1. Department of Plant Science, University of Tennessee, Knoxville, Tennessee 37996 (Y.P., T.L., M.N.-R., C.N.S.);
2. Department of Biology, Indiana University, Bloomington, Indiana 47405 (Z.L., L.H.R.);
3. Department of Plant Sciences (M.O., M.J.) and
4. Genome Center (H.O., R.W.K.), University of California, Davis, California 95616;
5. Monsanto, Inc., St. Louis, Missouri 63130 (R.D.S.); and
6. Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z4 (L.H.R.)