About the Authors

Michael V. Gonzalez

Affiliations Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, Washington, United States of America, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, United States of America

Michelle R. Mousel

Affiliation U.S. Sheep Experiment Station, Agricultural Research Service, U.S. Department of Agriculture, Dubois, Idaho, United States of America

David R. Herndon

Affiliation Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, Washington, United States of America

Yu Jiang

Affiliation CSIRO Animal, Food and Health Sciences, St. Lucia, Australia

Brian P. Dalrymple

Affiliation CSIRO Animal, Food and Health Sciences, St. Lucia, Australia

James O. Reynolds

Affiliation Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, Washington, United States of America

Wendell C. Johnson

Affiliation Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, Washington, United States of America

Lynn M. Herrmann-Hoesing

Affiliation Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, United States of America

Stephen N. White

Stephen.White@ars.usda.gov

Affiliations Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Pullman, Washington, United States of America, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, United States of America

Competing Interests

The authors have read the journal's policy and have the following conflicts: Michael V. Gonzalez received a Neal A. Jorgenson sheep genomics travel award to participate in the international Plant & Animal Genomes XXI conference in January 2013. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MVG MRM DRH YJ BPD LMH SNW. Performed the experiments: MVG MRM DRH JOR YJ. Analyzed the data: MVG MRM DRH YJ BPD WCJ SNW. Contributed reagents/materials/analysis tools: MVG MRM DRH YJ BPD JOR WCJ LMH SNW. Wrote the paper: MVG MRM DRH YJ BPD JOR WCJ LMH SNW.