Plant & Animal Genomes XVII Conference Plant & Animal Genomes XVII ConferenceJanuary 10-14, 2009
Town & Country Convention Center
San Diego, CA
PROC QTL is a user defined SAS procedure for mapping quantitative trait loci (QTL). Since this procedure is not a built-in SAS procedure, users need to obtain a copy of the executable file of PROC QTL and install the software in their personal computers before PROC QTL can be executed. Of course, users need a regular SAS license prior to the installation of PROC QTL. Once PROC QTL is installed, users can call the procedure just like they call any other regular SAS procedures without noticing the differences between this customized one and any built-in SAS procedure. PROC QTL is different from other stand alone QTL mapping software packages, such as QTL Cartographer, in that it interfaces with the SAS system to perform all the QTL analysis. The SAS system provides services to the procedure such as statement processing, data set management and memory allocation. It behaves like a parasite of SAS but presents no harm to the SAS system and your computers. PROC QTL can read SAS data sets and data views, perform data analysis, print results, and create other SAS data sets. The current version of PROC QTL has incorporated the following procedures of QTL mapping: maximum likelihood (ML), least squares (LS), iteratively reweighted least squares (IRLS), Fisher scoring (FISHER) and Bayesian method (BAYES). The Bayesian method is particularly designed to map multiple quantitative trait loci.