The Obama administration’s trade complaint against China over support for its wind-energy manufacturers won backing from U.S. business groups. The case, filed at the World Trade Organization in Geneva, is the first by the U.S. over green technology after months of complaints about Chinese efforts to force manufacturers to make those products in the country. A government fund for wind manufacturers requires recipients to use domestically made parts, violating WTO rules, the U.S. Trade Representative’s office said in a statement announcing the case.