Kingston - Rasheed Dwyer and Anneisha McLaughlin were first-time national champions after winning their 200m finals on Sunday on the last day of the Jamaican athletics championships.
Dwyer produced a new personal best of 20.04 seconds (wind 0.5m/sec) to beat 2014 world leader Warren Weir, who was second in 20.17.
Jason Livermore was third in 20.25 seconds.
McLaughlin clocked 22.79 seconds (-0.6m/sec), edging Schillonie Calvert who took second in 22.88. Samantha Henry-Robinson was third in 23.15.
Embattled Sherone Simpson, competing pending the outcome of her doping ban appeal, was fourth and after failing to make it to the 100m finals on Friday will miss out on a place on the team for the Commonwealth Games July 23-August 3 in Glasgow, Scotland.