* Euro zone recovery doubts add to Fed policy uncertainty
* World shares slide 1.0 pct, European shares 1.2 pct lower
* U.S. stocks signal weaker open on Wall St
* Euro falls under $1.32 to six week low
* Commodities join selloff, safe haven assets gain
By Richard Hubbard
LONDON, Feb 21 (Reuters) - Worries about Europe's economic health sent shares, commodities and the single currency lower on Thursday, extending losses caused by growing uncertainty over the U.S. Federal Reserve's future monetary policy.
The combination of factors put the MSCI world equity index on course for its biggest daily loss of the year, sent oil sliding towards $114 a barrel, and saw the dollar hit a three-month high against a basket of major currencies .
U.S. stock index futures pointed to a lower start on Wall Street when it reopens, with the S&P 500 index poised to follow its biggest daily fall in three months on Wednesday with more losses.
The latest bout of selling was triggered by surprisingly weak euro zone Purchasing Managers Index (PMI) data for February which dashed hopes of an early recovery for the recession-hit region.
Economists had expected the PMIs, a leading indicator of economic activity based on surveys of businesses, to add to other tentative signs of a recovery. But instead they pointed to a sizeable first-quarter contraction of up to 0.3 percent.
"The expectation was the trend of improvement for the euro zone as a whole would continue and it hasn't, so that is a disappointment," said BNP Paribas economist Ken Wattret.
The euro tumbled to a fresh six-week low below $1.32 on the news, having already suffered at the hands of a resurgent greenback following the signals from the U.S. Federal Reserve on Wednesday that it was considering an end to monetary stimulus.
Signs that Fed policymakers were becoming increasingly reluctant to continue aggressive monetary easing, revealed in the minutes of the last policy meeting, had sparked a worldwide selloff in riskier asset markets.
Europe's Eurofirst 300 index shed 1.2 percent, close to its biggest daily loss of the year so far, while London's FTSE 100, Paris's CAC-40 and Frankfurt's DAX were as much as 1.8 percent lower.
Emerging stocks were at their lowest levels since December as signs of a monetary tightening in China added to the growth and Fed policy concerns; traders speculated on a shift in monetary policy after China's central bank conducted a record high liquidity draining operation from the banking system.
A statement by outgoing premier Wen Jiabao expressing renewed concern about housing prices has also fuelled concerns that monetary policy may soon tighten.
SAFETY PLAYS WELL
In the fixed income market, worries about the growth outlook in Europe and further Fed bond buying sent safe-haven German debt to some of the highest levels seen for a month.
The main Bund futures contract was 80 ticks up at 143.20, reversing the fall seen on Wednesday and supported by the approach of an Italian general election this weekend.
Confidence in Italy has been shaken in the run-up to the voting, after a strong campaign by former prime minister Silvio Berlusconi that has opened up the three-way race with outgoing premier Mario Monti and centre-left leader Pier Luigi Bersani.
"Investors are becoming more and more cautious ahead of the weekend ... and altogether people decided here to pull the trigger and go risk-off," said Christian Lenk, a fixed income strategist at DZ Bank.
Italian 10-year yields were 4.5 basis points higher on the day at 4.47 percent, while Milan's blue-chip share index was down 3 percent, underperforming the already weak markets across Europe.
The dollar, another safety play, followed up its big gains on Wednesday adding a further 0.35 percent on an index value that includes most major currencies, although it slipped 0.5 percent against the yen to 93.
The Markit composite PMI for the euro zone, which combines both services and manufacturing surveys, fell to 47.3 in February from 48.6. It had been expected to rise to 49.0.
The data also showed a growing gap between Germany and France - the two biggest economies - which may have implications for the European Central Bank's monetary policy.
The survey found firms in Germany are enjoying a healthy rate of growth, while French service sector companies are in the midst of their worst slump since the financial crisis was at a peak in early 2009.
"The theme is still the very substantial divergence between France and Germany and that is going continue to be the case for much of the year," said Wattret of BNP Paribas.
"On the margins this is going to resonate with the dovish tone from the ECB at its last meeting, but I think the real swing factor for the ECB will be the exchange rate factor and the tightening impact it is having."
ECB Bank President Mario Draghi has said the euro's exchange rate was important for growth and inflation and the bank is already monitoring the economic impact of the euro's strength.
In commodity markets, the prospect of weakening demand from China, a possible early end to the Fed's policy of quantitative easing and the stronger dollar sent all markets lower.
London copper struck its lowest in nearly two months, at $7,863.50 a tonne, while oil dropped below $114.50 a barrel for the first time this month, having seen its biggest daily fall of the year on Wednesday.
Growth-attuned precious metal platinum fell 3 percent to hit a five-week low. Traditional safe haven gold popped higher, to $1,569.70 an ounce, after the Fed minutes had pushed it to a seven-month low.
"Long-position holders have been looking to sell for profit-taking," said Yusuke Seta, a commodity sales manager at Newedge Japan. "I guess this is a good time to sell."