Dumbarton booked their place in the draw for the last 32 of the IRN-BRU Cup with a 2-1 home win over Rangers Colts on Wednesday night.
Calum Gallagher (penalty) and Mark Stewart netted for the Sons before Ryan Hardie pulled one back but Stevie Aitken's side held on.
Craig Malcolm's double helped Alloa Athletic see off Dundee Colts 4-2 at Dens Park while Motherwell's youngsters came from behind to beat Queen's Park 2-1 at Forthbank.
Craig Moore and Alan Forrest were among the scorers as Ayr United thumped Lowland League East Stirlingshire 5-1 at Ochilview.
