High-density genetic mapping of a major QTL for resistance to multiple races of loose smut in a tetraploid wheat cross. oleh Sachin Kumar, Ron E Knox, Asheesh K Singh, Ron M DePauw, Heather L Campbell, Julio Isidro-Sanchez, Fran R Clarke, Curtis J Pozniak, Amidou N'Daye, Brad Meyer, Andrew Sharpe, Yuefeng Ruan, Richard D Cuthbert, Daryl Somers, George Fedak