Infrastructure and Transport Minister Darren Chester has been dumped from Federal Cabinet in the ministerial reshuffle.

Key points: Joyce to take over infrastructure, transport from Chester

Joyce to take over infrastructure, transport from Chester David Littleproud looks to be on the move, possibly straight into Cabinet as agriculture minister

David Littleproud looks to be on the move, possibly straight into Cabinet as agriculture minister Reshuffle may be announced today

And in a surprise move, Nationals backbencher David Littleproud looks set to go straight into Cabinet, potentially as agriculture minister.

Deputy Prime Minister Barnaby Joyce will take over the infrastructure and transport portfolios when Prime Minister Malcolm Turnbull announces the changes.

Mr Joyce is Agriculture Minister but has been eyeing off the infrastructure job for months.

The move will give him control of the Federal Government's multi-billion-dollar inland rail project.

Mr Chester loses the Cabinet position he has held since early last year.

He has been a strong supporter of same-sex marriage and pushed for more women to take on senior positions in the party.

He recently supported fellow Victorian, Nationals senator Bridget McKenzie's successful bid for the party's deputy leadership.

Queensland Nationals were upset when the deputy leader's job went to a Victorian.

National Farmers' Federation chief executive Tony Mahar would not speculate on likely candidates to replace Mr Joyce as agriculture minister, but said the reshuffle was "pretty bloody important".

"Looking forward, if we're going to be a $100 billion industry, it's got to be somebody that has the capacity and the willingness to go into bat on all of these issues that we know are going to allow us to take that next step," he said.

Prime Minister Malcolm Turnbull will be likely to promote Queenslanders to cover the vacancy created by Attorney-General George Brandis's departure.

New Nationals deputy leader Bridget McKenzie will be catapulted from the backbench into Cabinet and has been heavily involved in senate inquiries into agriculture issues in the past.

Senator McKenzie's promotion meant there were three Victorian Nationals in senior positions — which angered some Queenslanders in the party.

The Nationals lost a seat in Parliament when Ms Nash was disqualified by the High Court, but the party is confident it will retain five cabinet spots in the reshuffle.

Social Services Minister Christian Porter is tipped to become the attorney-general and regional Liberal Dan Tehan looks set to be promoted to Cabinet.