* Soybeans supported by Chinese buying, Trump comments
* Wheat rebounds after five sessions of losses
* Technical selling pressures corn futures (Updates with start of U.S. trading, changes dateline from PARIS/SINGAPORE)
CHICAGO, Sept 26 (Reuters) - U.S. soybean futures rose on Thursday on hopes for further Chinese purchases, while technical selling pushed down corn futures.
China, the world's largest soybean importer, will buy about 6 million tonnes of soy from the United States before trade talks in early October, said a chief analyst at Shanghai JC Intelligence Co Ltd.
Purchases of U.S. agricultural products like soybeans, the biggest U.S. farm export in terms of dollar value, are seen as part of improving relations during the trade war between the United States and China.
The U.S. Department of Agriculture, through its daily reporting system, said private exporters sold 257,000 tonnes of U.S. soybeans to China for delivery in the 2019/20 marketing year that began on Sept. 1.
The USDA, in a separate weekly report, said total export sales of U.S. soybeans in the week to Sept. 19 were 1,038,000 tonnes, toward the high end of a range of trade expectations for 800,000 to 1.3 million tonnes. The total included 391,400 tonnes to China.
"Nobody really wants to add to short positions amid the purchases that China is making and reports of more purchases coming," said Arlan Suderman, chief commodities economist for INTL FCStone.
Most actively traded November soybean futures were up 0.5% at $8.89-3/4 a bushel at 11:10 a.m. CDT (1610 GMT) at the Chicago Board of Trade. The most-active corn contract was down 1.1% at $3.70 a bushel on technical selling, traders said.
CBOT wheat climbed 1.3% to $4.83-1/2 to break a run of five sessions of declines. K.C. hard red winter wheat futures traded higher and MGEX spring wheat declined as traders unwound spreads between the markets.
Profit-taking pressured MGEX December spring wheat after the market reached a two-month high on concerns about excessive rains hurting the crop's quality. The contract was down 1% at $5.48-3/4.
"You're going to see some profit-taking, consolidation until we get more fundamental data to support the move," Suderman said. (Reporting by Tom Polansek in Chicago Additional reporting by Gus Trompiz in Paris and Naveen Thukral in Singapore Editing by David Evans and Matthew Lewis)