The semi-finals and final are scheduled for Friday’s second day of the four-day meet.
The athletes are hunting places on the national team to the August 5-21 Olympic Games in Rio de Janeiro, Brazil.
Places on the national team to the NACAC Under-23 Championships in Mayaguez, Puerto Rico from July 15-17 are also up for grab.
Usain Bolt won Heat 4 of the 100-metre quarter-final in 10.15 seconds. He finished ahead of Everton Clarke (10.16) and Michael Frater (10.31).
Bolt, the world’s fastest man, is targeting a defence of his 100, 200 and 4×100-metre titles in Rio.
The most impressive qualifier was Nickel Ashmeade, who clocked 10.07 seconds to easily win Heat 3. Warren Weir was well beaten into second in 10.17.
Yohan Blake also won his heat. He got the better of Kemar Bailey-Cole in a very close race. Both athletes were credited with the same time – 10.26 seconds.
Asafa Powell was beaten into third place in Heat 1 and is also through to the semi-finals. Powell clocked 10.17 seconds. Jevaughn Minzie clocked 10.15 seconds to win the race, just ahead of Senoj-Jay Givans, who did 10.16.
Just like the men, all the top female athletes are through to the semi-finals of the women’s 100 metres.
The women’s semi-finals and final are also scheduled for Friday’s second day.
Christania Williams is the fastest qualifiers after clocking 11.20 seconds to win Heat 1 of the preliminaries in commanding fashion.
Shelly-Ann Fraser-Pryce, the 100-metre champion at the 2008 and 2012 Olympics just like Bolt, advanced to the semi-finals with an 11.38 clocking. Fraser-Pryce also won her heat in commanding fashion.
Veronica Campbell-Brown clocked 11.39 seconds to win her heat, while the talented Elaine Thompson beat Kali Davis-White in a close race to win Heat 5. Both athletes were credited with 11.38 seconds.
Meanwhile, Kaliese Spencer and Ristananna Tracey are safely through to Friday’s final of the women’s 400 metres hurdles.
Tracey is the fastest qualifier with 55.96 seconds, while Spencer won her heat in 56.13.
Janieve Russell, who is the second fastest 400-metre hurdler this season, did not compete because of injury.
Isa Phillips and young Jaheel Hyde, who competed in Heat 2 of the preliminaries, are the fastest qualifiers going into the men’s 400-metre final, which is also scheduled for Friday.
Both clocked identical 49.31 seconds, but Phillips was credited with the victory.
Roxroy Cato (49.83) and Annsert Whyte (49.37) are also safely through.
Earlier, Clive Pullen secured his ticket to Rio after winning the men’s triple jump. He produced a personal best 16.90 metres to secure the title.