CANADA RESEARCH ROUNDUP-Blackpearl Resources, Teck Resources

March 24 (Reuters) - Securities analysts revised their ratings and price targets on several Canadian companies, including Blackpearl Resources, Teck Resources and Power Corporation of Canada, on Thursday. HIGHLIGHTS * AGT Food and Ingredients Inc : CIBC raises target price to C$45 from C$39 * Corus Entertainment Inc : NBF cuts to sector perform from outperform * Power Corporation of Canada : RBC raises target to C$33 from C$32; sector perform