Ai Miyazato took the LPGA Founders Cup lead on a hot afternoon in the desert, playing a late four-hole stretch in 5 under for a tournament-record 9-under 63.
Returning from a whiplash injury sustained in a five-vehicle crash after a tournament in Thailand last month, the Japanese star birdied the par-3 14th, holed a 20-foot eagle putt on the par-5 15th and added birdies on the par-4 16th and par-3 17th to open a two-stroke lead.
She was hurt three weeks ago on the way to the Bangkok airport and withdrew the following week in Singapore as a precaution because of stiffness in her neck, shoulder and back.
South Korea's Jee Young Lee was in second at 7-under 65. Candie Kung, Brittany Lang, Gerina Piller and Pornanong Phatlum shot 66.