Veronica Campbell-Brown continued Jamaica's domination of the Olympic sprint events by retaining her 200m title at Beijing Olympics on Thursday.
Campbell-Brown's comfortable victory means Jamaica have won four golds, a silver and two bronzes in both the men's and women's 100m and 200m events, in a battle for supremacy with the much-vaunted US track team.
The Jamaican, who won 100m gold and 200m silver at last year's world championships in Osaka, clocked a personal best of 21.74 seconds to finish ahead of American Allyson Felix (21.93sec), who also won silver behind the Jamaican at the Athens Games four years ago.
Jamaican Kerron Stewart picked up her second medal here after pipping American Muna Lee at the line in 22.00sec for bronze, following up her silver-medal showing in the 100m.
"I am very happy," said Campbell-Brown. "It's great to come out and defend my gold medal.
"It's been great to see Jamaica get a clean sweep of the sprints. Now I have to concentrate on the relays."
Campbell-Brown, running in lane four, bolted out of her blocks and immediately gained on reigning world 200m champion Felix in the lane outside her.
The 26-year-old powered through the first 50 metres, and had the psychological nudge on Felix coming around the bend.
Entering the final straight, Campbell-Brown was two metres clear of the field, with Stewart neck-and-neck with Felix for second.
The American battled her way past Stewart, who pipped Lee by 0.01sec on the line.
But no one could catch Campbell-Brown whose fluid style saw her coast through to the finish line.
Felix expressed her dismay at not getting a top-podium finish.
"I am disappointed not to get gold," said the 22-year-old. "But I just have to remember the verse in the Bible which says 'give thanks in every circumstance'.
"The start was bad and the end wasn't that great either, but I'm grateful for the silver."
Stewart said Usain Bolt had been the spark for the Caribbean island's unprecedented track success.
Bolt this week recorded a stunning sprint double - the first since American Carl Lewis achieved the feat at the 1984 Los Angeles Games - in which he set new world records in both the 100 and 200m.
"Bolt started it off and Jamaica's sprinters have just kept it going," Stewart said.
"We have a great tradition of sprinters and we wanted to show what we could do here."
Jamaica, who have also picked up a gold in the women's 400m hurdles and a silver in the women's 400m flat, also have medal hopes in the 4x100 and 4x400m relays.
The women's 4x100m relay team are defending Olympic champions, and the 4x400m squad won bronze in Athens.
The men's 4x100m team should realistically be among the medallists if Bolt and team-mates Asafa Powell, Michael Frater, Nesta Carter and Dwight Thomas perform to the best of their abilities.