Federal Nationals Leader Warren Truss has exposed the split in the Coalition over the future of wheat marketing, indicating his party will vote against Labor's changes, which the Liberals are likely to support.
Labor Agriculture Minister Tony Burke this week introduced legislation that would dismantle the single desk and open the way for multiple companies to be licenced to export week.
The Liberals have indicated they will support the legislation, after several amendments it proposed were adopted.
However, Mr Truss said The Nationals would oppose the Bill.
"The National Party's views on organised marketing in the wheat industry are well known and they've been a fundamental tenet of the party for many years," Mr Truss said this morning.
"We believe the single desk has served the industry well, it delivers the best returns to the growers and also the best results in maximising the returns to our country from our wheat sales.
"We've been a supporter of that concept in the past, we believe it serves the industry well and that continues to be our position."