Define Microsatellite repeats. Microsatellite repeats synonyms, Microsatellite repeats pronunciation, Microsatellite repeats translation, English dictionary definition of Microsatellite repeats. n. 1. A short sequence of DNA consisting of multiple repetitions of a set of two to nine base pairs, used as a genetic marker when individuals differ in the...
Hybridisation-capture was used to create 12 unique alpaca DNA libraries each enriched for a different tetranucleotide microsatellite motif. Two hundred and forty nine microsatellites were found, of which 26 were polymorphic (motifs GGAT, GTTT and GCAC). Nine markers were fully characterised on 45 samples. Allele numbers ranged from 6 (Locus P135) to 12 (loci P149 and PCTD17). There was no evidence of linkage disequilibrium at any locus (p = 0.064 - 1). Deviation from Hardy-Weinberg equilibrium was observed in three loci after Bonferroni correction (PCTD17, P135 and P193). Null alleles were detected at loci P147, P193 and P194. Polymorphic information content ranged from 0.48 to 0.82. When combined, the markers had an exclusion probability of 97.7%. Two polymerase chain reaction multiplex sets comprising six and three markers each were optimized. These multiplex sets will be useful for parentage determination, and individually the markers will add to the pool of markers available for mapping of ...
An experimental procedure using biotin-labelled probes and streptavidin-bound magnetic beads (FIASCO) was used to produce a microsatellite-enriched library for the collembolan Orchesella villosa. PCR primers were successfully constructed for seven loci containing, respectively, five pure, one interrupted, and one compound dinucleotide microsatellite repeats. As a preliminary test of their variability, we investigated 15 individuals from 5 locations inside a dismissed mining area in southern Tuscany. All microsatellite loci showed high levels of polymorphism. The mean number of different alleles at each locus across populations was 10.1 and observed heterozygosity per locus was 0.13-0.86. Only 2 out of the 7 loci appeared to be in Hardy-Weinberg equilibrium. The potential application of these loci to test the effects of environmental contamination on the genetic structure of exposed populations is discussed.. ...
Figure 1: (a) Microsatellite instability was originally assessed using gel electrophoresis and autoradiographic detection. In the left panel, additional bands (black arrows) in the tumor lane illustrate multiple contracted microsatellite alleles relative to the genomic control lane. In the right panel, an information (heterozygous) microsatellite is shown in the genomic control sample, and a significant loss of signal intensity for the smaller allele is observed in the tumor sample, characteristic of allelic imbalance/loss of heterozygosity (LOH). (b) Microsatellite loci are now commonly assessed using fluorescent PCR amplifications, capillary electrophoresis, and automated sequencing techniques. Laser scanners detect fluorescent PCR products and generate a chromatogram displaying microsatellite allele frequencies. Note in the tumor panel, one of the alleles has undergone contraction, depicting MSI in this tumor specimen. (c) Subcloning and direct sequencing of microsatellite amplifications can ...
The goals of this investigation were to identify and evaluate the use of polymorphic microsatellite marker (PMM) analysis for molecular typing of seventeen plant pathogenic fungi. Primers for di-, tri-, and tetranucleotide loci were designed directly from the recently published genomic sequence of Mycospherlla graminicola and Fusarium graminearum. A total of 20 new microsatellite primers as easy-to-score markers were developed. Microsatellite primer PCR (MP-PCR) yielded highly reproducible and complex genomic fingerprints, with several bands ranging in size from 200 to 3000 bp. Of the 20 primers tested, only (TAGG)4, (TCC)5 and (CA)7T produced a high number of polymorphic bands from either F. graminearum or F. culmorum. (ATG)5 led to successful amplifications in M. graminicola isolates collected from Germany. Percentage of polymorphic bands among Fusarium species ranged from 9 to 100%. Cluster analysis of banding patterns of the isolates corresponded well to the established species delineations based
Despite the central significance of microsatellite mutations to issues of genomic instability, forensic testing, and population genetic analyses, the rate of origin and spectrum of effects of such mutations are still poorly understood, with many estimates being derived from reporter constructs in yeast cultures (e.g., Henderson and Petes 1992; Strand et al. 1995; Wierdl et al. 1996; Sia et al. 1997). Our long-term series of mutation-accumulation lines of C. elegans and D. pulex provide a useful platform for a more direct evaluation of the properties of microsatellite mutations in two key model organisms.. As in previous studies (Wierdl et al. 1997; Brinkmann et al. 1998; Kayser et al. 2000; Beck et al. 2003; Whittaker et al. 2003; Legendre et al. 2007), we find a strong correlation between allele size (repeat number) and mutation rate in C. elegans (Figure 1). In addition, although the variation of repeat numbers among loci sampled in D. pulex does not permit a formal evaluation of length ...
