Madagascar crisis talks derailed

* Ratsiraka's allies pull out of talks to end crisis

* Ravalomanana supporters lay down own conditions

By Alain Iloniaina

ANTANANARIVO, May 24 (Reuters) - One of Madagascar's main political parties pulled out of talks to end the Indian Ocean island's political crisis at the weekend, days after the United Nations hailed a breakthrough.

The snub by allies of former President Didier Ratsiraka, who remains an influential figure in Malagasy politics, threatens to derail efforts to form a consensus government and agree a roadmap leading to presidential elections.

Ratsiraka was forced into exile in France during the country's last crisis in 2002 that saw Marc Ravalomanana take power. He was in turn forced into exile in South Africa this year by new President Andry Rajoelina.

"The delegation suspends its role in talks," Ange Andrianarisoa, a member of Ratsiraka's team, told Reuters.

Madagascar has been wrought by political instability since the beginning of 2009 when Rajoelina challenged the president and seized power in March with the help of dissident soldiers.