Adams finally won his first world crown in January

The tournament, from 17-25 November in Wolverhampton, was initially billed as bringing together the best players from across the sport's bitter divide.

But it clashes with the Winmau World Masters in Bridlington (17-18 Nov), and Adams is committed to the BDO event.

He said: "Loyalty is not a dirty word in my vocabulary, and I will not be playing in the Grand Slam of Darts."

The reigning Lakeside title holder and long-time England captain, 51, claimed he has had several phone calls from PDC boss Barry Hearn, asking him to reconsider.

"He accuses me of having misguided loyalties to the British Darts Organisation and says he feels 'sorry' for me because I don't want to play in his event," Adams said.

"I've been a BDO player for 25 years and they have made me the player I am today.

"The truth is, without me involved, the Grand Slam does not deliver what the fans and viewers have been led to expect."

The Grand Slam is being televised by ITV, while the World Masters will feature on the BBC.

This year's Masters has seen its total prize fund double to �60,000, with the winner banking �25,000.