Objectives: Tumors with high-frequency microsatellite instability (MSI-H) have unique biological behavior and the predictive role of microsatellite instability (MSI) status on survival of colorectal cancer is still debated. The prognostic significance of MSI status in sporadic stage II and III rectal cancer patients needs to be more precisely defined. So we investigated the relationship between MSI status and clinicopathological features and prognosis in these patients. Methods: DNAs from fresh-frozen paired samples of tumors and corresponding normal tissue from 128 stage II and III rectal cancer patients were analyzed for MSI by PCR amplification using markers recommended by a National Cancer Institute workshop on MSI. To assess prognostic significance, Cox proportional hazards modeling was used. Results: Twelve (9.3%) tumors in our study were MSI-H, 28 (21.9%) were low-frequency MSI (MSI-L) and 88 (68.8%) were microsatellite stable (MSS). Most of the MSI-H tumors compared with MSI-L and MSS ...
To date, two forms of microsatellite instability (MSI) have been described in human cancer. MSI typical of hereditary nonpolyposis colon cancer (HNPCC), is due to deficient DNA mismatch repair (MMR) and is defined with mono- and dinucleotide repeat microsatellites. A second variety of instability is best seen at selective tetranucleotide repeats (EMAST; elevated microsatellite alterations at select tetranucleotides). While MSI occurs infrequently in bladder cancers, EMAST is common. Sporadic tumours with the largest proportion showing MSI are those found most frequently in HNPCC kindreds. While bladder cancer is not frequently seen in HNPCC, upper urinary tract tumours (UTTs) are. Having previously found a low frequency of MSI in bladder cancer, we sought to determine the relative levels of MSI and EMAST in transitional cell carcinoma (TCC) of the upper and lower urinary tracts. Microsatellite analysis was performed at 10 mono- and dinucleotide and eight tetranucleotide loci, in 89 bladder and 71 UTT
Microsatellite analysis includes PCR amplification of the microsatellite loci using fluorescently labeled primers; labeled PCR products are then analyzed by capillary electrophoresis (CE) or electrophoresis to separate the alleles by size. We have more than 800 markers to choose from and will be happy to discuss them in more detail with you. We will need 10ul/marker of 30-50ng/ul DNA in Strip tubes.. We ask that all new clients either call or email Ross Wilson to discuss your projects details.. Phone: 214-648- ...
Microsatellite enrichment is a method in molecular biology used for enriching the amount of microsatellite sequences in a DNA sample. This can be achieved by designing oligonucleotide probes that hybridize with the repeats in the microsatellites and then pull out the probe/microsatellite complexes from the solution. This has been shown to be a cost-effective method to sample the genetic diversity in non-model organisms. Kaukinen KH, Supernault KJ, Miller KM (2004). "Enrichment of tetranucleotide microsatellite loci from invertebrate species". Journal of Shellfish Research. 23 (2): 621. Jennings, TN; Knaus, BJ; Mullins, TD; Haig, SM; Cronn, RC (2011-06-16). "Multiplexed microsatellite recovery using massively parallel sequencing". Molecular ecology resources. 11 (6): 1060-7. doi:10.1111/j.1755-0998.2011.03033.x. PMID 21676207 ...
