A man accused of murder ambushed and repeatedly stabbed his uncle due to "disgust" over his second marriage to a close family member, a jury has been told.

Za'id Abdus Samad, 28, faced Queensland Supreme Court on Tuesday and pleaded not guilty to the murder of Abdul Basith Mohammed.

Mr Mohammed, a restaurant owner, was found dead in the backyard of his home at Kuraby on Brisbane's outer southern outskirts, in the early hours of October 25, 2017.

The 35-year-old had been stabbed five times and was lying face down and surrounded by blood on a concrete slab in a gap between his garden shed and his property's boundary fence.

Mr Mohammed's wife called police after hearing screams when he went to investigate a loss of power to the home about midnight, crown prosecutor Toby Corsbie told the j

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