(For other news from the Reuters Latin American Investment Summit, click on http://www.reuters.com/summit/LatinAmericanInvestment11?pid=500)
WASHINGTON, March 30 (Reuters) - The chance of reaching a deal this year in long-running world trade talks could slip away unless major emerging economies like Brazil muster the political courage to open their markets, the top U.S. trade official said on Wednesday.
"I think it is very much in question whether there is a willingness to engage, to move toward a middle ground that allows us to go forward" in the Doha round, U.S. Trade Representative Ron Kirk said at the Reuters Latin American Summit.
(Reporting by Doug Palmer; editing by Jackie Frank)