Mismatch repair protein deficiency (MMR-D) and high microsatellite instability (MSI-H) are features of Lynch syndrome-associated colorectal carcinomas and have implications in clinical management. We evaluate the ability of a targeted next-generation sequencing panel to detect MMR-D and MSI-H based on mutational phenotype. Using a criterion of ,40 total mutations per megabase or ,5 single-base insertion or deletion mutations in repeats per megabase, sequencing achieves 92% sensitivity and 100% specificity for MMR-D by immunohistochemistry in a training cohort of 149 colorectal carcinomas and 91% sensitivity and 98% specificity for MMR-D in a validation cohort of 94 additional colorectal carcinomas. False-negative samples are attributable to tumor heterogeneity, and next-generation sequencing results are concordant with analysis of microsatellite loci by PCR. In a subset of 95 carcinomas with microsatellite analysis, sequencing achieves 100% sensitivity and 99% specificity for MSI-H in the ...
The present study deals with the assessment of genetic diversity using microsatellite marker in the fish Labeo gonius from Nanak Sagar and Dhaura reservoirs of Uttarakhand having different morpho-edhaphic features and self- recruiting populations of this fish. These reservoirs are distantly located and distinctly separated without any connection having negligible possibility of gene exchange with each other. Total 12 cross amplified microsatellite primers after using software Primer-BLAST and Primer-3 were screened in all 100 DNA samples of fish collected from both the reservoirs. 12 cross amplified microsatellite primers were screened and successfully amplified. After PCR amplification of microsatellite loci and performing native PAGE using amplified DNA samples as above, POP GENE Version 1.32 was used to calculate Neis observed heterozygosity, expected heterozygosity, Neis genetic diversity, Fixation index (Fis) and Shannons information index (SI) and genetic variability indices viz. Gene flow(Nm),
Read "Isolation and characterization of twelve polymorphic microsatellite loci in the buff-throated partridge (Tetraophasis szechenyii), Russian Journal of Genetics" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
TY - JOUR. T1 - Kanniadu goats of Tamilnadu, India. T2 - genetic characterisation through microsatellite markers. AU - Thilagam, K. AU - Jayaraj, Rama. AU - Sivaselvam, S N. AU - Karthickeyan, S M. AU - Thangaraju, P. PY - 2006. Y1 - 2006. N2 - Characterisation of Kanniadu goats was done using microsatellite markers. The genomic DNA from 50 unrelated Kanniadu goats were PCR-amplified with a panel of 20 microsatellite markers and resolved through 6 per cent denaturing polyacrylamide gel electrophoresis followed by silver staining.The number of alleles ranged from 5 to 14 with allele sizes ranging from 90 to 222bp. The allele frequencies ranged from 0.0106 to 0.4480. Polymorphism information content ranged from 0.5710 to 0.8570. Except four loci, thepopulation was not in Hardy-Weinberg equilibrium. The observed heterozygosity ranged from 0.7142 to 0.9778 while the expected heterozygosity ranged from 0. 6390 to 0.8702, indicating the heterogenous nature of the population distributed in the breeding ...
Genetic diversity and relationships among 38 Iranian durum wheat accessions were analysed using conserved DNA-derived polymorphism (CDDP) and start codon targeted (SCoT) markers. A total of 10 CDDP and 10 SCoT primers were used to estimate genetic polymorphism among 38 durum wheat accessions. Comparatively, both CDDP and SCoT markers proved to be more effective and in terms of percentage of polymorphisms and polymorphic information content value were relatively similar. The average polymorphic information content value of CDDP was 0.39 which was relatively higher than those of SCoT where the respective values of polymorphic information content was 0.35. Using the neighbor joining clustering method, CDDP and SCoT markers were used to generate dendrograms, which revealed that the durum accessions were clustered into three and two major groups, respectively. According to the present results, CDDP markers proved more informative in studying genetic diversity among durum accessions. In both marker ...
Xiao Bingbing, Han Lingxia, Niu Chengming, Si Changde and Han Jianlin. 2010. Population genetic variation in BWEL-SPF chickens inferred from microsatellite DNA markers. China Animal Husbandry and Veterinary Medicine 37(9):106-111 ...
BEHEREGARAY, L. B., SCHWARTZ, T. S., MÖLLER, L. M., CALL, D., CHAO, N. L. and CACCONE, A. (2004), A set of microsatellite DNA markers for the one-lined pencilfish Nannostomus unifasciatus, an Amazonian flooded forest fish. Molecular Ecology Notes, 4: 333-335. doi: 10.1111/j.1471-8286.2004.00687.x ...
