Group A
Aberdeen
Raith Rovers
Peterhead
Dumbarton
Stirling Albion
Group B
Kilmarnock
Partick Thistle
Montrose
Stenhousemuir
Fraserburgh
Group C
Ross County
Dunfermline Athletic
Alloa Athletic
East Fife
Buckie Thistle
Group D
Hibernian
Morton
Falkirk
Clyde
Bonnyrigg Rose Athletic
Group E
St Mirren
Arbroath
Airdrieonians
Edinburgh City
Cowdenbeath
Group F
St Johnstone
Ayr United
Queen of the South
Annan Athletic
Elgin City
Group G
Livingston
Inverness Caledonian Thistle
Cove Rangers
Kelty Hearts
Albion Rovers
Group H
Dundee
Hamilton Academical
Queen's Park
Forfar Athletic
Stranraer
The full fixture list and TV selections will be published in due course.
The eight group winners and three best runners-up will join European qualifiers Celtic, Rangers, Heart of Midlothian, Dundee United and Motherwell in the last 16.
Group stage
MD1: Weekend of July 9/10
MD2: Midweek of July 12/13
MD3: Weekend of July 16/17
MD4: Midweek of July 19/20
MD5: Weekend of July 23/24
Second round
Midweek of August 30/31
Quarter-finals
Midweek of October 18-20
Semi-finals
Weekend of January 14/15
Final
Sunday February 26