1. Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, Iowa, USA.
2. Interdepartmental Genetics Program, Iowa State University, Ames, Iowa, USA.
3. Department of Biomedical Sciences, Iowa State University, Ames, Iowa, USA.
4. Bioinformatics and Computational Biology Program, Iowa State University, Ames, Iowa, USA.