By Mure Dickie

HUAIROU, China, Sep 2 (Reuter) - Exiled Tibetan women accused Beijing Saturday of genocide and forced abortion in their Himalayan homeland and told a grassroots forum that China had sabotaged their workshop just minutes earlier.

Women from the Chinese-ruled region in an officially sponsored delegation disputed the charges, saying they were the real Tibetans, and challenged the exiles to come to talk to them.

The clash graphically underscored the tension surrounding participation by exiled followers of the Dalai Lama at the U.N.-affiliated Non Governmental Organizations Forum on Women in this town outside Beijing.

The nine women from the independent Tibetan Women's Delegation clashed at their workshop with the Chinese-sponsored Tibetans and fled in tears when they were shouted down by their homeland colleagues.

At the workshop, some of the nine had given testimony on human rights abuses and nuclear pollution in their remote Himalayan homeland, saying poorly educated nomads were bearing the brunt of environmental degradaton caused by Chinese uranium mines and nuclear facilities.

The nine, dressed in brightly colored traditional skirts and jackets, accused China of flooding Tibet with Chinese immigrants and of tough birth control policies such as forced abortion and sterilisation that amounted to genocide.

China says ethnic Han Chinese make up just five percent of the population.

Female dissidents and nuns who took part in pro-independence activites in the deeply religious Buddhist region were routinely tortured and raped, the exiles said.

A Tibetan from the Chinese group got up and began to make a speech, and a shouting match erupted when the exiles told her she was permitted to ask questions but not to orate.

Other members of the Chinese-sanctioned group began to heckle and shout.

"It got totally out of hand," exile delegate Tenki Tendus Davis said later.

The exiles, who have been followed and filmed by Chinese security officials since they arrived earlier this week, began a Buddhist chant. When the women from their homeland shouted and booed, they fled the room in tears. The workshop broke up in disarray.

"It was very upsetting," said Tendus Davis.

Official Tibetan delegates had been planted in the small room for the workshop and tried to take it over, making it impossible to continue the meeting, said delegation member Yodon Thondon, whose parents fled Tibet after an abortive uprising against Chinese rule in 1959.

Members of the Chinese-organized group dismissed the exiles' vision of an oppressed and rebellious region, plagued by brutal torture of female independence activists.

"We are the real Tibetans," said Suo Na, speaking in the lavishly decorated tent of the official delegates. "They do not live in Tibet and they know nothing of Tibet."

Relations between Chinese and ethnic Tibetans in the region were excellent, she said.

"We would like to talk to (the exiles)," Suo said in perfect Chinese. "But they don't dare come to meet us."

China celebrated Friday its 30 years of formal rule over rebellious Tibet as creating a miracle on the roof of the world and issued a blistering attack on the Dalai Lama, accusing him of trying to split China.

People's Liberation Army troops entered Tibet in 1950 and Beijing solidified its rule over Tibet in 1965 by setting up an ostensibly autonomous government.

Since the late 1980s, Chinese troops and police have suppressed many anti-Chinese uprisings, usually led by lamas loyal to the Dalai Lama, who won the Nobel Peace Prize in 1989.