restriction fragment length polymorphism analysis or on multilocus enzyme electrophoresis, indicated that T. gondii comprises three clonal lineages. These studies showed a weak polymorphism of the markers (2–4 alleles by locus). In this study, we used eight microsatellite markers to type 84 independent i...

Journal: :Genetic epidemiology 1997
H K Tiwari R C Elston

Several authors have considered two-locus models as a basis for the inheritance of complex diseases. The purpose of this paper is to give a simple general formulation to derive the additive, dominant, and epistatic effects, and hence the corresponding variance components, for any multilocus model. These variance components should be useful for investigating the power of model-free linkage analy...

Journal: :Genetics 2002
Arcadio Navarro Nick H Barton

We studied the effect of multilocus balancing selection on neutral nucleotide variability at linked sites by simulating a model where diallelic polymorphisms are maintained at an arbitrary number of selected loci by means of symmetric overdominance. Different combinations of alleles define different genetic backgrounds that subdivide the population and strongly affect variability. Several multi...

Journal: :Applied and environmental microbiology 2010
Giovanni Widmer Yongsun Lee

The genotyping of numerous isolates of Cryptosporidium parasites has led to the definition of new species and a better understanding of the epidemiology of cryptosporidiosis. A single-locus genotyping method based on the partial sequence of a polymorphic sporozoite surface glycoprotein gene (GP60) has been favored by many for surveying Cryptosporidium parvum and C. hominis populations. Since ge...

Journal: :Fungal genetics and biology : FG & B 1999
U L Rosewich R E Pettway B A McDonald H C Kistler

To date, much of the genetics of the basidiomycete Thanatephorus cucumeris (anamorph = Rhizoctonia solani) remains unknown. Here, we present a population genetics study using codominant markers to augment laboratory analyses. Seven single-copy nuclear RFLP markers were used to examine 182 isolates of Rhizoctonia solani AG-1 IA collected from six commercial rice fields in Texas. Thirty-six multi...

احمدی, ماندانا , بدلی, حمید , حسن پور, زهرا , خداویسی, صادق , رضایی, ساسان , روشن, ریحانه , محمد داودی, مهرناز , فلاحتی نژاد, مهسا ,

Conidia of Aspergillus species are widely distributed and ubiquitous in outdoor and hospital environments. There are high numbers of patients with weakened immune systems, therefore Aspergillus infections are increasing in hospitals. Molecular typing of Aspergillus strains obtained from patients and their environment is an important tool for epidemiological and public health studies. Fingerprin...

Journal: :Emerging Infectious Diseases 2008
Björn Herrmann Anna Törner Nicola Low Markus Klint Anders Nilsson Inga Velicko Thomas Söderblom Anders Blaxhult

A variant of Chlamydia trachomatis that had escaped detection by commonly used systems was discovered in Sweden in 2006. In a nationwide study, we found that it is now prevalent across Sweden, irrespective of the detection system used. Genetic analysis by multilocus sequence typing identified a predominant variant, suggesting recent emergence.

Journal: :Antimicrobial agents and chemotherapy 2004
Ralf R Reinert Rudolf Lütticken Joyce A Sutcliffe Amelia Tait-Kamradt Murat Y Cil Holger M Schorn André Bryskier Adnan Al-Lahham

In a nationwide study in Germany, a total of 381 Streptococcus pyogenes were collected. Erythromycin A-resistant strains were characterized for the underlying resistance genotype, showing 55.6% had the efflux type mef(A), 31.5% had erm(A), and 13.0% had erm(B). A total of 23 different multilocus sequence types were observed.

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