Hybridization and/or incomplete sorting of ancestral polymorphism are commonly implicated to explain discordant phylogenetic analyses of closely related species complexes. One genus in which these phenomena have been suggested to have played major roles based on phylogenetic data is Conradina, a genus of mints (Lamiaceae) endemic to the southeastern USA containing several endangered species. The goals of this study were to use microsatellite data to better understand patterns of genetic structure in Conradina, to test hypotheses of recent or ancient hybridization and incomplete lineage sorting, and to clarify species boundaries. Individuals from 55 populations representing all Conradina species were genotyped using 10 microsatellite loci. Analyses of the patterns of genetic structure in Conradina revealed a clear differentiation of populations following recognized species boundaries, indicating that species have diverged from one another genetically and interspecific hybridization has not ...
Alterations at microsatellite DNA markers in cells exfoliated in urine have been correlated to the presence of bladder cancer. To check the feasibility of such noninvasive analysis to routinely diagnose bladder cancers, we have developed a highly sensitive method using fluorescent PCR to search for DNA microsatellite alterations in urine sediment compared with a blood paired sample. One hundred eighty-three patients were included in our study. This population comprised 103 bladder cancers (64 pTa stages), the complement representing controls and other benign or malignant diseases. Results of the analysis at 17 loci in a blinded study were compared with cystoscopy and/or pathology. The high reproducibility of this technique and the analysis of 26 control patients allowed us to determine for each microsatellite a cutoff characterizing a significant allelic imbalance. For bladder cancer detection, the overall sensitivity of the test was 84%. Using this procedure, we identified alterations in 81%, ...
In order to identify polymorphic microsatellite markers and evaluae genetic variation within Baluchi sheep population, nineteen microsatellite loci were studied. Whole Blood samples were collected from 156 sheep at north eastern animal breeding station of Iran (Abbasabad-Mashhad). DNA was extracted by salting-out procedure with some modifications. Polymerase chain reactions were ...
Dec 21, 2009. From 7-18 December 2009, the project RER/5/015 Supporting Early Warning and Surveillance of Avian Influenza Infection in Wild and Domestic Birds and Assessing Genetic Markers for Bird Resistance, held a Regional Training Course on Genomic DNA Preparation, Microsatellite Analyses and Sequencing, at the IAEA and FAO Agriculture and Biotechnology Laboratory in Seibersdorf, Austria.. This IAEA Technical Cooperation Programme in Europe initiated a new regional programme to establish early bird-flu diagnosis and assessment of genetic markers for Avian Influenza reistsance with nuclear molecular methods in the region to prevent spread of Avian Influenza for better animal health and economic benefits.. The purpose of the training course was to enhance knowledge on highly pathogenic avian influenza (advanced molecular genetic tools by use of nuclear and nuclear related and molecular technologies), in genomic DNA preparation, microsatellite analyses and sequencing, with the ultimate goal to ...
To facilitate large-scale genetic mapping of the human genome, we have developed chromosome-specific sets of microsatellite marker loci suitable for use with a fluorescence-based automated DNA fragment analyser. We present 254 dinucleotide repeat marker loci (80% from the Genethon genetic linkage map) arranged into 39 sets, covering all 22 autosomes and the X chromosome. The average distance between adjacent markers is 13 centiMorgans, and less than 4% of the genome lies more than 20 cM from the nearest marker. Each set of microsatellites consists of up to nine marker loci, with allele size ranges that do not overlap. We selected marker loci on the basis of their reliability in the polymerase chain reaction, polymorphism content, map position and the accuracy with which alleles can be scored automatically by the Genotyper(TM) program ...
Laboratory and field protocols, and scripts used in the LEGAL laboratory.. For scripts check out our GitHub repository.. For PDF versions of protocols also check out our GitHub repository.. ...
