1. Feedstocks Division, Joint BioEnergy Institute, Emeryville, California 94608, United States
2. Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
3. Life-cycle, Economics, and Agronomy Division, Joint BioEnergy Institute, Emeryville, California 94608, United States
4. Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
5. Forage Genetics International, West Salem, Wisconsin 54669, United States
6. Technology Division, Joint BioEnergy Institute, Emeryville, California 94608, United States
7. Department of Plant Sciences, University of California-Davis, Davis, California 95616, United States
8. Department of Plant and Microbial Biology, University of California-Berkeley, Berkeley, California 94720, United States
9. Energy Analysis and Environmental Impacts Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
10. Energy and Biosciences Institute, University of California-Berkeley, Berkeley, California 94720, United States