Rio de Janeiro, Sep 10 (DPA) The Group of 20 (G20) developing nations opened a meeting in the Brazilian city of Rio de Janeiro to discuss the World Trade Organisation's (WTO) Doha Round of talks aimed at lowering trade barriers around the world.

The group, which is made up of countries who rely heavily on agricultural exports and is led by Brazil, India and South Africa, is meeting for the first time since the WTO talks were suspended in July.

After the breakdown of talks in Geneva on July 31, the EU blamed the US for refusing deeper cuts in farm supports.

The US said it would not roll back farm subsidies to pre-Depression era levels without better market access to Europe and to fast-growing economies like China, India and Brazil.

"A disruption in the Doha Round would indicate a disruption of the development process for all of us," Indian Commerce Minister Kamal Nath said.

In a joint statement issued Saturday, the G20 warned that they would not tolerate any back-pedalling on agreements already reached in the Doha Round.

Developing countries are reticent to accept further trade liberalisation in their own countries before the subsidies, which they feel give industrialised nations an unfair trade advantage, are eliminated.

The meeting in Rio de Janeiro is expected to be attended by the trade ministers of 15 of the 21 countries in the G20.