SINGAPORE, Jan 12 (Reuters) - Chicago soybean futures edged higher on Tuesday as investors awaited the U.S. government's forecast of global grain and oilseed production due later in the day, with a focus on South American output.Corn lost ground, while wheat was unmoved.FUNDAMENTALS* The most-active soybean contract on the Chicago Board of Trade (CBOT) was up 0.1% to $13.73-1/4 a bushel, as of 0152 GMT. The market jumped to its highest since June 2014 at $13.88-3/4 a bushel on Monday.