The acronym QTL refers to Quantitative Trait Locus. A QTL is a chromosomal region suspected to contain a gene (or cluster of genes) that contributes to the variation observed at a quantitative trait. QTLs are detected through QTL mapping experiments. In crop plants, these experiments utilize experimental pedigrees, usually produced from crossing two inbred lines. A commonly used QTL mapping pedigree is the F2 pedigree.

The main differences between QTL and association mapping are: (1) the level of resolution (in terms of distance along the DNA or chromosome), and (2) the level of generality (in terms of the number of traits that can be studied with a given set of markers). (1) QTL analyses resolve the locations of genes (or gene clusters) influencing a trait down only to the level of chromosomal segments between one to 20 cM in size (roughly one million to 20 million base pairs). See similar questions...

Seizures beginning in the area of motor, sensory or language function are clinically mapped using stimulation mapping. Mapping is performed by stimulating the brain at low electrical current and mapping the appearance of a localized muscle jerk or loss of higher cortical function. This mapping can be performed intraoperatively (during surgery) with an awake patient or extraoperatively with sheets of grid electrodes. See similar questions...

Tone Mapping is the process of converting the tonal values of an image from a high range to a lower one. For instance, an HDR image with a dynamic range of 100,000:1 will be converted into an image with tonal values ranging from just 1 to 255. You may wonder why someone would want to reduce the tonal range when an HDR image provides so many benefits compared to a Low Dynamic Range image. After all, HDR images contain a much higher level of detail and are closer to the range of human vision. See similar questions...

Yes. The Animal QTLdb is open to public for data entry and update. One must apply to be a curator in order to do so. Being a curator, you will be able to have your public data populated to NCBI database automatically By submitting your data to the QTLdb, your data set will join the other QTL data set published in the past 10+ years, and subject to within and cross species comparisons. See paper by Hu et al. See similar questions...

Latest Answer: Dimension Mapping: In any star schema, we need to load all the Dimension tables first, because they ... Why do we need two connections for source? One is designer and another one is workflow manager? What... See similar questions...

It is quite possible that your doctor will not be familiar with the mapping techniques that are used to follow the progress of reversal. You should either map yourself or find a chiropractor, massage therapist, or physiotherapist willing to learn the procedure and take charge of your mapping. They already know what a normal muscle is supposed to feel like and will not have difficulty learning the simple process of mapping. See similar questions...

ANSWER: Community Mapping is the process by which community volunteers (Mappers) collect critical data about their community's beliefs, norms and practices related to adolescent reproductive health issues. This process begins with the careful selection and training of volunteers to conduct a door to door mapping and surveying process of different segments of the community. Community Mapping consist of the following parts: See similar questions...

in QTL mapping, the goal of association mapping is to find a statistical association between genetic markers and a quantitative trait. However, in association mapping, the genetic markers usually must lie within (or directly upstream or downstream of) candidate genes suspected to contribute to the variation in that trait, and the goal is to identify the actual genes affecting that trait, rather than just (relatively large) chromosomal segments. See similar questions...

Mind-Mapping was designed by the Director of PNA as a way focus our attention on the target markets of our featured speaker. It also helps us recognize those referral opportunities that present themselves in our daily lives that we may have otherwise missed if not for this exercise. more... See similar questions...

We cover the entire US territory (all 50 states and the Federal District of Columbia), including U.S. Possessions and Freely Associated States (Puerto Rico, U.S. Virgin Islands, American Samoa, Guam, Northern Mariana Islands, Palau, Federated States of Micronesia, Marshall Islands, Midway and other Minor Outlying Islands) See similar questions...

The combined data of the fuel mixture and ignition timing of "open loop" digital systems are held on a chip within your Electronic Control Unit (ECU). This data is then used by the ECU programme to set ignition and fuel supply to the engine as required. The data or "characteristics" of the information can be depicted, as a graph which when analysed and altered is known as engine mapping. See similar questions...

Paper maps that were first published over 50 years ago are no longer protected by copyright and can be freely copied, however, an appropriate 'acknowledgement to reproduce' must still be shown. See similar questions...

It is a process by which we can pinpoint the exact location of a business and use that to generate a list of businesses in a radius specified by the client. See similar questions...

Examples include Google Maps, Yahoo Maps, MapBlast, and MapQuest. NCTCOG has a free Internet mapping service located at www.dfwmaps.com that is tailored to North Central Texas. iCommunities is built off the same technology as www.dfwmaps.com, but the data are specific to the client and the application is customized to the client’s needs. See similar questions...

Following are extracted from each publication: Experimental design, Population structure and design, Testing Model and Methods, Trait names on which significant QTLs are detected, Trait Description and Measurements; QTL location (Chromosome, Position, 95% CI on the Location), Flanking markers (A1, A2, B1, B2 and the Peak; see Figure for # 3), Test Statistics (LOD_score, LS_means, P_values, F_values, Variance), QTL effects (Dominance effect, Additive effect), Candidate genes, etc. See similar questions...

we build up the QTLdb, we find that the utility of the QTLdb can extend beyond what we originally anticipated. Efforts are continually made to add more functionality to the utility of the QTLdb. See similar questions...

The QTLdb is based on linkage maps. Before we may add the cyto-genetic band alignments to the linkage maps within the QTLdb, users have to make that alignment with other tools, such as the Arkdb (http://www.thearkdb.org/anubis), i.e. translate your cytogenetic band locations into linkage map locations, and then come to use the QTLdb to look for QTLs. In the Arkdb, you wish to build a within-species comparative map between the "Cytogenetic" map and the "USDA-MARC_v.2" map on the same chromosome. See similar questions...