Delegates left Rome without consensus on key issues such as the increased demand for crops to produce biofuels and the impact on worldfood prices, and there is also no agreement on the lifting of trade barriers and the issue of farm subsidies, officials said.
Mr Paterson dismissed concerns about human health, arguing that widespread use of GM crops around the world meant people were already unwittingly eating GM food.
And tonight, I ask the Congress to support an innovative proposal to provide food assistance by purchasing crops directly from farmers in the developing world, so we can build up local agriculture and help break the cycle of famine.
The US has consistently challenged through the World Trade Organisation the European Union's reluctance to import and sell genetically modified crops and food.