DUBAI, Sept 25 (Reuters) - Petrochemical shares dragged Saudi Arabia's equity index lower in early trade on Sunday after oil prices fell 4 percent at the end of last week, while Qatar's main index regained some ground.

Riyadh's main index .TASI slipped 0.3 percent after 15 minutes of trade, with bellwether petrochemical producer Saudi Basic Industries 2010.se declining 0.9 percent.

The retail segment was also weak, with one of the largest electronics stores, Jarir Marketing 4190.SE , down 1.0 percent.

Dubai's main index .DFMGI fell 0.5 percent, with losers outnumbering gainers 12-to-3. Emaar Properties EMAR.DU , the largest listed developer, was down 0.8 percent and Dubai Financial Market DFM.DU , the only listed stock exchange in the Gulf, dropped 1.5 percent.

Profit taking on last week's top performing shares weighed on Abu Dhabi's index .ADI , which slipped 0.3 percent. Abu Dhabi National Energy TAQA.AD lost 1.9 percent.

But Qatar's index .QSI , which was down 1.2 percent in a volatile week, added 0.2 percent.

Some stocks, which are now members of the FTSE secondary emerging market index climbed, with Ezdan Holding Group ERES.QA adding 1.3 percent.

(Reporting by Celine Aswad; Editing by Louise Heavens) ((celine.aswad@thomsonreuters.com)(+9715 62247653)(Reuters Messaging: celine.aswad.thomsonreuters.com@reuters.net))