The country didn’t get the energetic rebound in economic growth hoped for from the government’s tax rebates in the second quarter, and the economy jolted into reverse at the end of 2007, raising new recession fears.

The Commerce Department reported Thursday that gross domestic product, or GDP, increased at an annual rate of 1.9 percent in the April-to-June period. That marked an improvement over the feeble 0.9 percent growth logged in the first quarter of this year and the outright contraction in the economy during the final quarter of last year.