Comparing different methods of estimating the genetic diversity could define their usefulness in plant breeding programs. In this study, a total of 18 morphological traits and 20 simple sequence repeat (SSR) loci were used to study the morphological and genetic diversity among 20 maize hybrids selected from different countries, and to classify the hybrids into groups based on molecular profiles and morphological traits. To collect morphological data, a field experiment was carried out using an RBCD design with three replications in Moghan, Ardabil, Iran. The highest estimates for genetic coefficients of variation were observed in anthesis-silking interval, followed by grain yields, leaf chlorophyll rates, kernel row numbers, and ear heights. The total number of PCR-amplified products was 84 bands, all of which were polymorphic. Among the studied primers,NC009,BNLG1108,BNLG1194,PHI026 and PHI057 showed the maximum polymorphism information content(PIC) and the greatest diversity. To determine the genetic
AIMS: To detect microsatellite abnormalities in the primary tumours and plasma of patients with breast carcinoma. METHODS: Plasma was obtained from 17 breast carcinoma patients before surgery. Corresponding tumour and benign lymph node (control) samples for each of the carcinoma patients were obtained from paraffin blocks. DNA was extracted from the plasma samples and the paraffin embedded tissue using previously described methods. RESULTS: The 17 primary tumours showed two examples of loss of heterozygosity and three examples of microsatellite instability; the 17 plasma samples showed three and one, respectively. Many of the longer microsatellites (over 200 base pairs) were difficult to amplify from plasma. The investigations suggested that this was because of the highly fragmented nature of plasma DNA. Only one example of loss of heterozygosity and one example of microsatellite instability showed a concordant pattern in both primary tumour and plasma. These were both in the same patient. ...
In total, 41 different microsatellite variants have been typed in one or more of four different sets of recombinant inbred (RI) mouse strains. Microsatellite variants were selected that were located in chromosomal regions previously lacking markers. These markers extend the regions swept in these RI strains.
Hi bionetters I am doing research on the occurrence and polymorphism of microsatellites in co nifers. I havent found a lot of polymorphisms in GT/CA repeats or CT/GA. Howev er, I have an AT/AT microsatellite that shows a high rate of variability. There are a few problems with it though. 1) I originally isolated it as a CA-repeat that was followed by a stretch of TA s. I amplified it from the genomic DNA and found that all the products I obtain ed are shorter than the original. Then I cloned the PCR amplified fragments and sequenced them. To my surprise, the CA/GT microsatellite was not present. What was left was a stretch of TAs. Am I amplifying a microsatellite family and is the CA/GT + TA member that I cloned only a minority???? I am not so sure since I havent obtained more than 2 alleles from a single tree up to now. 2) When I PCR the plasmids containing the different AT stretches, I obtain two or more distinct bands as a result. Instability of the TA repeat in the plasmid /bacterial host ...
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Genomic copy number changes are frequently found in cancers and they have been demonstrated to contribute to carcinogenesis; and it is widely accepted that tumors with microsatellite instability (MSI) are genetically stable and mostly diploid. In the present study we compared the copy number alterations and the gene-expression profiles of microsatellite stable (MSS) and MSI colorectal tumors. A total number of 31 fresh-frozen primary tumors (16 MSS and 15 MSI) were used. Twenty-eight samples (15 MSS and 13 MSI) were analyzed with metaphase comparative genomic hybridization (CGH), nine of which plus one additional sample (4 MSS and 6 MSI) were further analyzed by cDNA-based array-CGH. Gene expression analysis was performed with six samples [3 MSS and 3 MSI, four of these used in metaphase CGH (mCGH) analysis] to identify differentially expressed genes possibly located in the lost or amplified regions found by CGH, stressing the biological significance of copy number changes. Metaphase and ...
