ZAGREB, Yugoslavia (AP) _ A center-right coalition garnered more than 79 percent of the seats in the first round of Croatia's first free elections in 50 years, according to final results published Saturday.

A total of 131 seats in the 356-seat tri-cameral regional parliament were decided in the first round of voting April 22-23, the state Tanjug news agency reported. The remaining 225 seats are to be voted on in a second round of balloting May 6-7.

The center-right Croatian Democratic Union won 104 of the 131 seats decided, while the Communist Party - renamed the Party for Democratic Reform - won 13, according to final official results carried by Tanjug.

The centrist Coalition for National Accord won 3 seats, Tanjug said.

While in the first round more than 50 percent of the vote was needed to win a seat, in the second round only a simple majority is required.

Franjo Tudjman, the leader of the Union, has expressed confidence that his party will emerge victorious after the second round of voting.

He said after the first round last week that the first task of his party would be to prepare a new Western-style democratic constitution for Croatia and to discuss Yugoslavia's future with other states in the Yugoslav federation.

Tudjman's party favors Yugosalvia becoming a loose alliance of semi- independe nt states in a confederation.

The Croatian Democratic Union, which waged a campaign based largely on national sentiments, was vehemently opposed during the election by Serbs, who make up about 10 percent of Croatia's 4.8 million people.

Serbia and Croatia, the second-largest state, have been traditional rivals ever since they united in Yugslavia in the aftermath of World War I.

Yugoslavia is curently a looose federation of six republics.

Croatia and the neighboring republic of Slovenia have held Yugoslavia's first post-war multiparty elections. Two more member republics are planning to hold similiar elections later this year. Communist-ruled Montenegro and Serbia have not legalized opposition parties.