Italy coalition eyes alternatives to economy minister Tria

* Tria overruled by party bosses on fiscal deficit target

* Tria spokeswoman denies he plans to quit in January

* League deputy econ minister cited as possible replacement

* Investors sell bonds as budget tensions mount with Brussels

By Gavin Jones and Giuseppe Fonte

ROME, Oct 10 (Reuters) - When a senior representative of Italy's ruling coalition met international investors over dinner last week he was asked at the end of the evening if he had any questions. He only had one: "What would you do if Tria goes?"

The episode shines a light on the precarious position of Economy Minister Giovanni Tria, who looks weak and isolated after caving in to party chiefs by agreeing to raise next year's fiscal deficit far above levels agreed with Brussels.

Tria had committed to holding the deficit below 2 percent of gross domestic product but buckled under pressure from the coalition to set a target of 2.4 percent in what was seen as a humiliating defeat for the economics professor.

He is now in the middle of a power struggle between his paymasters from the right-wing League and the anti-establishment 5-Star Movement who need money to fulfil election pledges, and a European Union that is insisting on fiscal constraint.

Investors are nervous. Italian 30-year bond yields hit a four-year high on Tuesday above 4 percent on concerns talks between the coalition and Brussels could turn sour, with Tria, the face of economic moderation, side-lined.

"Tria is a good and competent person but I don't think he has yet fully understood his role," the coalition official said at the dinner, attended by a Reuters reporter, in an exclusive restaurant in Rome.

"He has tended to behave like the CEO of a private company who can act autonomously, but it's not like that, this is a political government, not a technocratic one," he said.

Tria's spokeswoman said she would not comment on remarks from unnamed people. She said the fact Tria had pushed for a lower deficit target than was finally agreed was part of a normal process of negotiation within governments everywhere.

However, the awkward relationship between Tria and party chiefs is likely to end within a few months, three political sources said, either because Tria walks or because he is pushed.

"Tria wants to go, and we are fed up with him, but nothing will happen before January because first we have to approve the budget in parliament," a second senior coalition source said.

Tria's spokeswoman said he had no plans to resign.

DIFFERENT OPTIONS

Officials from both the League and 5-Star have grumbled frequently in private that Tria, a 70-year-old academic who is not a member of either party, seems to have his own agenda.