Modeltest A tool to select the best-fit model of nucleotide substitution
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Modeltest Tags

URL substitution selection text substitution substitution nucleotide proportion TRichView substitution Substitution Cipher shift-substitution ciphers nucleotide sequence nucleotide sequence manager nucleotide partial substitution drive substitution monoalphabetic substitution nucleotide substitution model nucleotide motif complex substitution model nucleotide substitution model selection framework hierarchical likelihood nucleotide annotation DNA substitution model nucleotide alignments substitution DNA model Synonymous Substitution Nonsynonymous Substitution substitution model nucleotide polymorphisms nucleotide mutation nucleotide fraction

Modeltest Description

Modeltest is an advanced and reliable piece of software developed to serve genetics engineers in determining the differences between DNA substitution models using hierarchical hypothesis testing in order to generate the results. Command line interface The application is fairly complex, as it is meant for experienced users with a solid background knowledge in genetics as well as computers, specifically since it does not provide users with a GUI, running only through the command line interface, which can make it fairly challenging for novices. Nonetheless, Modeltest does not require installation, so it suffices for users to just drop the executable file onto an open instance of Command Prompt and press the Enter key, which in turn will reveal the program's functions along with a brief explanation of the available commands. Functions and running parameters Modeltest is meant to work with files generated by PAUP* which contain the genetics information required, as well as files which comprise raw log scores along with parameter estimates for the assessed models. On the opposite end, the utility generates a description of the probability ratio tests that were conducted, and their corresponding P-values, information which is then interpreted and assigned a proper model. The supported models are listed in the command line interface, including JC (Jukes and Cantor), TrNef (Tamura-Nei with equal base frequencies), TIM (Transitional Model), GTR (General Time Reversible), F81 (Felsenstein) and several more. At the same time, users can work with a specific set of functions, exemplified in the main window in order to make them easier to understand and employ. As such, users can determine the debug level ( -d), the alpha level (-a), the number of taxa (-t), activate the LRT calculator mode (-l), determine confidence interval for averaging (-w) or use BIC rather than AIC for all future operations (-b). A comprehensive instrument for determining the proper substitution model To conclude, Modeltest is an efficient application developed for professionals working in the field of genetics, offering them the means of comparing DNA substitution models, thus helping users decide on which best fits their data.

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