HONG KONG, July 19 (Reuters) - China state-backed Greenland Holdings has defaulted on a dollar bond worth $432 million due to a missed amortization payment, Debtwire reported on Wednesday, citing a notice from the trustee.

The default adds to the problems plaguing the Chinese property sector as more liquidity troubles have emerged in the past few weeks despite policy support.

Shanghai-based Greenland was the first state-backed developer to extend dollar bond payments last year after the property sector plunged into a debt crisis in mid-2021.

HSBC, trustee for Greenland's 6.75% bond due June 25, 2024, notified holders on July 14 of an event of default because the developer failed to pay the 5% amortization worth 22.5 million on due day, and the failure continued for the next seven days, according to Debtwire.

Greenland did not respond to a request for comment.

Late last year, the developer extended the maturity of the June 2023 notes in question by one year and a series of other bonds by two years. It promised to pay 5% of the principal on the original maturity dates, together with interest. (Reporting by Clare Jim and Xie Yu; Editing by Kim Coghill)