RT Journal A1 Aylor, David L. A1 Valdar, William A1 Foulds-Mathes, Wendy A1 Buus, Ryan J. A1 Verdugo, Ricardo A. A1 Baric, Ralph S. A1 Ferris, Martin T. A1 Frelinger, Jeff A. A1 Heise, Mark A1 Frieman, Matt B. A1 Gralinski, Lisa E. A1 Bell, Timothy A. A1 Didion, John D. A1 Hua, Kunjie A1 Nehrenberg, Derrick L. A1 Powell, Christine L. A1 Steigerwalt, Jill A1 Xie, Yuying A1 Kelada, Samir N.P. A1 Collins, Francis S. A1 Yang, Ivana V. A1 Schwartz, David A. A1 Branstetter, Lisa A. A1 Chesler, Elissa J. A1 Miller, Darla R. A1 Spence, Jason A1 Liu, Eric Yi A1 McMillan, Leonard A1 Sarkar, Abhishek A1 Wang, Jeremy A1 Wang, Wei A1 Zhang, Qi A1 Broman, Karl W. A1 Korstanje, Ron A1 Durrant, Caroline A1 Mott, Richard A1 Iraqi, Fuad A. A1 Pomp, Daniel A1 Threadgill, David A1 Pardo-Manuel de Villena, Fernando A1 Churchill, Gary A. T1 Genetic analysis of complex traits in the emerging Collaborative Cross JF Genome Research JO Genome Research YR 2011 FD August 01 VO 21 IS 8 SP 1213 OP 1222 DO 10.1101/gr.111310.110 UL http://genome.cshlp.org/content/21/8/1213.abstract AB The Collaborative Cross (CC) is a mouse recombinant inbred strain panel that is being developed as a resource for mammalian systems genetics. Here we describe an experiment that uses partially inbred CC lines to evaluate the genetic properties and utility of this emerging resource. Genome-wide analysis of the incipient strains reveals high genetic diversity, balanced allele frequencies, and dense, evenly distributed recombination sites—all ideal qualities for a systems genetics resource. We map discrete, complex, and biomolecular traits and contrast two quantitative trait locus (QTL) mapping approaches. Analysis based on inferred haplotypes improves power, reduces false discovery, and provides information to identify and prioritize candidate genes that is unique to multifounder crosses like the CC. The number of expression QTLs discovered here exceeds all previous efforts at eQTL mapping in mice, and we map local eQTL at 1-Mb resolution. We demonstrate that the genetic diversity of the CC, which derives from random mixing of eight founder strains, results in high phenotypic diversity and enhances our ability to map causative loci underlying complex disease-related traits.