A new constitution that will turn Kyrgyzstan into a parliamentary republic has come into effect after it was backed in a referendum. Kyrgyz election officials said Friday that more than 90 percent of ballots were cast in favor of the constitution, which dilutes the presidency's wide-ranging powers. This impoverished Central Asian nation has been wracked by months of turbulence and violence since an uprising in April led to the ouster of President Kurmanbek Bakiyev. Parliament was dissolved after his overthrow and will be reconstituted in an October election. In Sunday's referendum, voters also approved keeping interim President Roza Otunbayeva on as leader until the end of 2011. Her inauguration as caretaker president will be held Saturday.