Italy vote: Pier Luigi Bersani wins centre-left poll
Pier Luigi Bersani has won the race to be the centre-left candidate for Italian PM in next year's general election, according to partial results.
The veteran Democratic Party leader was in a run-off with Florence Mayor Matteo Renzi, 37, to retain his post.
With the party leading opinion polls, Mr Bersani has a good chance of becoming head of government after polls scheduled for early 2013, analysts say.
Those polls will choose successors to the current technocrat administration.
Prime Minister Mario Monti's successor will face the challenge of addressing Italy's deep-rooted economic problems.
Mr Bersani won the first round on 25 November, with 45% of the vote to Mr Renzi's 35.5%. Partial results on Sunday saw him polling more than 60%.
Mr Renzi tweeted that "it was right to try" and later congratulated his rival at a rally in Florence.
"They won and we did not," he said.
In his victory speech, Mr Bersani said job creation would be a priority as he put together a programme of policies for the electorate.
He would ensure there was room for younger members of the party to express themselves as they prepared for the challenges ahead, he added.
The BBC's Alan Johnston in Rome says the two men are very different characters, with tieless, youthful Mr Renzi painting himself as the voice of a new generation which wants to sweep away the entire class of older politicians.
By contrast, adds our correspondent, 61-year-old Mr Bersani has argued that experience is what the country needs.
Speculation has been mounting as to whether centre-right leader Silvio Berlusconi would run for a fourth term in office next year, with the former prime minister suggesting last week that he was thinking about returning to politics.
The billionaire tycoon's record has been tarnished by sex and political scandals, and he resigned as prime minister in November 2011, after MPs approved an austerity deal to help curb the debt crisis threatening the eurozone.