The 20-year-old Australian, who has won three gold medals at the meet, set the previous mark of 1:05:71 in the same pool at the Melbourne Aquatic Center on Feb. 3 at the Australian CommonwealthGames trials.
''I'm in absolute shock,'' Jones said. ''I cannot believe it. It is absolutely amazing _ I was so nervous beforehand I had (stomach) cramps.''
Jones also holds the record in the 200 breaststroke. She was a surprise winner in the 50 breaststroke in her first final of the CommonwealthGames program, and added the 200 title on Saturday night.
Jones said was unhappy with her 200 time, and knew she would feel pressure from teammate Jade Edmistone, who holds the world record in the 50 breaststroke.
She was almost a half-second under world-record pace when she made the turn, and held it together on the second length.
''I was dying a fair bit, in every stroke I was pulling, and they were getting louder and louder _ the crowd has a lot to do with it,'' Jones said.
''It seems that 2006 has been the year for me. Getting a bit of balance has been the most important thing.''
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