TORONTO, April 11 (Reuters) - Canada's main stock index was slightly lower in early trade on Tuesday, while Bombardier Inc BBDb.TO rose on a Bloomberg report it and Siemens AG SIEGn.DE are in talks to combine their train operations.
The Toronto Stock Exchange's S&P/TSX composite index .GSPTSE was down 36.33 points, or 0.23 percent, at 15,694.46. Bombardier was up 4.1 percent at C$2.31.