CHICAGO, May 12 (Reuters) - Chicago Board of Trade corn futures closed higher on Tuesday on spillover support from a sharp rally in wheat prices, traders said.

• CBOT and K.C. wheat futures climbed by their daily trading limits after the U.S. Department of Agriculture estimated the U.S. crop would be smaller than traders expected.

• Wheat and corn are both used for animal feed.

• USDA estimated U.S. corn production this year will decline to 15.995 billion bushels from a record 17.021 billion bushels last year. The forecast was above the average analyst estimate of 15.934 billion bushels.

• U.S. corn supplies were expected to remain ample at 1.957 billion bushels at the end of the 2026/27 season, down from 2.142 billion for 2025/26, according to USDA.

• China and the U.S. may reach a farm deal at their summit this week that expands Beijing's purchases of grains and meat, but market watchers said they did not expect major new soybean purchases beyond what was agreed in a deal last October.

• CBOT July corn CN26 ended 4-3/4 cents higher at $4.80 per bushel and set a one-week high.