OBJECTIVE: To compare the potential of two diagnostic methods for detecting recurrence of urothelial cell carcinoma (UCC) of the bladder, by (i) detecting alterations in microsatellite DNA markers and loss of heterozygosity (LOH), and (ii) detecting aberrant gene hypermethylation, as UCC has a high recurrence rate in the urinary tract and the disease can invade muscle if new tumours are overlooked. PATIENTS AND METHODS: Over 1 year, urine samples were retrieved from 40 patients already diagnosed with bladder UCC (30 pTa, two pTis, eight pT1). Samples were collected 6 months after bladder tumour resection, during the follow-up schedule. We used samples to analyse nine microsatellite markers and the methylation status of 11 gene promoters. Receiver operating characteristic curves were generated and Bayesian statistics used to create an interaction network between recurrence and the biomarkers. RESULTS: During the study, 15 of the 40 patients (38%) had a tumour recurrence and 14 were identified by
Profound MSI is a hallmark of hereditary nonpolyposis colon carcinoma (HNPCC) and is also found in a proportion of sporadic HNPCC-spectrum tumors, such as endometrial carcinoma.21 The underlying cause of MSI is a defect in mismatch repair, which results in tumorigenesis through an accumulation of somatic mutations in genes important for regulating cell cycle, growth, or apoptosis. A lower level of MSI occurs in tumors that are outside the HNPCC spectrum. Previous studies of endothelial cells microdissected from plexiform lesions of PAH lungs have shown monoclonal expansion in 17 of 22 lesions (77%) from 4 patients and microsatellite mutation rates ranging from 21% for BAX to 50% for BAT26.13,15 This suggested that endothelial cell expansion in plexiform lesions is akin to neoplasia and might result from an accumulation of somatic mutations, either through MSI or other mutational mechanisms. We have now conducted similar analyses in a series of FPAH cases in whom BMPR2 has been fully ...
A total of 83 prostate adenocarcinomas was evaluated for allelic loss on chromosome 10 by analysis of loss of polymorphic microsatellite repeats. Initially, 64 stage B carcinomas were analyzed at 12 loci on chromosome 10. Nine cases showed loss of chromosome 10 sequences, with a fractional allelic loss of 20%. These nine cases were then analyzed at an additional 19 loci to define better the regions of loss. Four areas of loss were identified, including 10p (2 of 64 cases), 10q23.1 (7 of 64 cases), 10q23.3 (4 of 64 cases), and 10q26 (2 of 64 cases). Three loci in these regions, D10S111, D10S185, and D10S192, were then analyzed in 19 advanced (stage C and D) carcinomas. Seven (37%) of 19 advanced carcinomas showed allelic loss at one or more of these loci. A statistically significant increase in the fractional allelic loss at both D10S111 (10p) and D10S185 (10q23.1) was observed. Thus, a complex pattern of loss is seen on chromosome 10 in prostate carcinoma, with regions of loss on 10p and 10q, ...
Knowledge of genetic diversity and of the genetic relationships among elite breeding materials has had a significant impact on the improvement of crops. In maize, this information is particularly useful in i) planning crosses for hybrid and line development, ii) in assigning lines to heterotic groups and iii) in plant variety protection. We have used the SSR technique to study the genetic diversity and genetic relationships among 76 Korean waxy corn accessions, representing a diverse collection from throughout Korea. Assessment of genetic diversity among members of this group was conducted using 30 microsatellite markers. Among these 30 microsatellite markers, we identified a total of 127 alleles (with an average of 4.2 and a range of between 2 and 9 alleles per locus). Gene diversity at these 30 microsatellite loci varied from 0.125 to 0.795 with an average of 0.507. The cluster tree generated with the described microsatellite markers recognized two major groups with 36.5% genetic similarity. ...
A set of 13 simple sequence repeat markers was developed from D. trimaculatus genomic DNA, tested for D. auripinnis and characterized using 40 individuals per species. All the loci were polymorphic with a number of alleles ranging from three to 30. Observed heterozygosities varied from 0.23 to 0.89 for D. trimaculatus and from 0.11 to 0.85 for D. auripinnis. Early results show that these will be powerful markers for the study of ecological and evolutionary mechanism in this coral reef fish species complex ...
and thus are genetically linked. The primers used to generate polymorphic bands were 3-anchored inter-simple sequence repeat primers which identified genomic microsatellites with a repeated motif of 3 nucleotides in length. The primers were used singly to amplify genomic segments which were flanked by inversely orientated, closely spaced, identical microsatellite sequences. One of the polymorphic bands, a 900 base pair band, was completely linked to the Sr39 and Lr35 rust resistance genes in the segregating population used in this study. After cloning and sequencing this polymorphic band, the inter-simple sequence repeat marker was converted to a sequence characterized amplified region marker by designing primer sets which amplify a single, easily resolved band from DNA of plants with Sr39/Lr35 genes. This marker is present in six wheat lines carrying the Sr39 and Lr35 genes on the translocated chromosome segment from Ae. speltoides, The marker has facilitated efforts to breed Canada Prairie ...
Citation: Kottapalli, K., Burow, M., Burow, G.B., Burke, J.J., Puppala, N. 2007. Molecular characterization of the US peanut mini core collection using microsatellite markers. Crop Science. 47(4):1718-1727. Interpretive Summary: Peanut is the second-most important legume crop in the United States. A limitation to increased peanut productivity is that peanut improvement is hampered by relatively low genetic variability in the germplasm commonly used by breeding programs. To facilitate accessibility to diverse germplasm sources for breeding applications, a core subset of the United States Department of Agriculture (USDA) peanut germplasm was previously established that later on was refined to develop a mini core collection consisting of 112 accessions. In this study we determined the genetic diversity of the US peanut minicore collection at the molecular level using microsatellites or simple sequence repeat markers. Microsatellites are well known for their potentially high information content and ...
The recent establishment of the round goby (Neogobius melanostomus), an invasive fish in Lake Michigan, provides a unique opportunity to view fine scale evolutionary processes, such as gene flow, that can create genetic structure within a population. We captured 1,388 round gobies by angling and minnow traps from 12 sites that span the entire shoreline of Lake Michigan. The number of round gobies captured at a site ranged from 20 to 451 individuals. Caudal fin clips were collected from 20-52 fish at each site for genetic analysis. Additionally, total length, weight, and sex were recorded from 20-74 fish from each site. Significant differences were found between pairwise comparisons of mean weight and catch per unit effort at each site. We are currently extracting genomic DNA from round goby tissue samples and eight nuclear microsatellite loci are being amplified by polymerase chain reaction. We will use this genetic data to determine whether: 1) there are significant patterns of genetic ...
Using microsatellite data of human populations, this study showed that DA distance is the most efficient in obtaining a correct branching pattern, followed by FST*, FST′, and DS, and that (δμ)2 has much lower efficiency than the other distance measures. This result is consistent with the previous computer simulation study, although efficiency of FST′ was not examined (Takezaki and Nei 1996). DA, DS, FST*, and FST′ were originally developed for classical genetic markers that the IAM can apply. Mean values for these distance measures approximately increase linearly with time after separation of the two populations for a small 2vt value (expected number of mutations) even under the SMM, but the rate of the increase slows down for large 2vt values. Theoretically, (δμ)2 is expected to be proportional to mutation rate under the SMM. However, (δμ)2 has a much larger sampling error than the other distance measures. As far as the data examined in this study are concerned, the extent of ...
AUG 2014 ARTICLE LIST || PharmaTutor (August- 2014) ISSN: 2347 - 7881 (Volume 2, Issue 8) Received On: 16/04/2014; Accepted On: 29/05/2014; Published On: 01/08/2014 AUTHORS: Shikha Jain*, Ranjana Joshi, Kirti Jatwa, Avnish Sharma, S.C. Mahajan Department of Pharmaceutics, Mahakal Institite of Pharmaceutical Studies, Behind Air strip, Datana, Dewas Road, Ujjain, M.P.
Tumour infiltrating lymphocytes have been associated to a better prognosis in colorectal cancers. Microsatellite unstable tumours present a greater infiltration by these ..
Free download of Molecular Genetics Information System 1.0. This project is aimed at developing an open source information system for an efficient management of data deriving from Sanger sequencing and microsatellite genotyping experiments. Molecular Genetics Information System 1.0 License - GNU General
|.. ۞ These murine CCAs bear histologic and genetic features of human intrahepatic CCA inducible nitric oxide synthase of uvomorulin (prosta-glandin-endo-peroxide synthase 2, NCAM; 116930) to COX-2, (Cyclo-oxygenase-2) and cyclo-oxygenase-2 [?] ۞ expression PTGS2. This mechanism restrained both oxidant stress and platelet G0 phase activation. Mice lacking Cox2 (Ptgs2, allergen-induced by dexamethasone or anti-Ifng (Interferon)…
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MolabIS 1.0.2 :: DESCRIPTION MolabIS (molecular labs information management system)is designed for small-to-medium sized labs conducting Sanger sequencing and microsatellite genotyping to store and efficiently hand
LOH and microsatellite alterations were observed in biopsy specimens from both current and former smokers, but no statistically significant differences were observed between the two groups. Among individuals with a history of smoking, 86% demonstrated LOH in one or more biopsy specimens, and 24% showed LOH in all biopsy specimens. About half of the histologically normal specimens from smokers showed LOH, but the frequency of LOH and the severity of histologic change did not correspond until the carcinoma in situ stage. A subset of biopsy specimens from smokers that exhibited either normal or preneoplastic histology showed LOH at multiple chromosomal sites, a phenomenon frequently observed in carcinoma in situ and invasive cancer. LOH on chromosomes 3p and 9p was more frequent than LOH on chromosomes 5q, 17p (17p13; TP53 gene), and 13q (13q14; retinoblastoma gene). Microsatellite alterations were detected in 64% of the smokers. No genetic alterations were detected in nonsmokers. Conclusions: ...
MSH6, 0.5 ml. An alteration of microsatellite repeats is the result of slippage owing to strand misalignment during DNA replication and is referred to as microsatellite instability (MSI).
In the present study, we identified tumor specific AS of SLC39A14. The ratio (4A/4B) between the two mutually exclusive exons 4A and 4B was shown to be significantly higher in normal mucosa samples than in adenoma and cancer samples, regardless of adenoma type, microsatellite status, and cancer stage. In three different Wnt-pathway model systems and in two independent colorectal cancer cell lines, we have shown that the 4A/4B ratio is altered when Wnt signaling is abrogated. In addition, the same tumor specific AS pattern can be seen in gastric and lung cancer, where the Wnt pathway has been reported to be activated (4, 5). We have shown that a likely mechanism for regulating the AS of SLC39A14 is Wnt-signaling mediated up-regulation of SRPK1 in tumor samples and that knockdown of SRPK1 leads to an altered 4A/4B ratio. When the SRPK1 substrate SFSR1 is knocked down, the splicing pattern of SLC39A14 is also altered indicating that SRSF1 binds to SLC39A14 and regulate the AS of 4A/4B.. Previously, ...
Genetic differentiation among the spatial and temporal samples was investigated using analysis of molecular variance (AMOVA)[40, 41] and by estimating pairwise FST values between samples using Arlequin. For the two regions with the largest sample sizes (Haukivesi and Pihlajavesi), we also ran a hierarchical AMOVA with spatial samples subdivided into temporal subsamples, and vice versa. Significance levels were estimated on the basis of 10,000 permutations. Because FST is influenced by the level of heterozygosity (HS) in the studied subpopulations[42-44], we used GenAlEx v. 6.501[45, 46] to estimate overall spatial differentiation also based on Dest[42] and G"ST[44], which correct for genetic diversity as well as the number of subpopulations in the analysis; departures from zero were inferred based on 999 permuted datasets. To facilitate comparisons between the microsatellite and mtDNA datasets (see[47]), we estimated global Dest also for the mtDNA sequence data using a script[48] employing the ...
We studied MSI in 205 tumours from 152 patients with HNPCC. Of these, 37 patients fulfilled the Amsterdam criteria, 72 patients were familial and 43 were sporadic cases. We used the method of fragmentation analysis (ABI Prism 310 Genetic Analyzer) with fluorescent labelled primers; three mononucleotide (BAT-RII, BAT-25, BAT-26) and five dinucleotide (D2S123, D3S1029, D5S346, D17S250, D18S58) repeat loci were analysed. We detected 75 tumours with a high degree of MSI (MSI-H), 12 tumours with a low degree of MSI (MSI-L) and 118 tumours with stable microsatellites (MSS). We found a loss of heterozygozity (LOH) in 44 MSS tumours. In 30 patients with MSI-H tumours mutation in one of mismatch repair genes was detected ...